PLANT PATHOLOGY- PAGE 1
Plant Pathology MCQs
1 Who is considered as the "Father of Modern Plant Pathology and Indian Mycology"?
A. Oscar Brefeld
B. E.J.Butler
C. W.M.Stainley
D. E.F.Smith
Ans: B
2 Who was the first president of Indian Phytopathology?
A. Dr. J.F.Dastur
B. Dr.K.C.Mehta
C. Dr.B.B.Mundkar
D. Dr.Raghubir Prasad
Ans: A
3 The Monographs on "Genera of Uredinales of the world" Ustilaginales of India" were written by?
A. Dr.J.F.Dastur
B. E.J.Butler
C. Dr.M.J.Thirumalachar
D. Dr. T.S.Ramakrishnan
Ans: C
4 The disease whcih is due to Zn-deficiency in rice was first discovered and reported from India by which scientist and its name?
A. Dr. J.P.Verma-Tundu
B. Dr.M.K.Hingorani-Leaf spot
C. Dr. S.R. Bose-Smut
D. Dr. Y.L.Nena-Khaira
Ans: D
5 Which Institute started post graduate programme in Plant Pathology for the first time in India:
A. Govt. Agriculture college,kanpur in 1945
B. Rajasthan College of Agriculture,Udaipur,1955
C. Tamil Nadu Agriculture University,1956
D. College of Agriculture, Pune,1950
Ans: A
6 Who dicovered virus diseases in Plants for the first time in the world?
A. E.F.Smith-1983
B. M.W.Beijerinck-1998
C. Michael Holling-1962
D. Kassanis-1968
Ans: B
7 P.A.Millardet discovered a fungicide which was effective against which disease and name of the fungicide:-
A. Rust disease of wheat-Bavistin
B. Downy mildew of BajraApron SD 35
C. Powdery mildew of cucurbitsSulfex
D. Downy mildew of grapesBordeaux mixture
Ans: D
8 Which ancient book in India which deals with the disease of plants and their control:-
A. Charak Samhita-4th Century.
B. Genera Plantarum- 8th Century
C. Surapala Vriksharveda-9th Century
D. Sushrut samhita-7th Century
Ans: C
9 Dutch elm disease is caused by:-
A. Viroid
B. Bacteria
C. Fungus
D. Mycoplasma
Ans: C
10 Which group belong to obligate parasite?
A. Powdery mildew,Rusts, Dowry mildew
B. Smuts,Rust,and blight
C. Anthracnose,Root rot,Collar rot
D. Cankers,Stripe diseases and Scabs.
Ans: A
11 PR4 protein is related is
A. chitinase
B. B-1,3 glucanase
C. Globulins
D. Fungal growth inhibition
Ans: D
12 Phytoalexins are inhibitory is
A. Only fungi
B. Fungi, bacteria, nematodes, and other organisms
C. Only bacteria
D. Only Viruses
Ans: B
13 The best example of macrocyclic rust in India is
A. Yellow rust of wheat
B. Rust of groundnut
C. Black stem rust of wheat
D. Common rust of maize
Ans: C
14 At what pressure culture media for microorganisms can be autoclaved :
A. 121.6 °C and 15 pounds(6.8 kg) pressure for 20 minutes.
B. 150 °C and 15 pounds(6.8 kg) pressure for 30 minutes.
C. 200 °C and 20 pounds(6.8 kg) pressure for 30 minutes.
D. 210 °C and 20 pounds(6.8 kg) pressure for 20 minutes.
Ans: A
15 The minimum equipments needed for a mushroom spawn lab are :A. Air conditioner ,Auto clave, refrigerator etc.
B. Luminar air flow cabinet, B.O.D. Autoclave
C. B.O.D., oven , colony counter and air circulation ducts .
D. B.O.D., shakes, spectrophotometer and microscope.
Ans: B
16 Blight of cumin, in Rajasthan is caused by :-
A. Alternaria alternata
B. Alternaria tenuis
C. Alternaria burnsii
D. Xanthomonas spp.
Ans: C
17 Which one of the following microorganisms fixes nitrogen but does not induce root nodule formation :-
A. Rhizobium
B. Azorhizobium
C. Bradyrhizobium
D. Azospirillum
Ans: D
18 Which one of the following transmitts Grape fan and tobacco ring spot virus :-
A. Fungus
B. Whitefly
C. Grasshopper
D. Nematodes
Ans: D
19 Most of the Colletotrichum stop cause :-
A. Blight
B. Scab
C. Root rot
D. Anthracnose
Ans: D
20 Loose smut of wheat completely :-
A. Soil borne disease
B. Soil and seed borne disease
C. Seed borne disease
D. Air borne disease
Ans: C
21 Pseudomonas syringae pv tabaci produces.
A. AM.-toxins
B. Tabo-toxins
C. Phaseolotoxin
D. Syringotoxin
Ans: B
22 Elicitors are capable of inducing :-
A. Toxin synthesis
B. Phytoalexin synthesis
C. Enzyme synthesis
D. Coenzyme synthesis
Ans: B
23 Burgundy mixture was discovered in 1987 as a substitute of :-
A. Chestnut compound
B. Bordeaux mixture
C. copper carbonate
D. Ziram
Ans: B
24 Pure culture of ediable mushroom can be maintained by :- A. Frequent subculturing on PDA.
B. By keeping culture in Refrigerator.
C. Lyophilization of pure culture
D. Subculturing on changing media everytime .
Ans: C
25 Which one is an example of host specific toxin?
A. Tabotoxin
B. Fusaric acid
C. Piricularin
D. Victorin
Ans: D
26 In Northern states of India, mushroom production is largely of button mushroom and compost preparation method is :A. Long method of composting (by manual turning)
B. Short method of composting (by using pasteurization chamber)
C. Pit method of composting using all ingredients mixed in a pit .
D. FYM like composting method.
Ans: A
27 Downy mildew is caused by members of :-
A. Pythiaceae
B. Moniliaceae
C. Albergnaceae
D. Pernosporaceae
Ans: D
28. Clamp-connection are found in :-
A. Albugo
B. Erysiphe
C. Puccinia
D. Ustilago
Ans: D
29. Black-heart disease of patato is caused by :-
A. Phytophthora infestans
B. Alternaria solani
C. Low oxygen and high temperature
D. Boron deficiency
Ans: C
30. The term hypersensitive response was given by :-
A. Mc Kinney
B. W.N. Stanley
C. E.C. Stakman
D. Bawden and Pirie
Ans: C
31. Who discovered disease cycle of cereal rusts in India :-
A. M.K.Patel
B. B.B. Mundkar
C. E.J.Butler
D. K.C.Mehta
Ans: D
32 Which of the rusts was studied by flor(1956) for his gene- for - gene hypothesis :-
A. Rust of wheat
B. Rust of Tea
C. Rust of Gram
D. rust of Flax
Ans: D
33 Which of the fungus causes hypertrophy of floral parts and tumors in all parts of the host plant:
A. Peronospora arborescens
B. Sclerospora sorghii
C. Albugo candida
D. Bremia sp.
Ans: C
34 Which of the bacterium can remove aflotoxin from milk, peanut,peanut oil,butter & corn?
A. Bacillus subtilis
B. Xanthormonas compestris
C. Flavobaeterium
D. Pseudomonas flourocens
Ans: C
35. Parasexual cycle was discovered in the fungus :-
A. Aspergillus niger
B. Aspergillus flavus
C. Aspergillus fumigatus
D. Aspergillus nidulans
Ans: D
36. The strength of alcohol used in Gram;s stain is :-
A. 75%
B. 85%
C. 95%
D. 55%
Ans: C
37. Who wrote the book " Bacteria in relation to plant diseases".
A. Robert Koch
B. M.Goto
C. Jhon Tyndall
D. Erwin Frink Smith.
Ans: D
38 Who reported phenomenon of cross- protection for the first time in citrus tristeza virus :-
A. K.M.Smith
B. W.C.Price
C. H.H.Mckinney
D. R.A.Salaman
Ans: C
39 Potato virus-Y is transmitted by aphid vector in :-
A. Non- persistent manner
B. Persistent Manner
C. Semipersistent manner
D. Propagative manner
Ans: A
40 Which of the following is mostly used as an abrasive in laboratory :-
A. Telecom powder
B. Silica Gel
C. Charcoal Powder
D. Carborandum
Ans: D
41 Which of the following is used for green preservation :-
A. Zink sulphate
B. Copper sulphate
C. Calcium sulphate
D. Iron sulphate
Ans: B
42 An important disease of apple and pear which is called as fire blight was first discovered by –
A. S.wakesman,1944
B. J.H. Cragie,1927
C. T.J. Burill,1878
D. Johnson in, 1927
Ans: C
43 Which fungus has been found to be a very good biological agent for soil borne diseases ?
A. Chaetomium
B. Aspergillus
C. Trichoderma
D. Rhizopus
Ans: C
44 Phylum based classification was based on
A. 16 sr DNA molecular data
B. morphological and physiological characters
C. Serological characters
D. Host range
Ans: A
45 On the basis of phylogenetic relationship the sister group relationship exists between :-
A. Zygomycota - Ascomycota
B. Ascomycota – Basidiomycota
C. Omycota- Ascomycota
D. Chytridiomycota – Basidiomycota
Ans: B
46 In case of Deuteromycetes , the hyphal cell which directly transform into a conidium term as :-
A. Hyphogenous cell
B. Conidiophores
C. Coniothallus
D. Conidiogenous cell
Ans: D
47 In bacteria cytoplasm is surrounded by cell membrane and cell wall, while in mollicutes:-
A. Surrounded by cell membrane
B. surrounded by cell wall
C. are having three layers cell cover
D. does not have any protective cover.
Ans: A
48 Most plant pathogenic bacteria are :-
A. Cocci and having single flagella.
B. Irregular in shape and having all kinds of rods and cocci shapes .
C. Rod shaped with only exception streptomyces which is filamentous.
D. All plant pathogenic bacteria are filamentous.
Ans: C
49 Angular leaf spot of Cucumber is caused by :
A. Xanthomonas campestris pv. vesicatoria
B. Pseudomonas syringae pv. phaseolicola
C. Pseudomonas syringae pv lacrymans
D. Xanthomonas campestris pv. Phaseoli
Ans: C
50 Xylem inhabiting bacteria are serious plant pethogens and they are placed :
A. In the genus Pseudomonas , rod shaped cells.
B. In the genus Xanthomonas , rod shaped cells.
C. In the genus Clostridium , rod shaped cells.
D. In the genus Xyllela , rod shaped cells.
Ans: D
A. Oscar Brefeld
B. E.J.Butler
C. W.M.Stainley
D. E.F.Smith
Ans: B
2 Who was the first president of Indian Phytopathology?
A. Dr. J.F.Dastur
B. Dr.K.C.Mehta
C. Dr.B.B.Mundkar
D. Dr.Raghubir Prasad
Ans: A
3 The Monographs on "Genera of Uredinales of the world" Ustilaginales of India" were written by?
A. Dr.J.F.Dastur
B. E.J.Butler
C. Dr.M.J.Thirumalachar
D. Dr. T.S.Ramakrishnan
Ans: C
4 The disease whcih is due to Zn-deficiency in rice was first discovered and reported from India by which scientist and its name?
A. Dr. J.P.Verma-Tundu
B. Dr.M.K.Hingorani-Leaf spot
C. Dr. S.R. Bose-Smut
D. Dr. Y.L.Nena-Khaira
Ans: D
5 Which Institute started post graduate programme in Plant Pathology for the first time in India:
A. Govt. Agriculture college,kanpur in 1945
B. Rajasthan College of Agriculture,Udaipur,1955
C. Tamil Nadu Agriculture University,1956
D. College of Agriculture, Pune,1950
Ans: A
6 Who dicovered virus diseases in Plants for the first time in the world?
A. E.F.Smith-1983
B. M.W.Beijerinck-1998
C. Michael Holling-1962
D. Kassanis-1968
Ans: B
7 P.A.Millardet discovered a fungicide which was effective against which disease and name of the fungicide:-
A. Rust disease of wheat-Bavistin
B. Downy mildew of BajraApron SD 35
C. Powdery mildew of cucurbitsSulfex
D. Downy mildew of grapesBordeaux mixture
Ans: D
8 Which ancient book in India which deals with the disease of plants and their control:-
A. Charak Samhita-4th Century.
B. Genera Plantarum- 8th Century
C. Surapala Vriksharveda-9th Century
D. Sushrut samhita-7th Century
Ans: C
9 Dutch elm disease is caused by:-
A. Viroid
B. Bacteria
C. Fungus
D. Mycoplasma
Ans: C
10 Which group belong to obligate parasite?
A. Powdery mildew,Rusts, Dowry mildew
B. Smuts,Rust,and blight
C. Anthracnose,Root rot,Collar rot
D. Cankers,Stripe diseases and Scabs.
Ans: A
11 PR4 protein is related is
A. chitinase
B. B-1,3 glucanase
C. Globulins
D. Fungal growth inhibition
Ans: D
12 Phytoalexins are inhibitory is
A. Only fungi
B. Fungi, bacteria, nematodes, and other organisms
C. Only bacteria
D. Only Viruses
Ans: B
13 The best example of macrocyclic rust in India is
A. Yellow rust of wheat
B. Rust of groundnut
C. Black stem rust of wheat
D. Common rust of maize
Ans: C
14 At what pressure culture media for microorganisms can be autoclaved :
A. 121.6 °C and 15 pounds(6.8 kg) pressure for 20 minutes.
B. 150 °C and 15 pounds(6.8 kg) pressure for 30 minutes.
C. 200 °C and 20 pounds(6.8 kg) pressure for 30 minutes.
D. 210 °C and 20 pounds(6.8 kg) pressure for 20 minutes.
Ans: A
15 The minimum equipments needed for a mushroom spawn lab are :A. Air conditioner ,Auto clave, refrigerator etc.
B. Luminar air flow cabinet, B.O.D. Autoclave
C. B.O.D., oven , colony counter and air circulation ducts .
D. B.O.D., shakes, spectrophotometer and microscope.
Ans: B
16 Blight of cumin, in Rajasthan is caused by :-
A. Alternaria alternata
B. Alternaria tenuis
C. Alternaria burnsii
D. Xanthomonas spp.
Ans: C
17 Which one of the following microorganisms fixes nitrogen but does not induce root nodule formation :-
A. Rhizobium
B. Azorhizobium
C. Bradyrhizobium
D. Azospirillum
Ans: D
18 Which one of the following transmitts Grape fan and tobacco ring spot virus :-
A. Fungus
B. Whitefly
C. Grasshopper
D. Nematodes
Ans: D
19 Most of the Colletotrichum stop cause :-
A. Blight
B. Scab
C. Root rot
D. Anthracnose
Ans: D
20 Loose smut of wheat completely :-
A. Soil borne disease
B. Soil and seed borne disease
C. Seed borne disease
D. Air borne disease
Ans: C
21 Pseudomonas syringae pv tabaci produces.
A. AM.-toxins
B. Tabo-toxins
C. Phaseolotoxin
D. Syringotoxin
Ans: B
22 Elicitors are capable of inducing :-
A. Toxin synthesis
B. Phytoalexin synthesis
C. Enzyme synthesis
D. Coenzyme synthesis
Ans: B
23 Burgundy mixture was discovered in 1987 as a substitute of :-
A. Chestnut compound
B. Bordeaux mixture
C. copper carbonate
D. Ziram
Ans: B
24 Pure culture of ediable mushroom can be maintained by :- A. Frequent subculturing on PDA.
B. By keeping culture in Refrigerator.
C. Lyophilization of pure culture
D. Subculturing on changing media everytime .
Ans: C
25 Which one is an example of host specific toxin?
A. Tabotoxin
B. Fusaric acid
C. Piricularin
D. Victorin
Ans: D
26 In Northern states of India, mushroom production is largely of button mushroom and compost preparation method is :A. Long method of composting (by manual turning)
B. Short method of composting (by using pasteurization chamber)
C. Pit method of composting using all ingredients mixed in a pit .
D. FYM like composting method.
Ans: A
27 Downy mildew is caused by members of :-
A. Pythiaceae
B. Moniliaceae
C. Albergnaceae
D. Pernosporaceae
Ans: D
28. Clamp-connection are found in :-
A. Albugo
B. Erysiphe
C. Puccinia
D. Ustilago
Ans: D
29. Black-heart disease of patato is caused by :-
A. Phytophthora infestans
B. Alternaria solani
C. Low oxygen and high temperature
D. Boron deficiency
Ans: C
30. The term hypersensitive response was given by :-
A. Mc Kinney
B. W.N. Stanley
C. E.C. Stakman
D. Bawden and Pirie
Ans: C
31. Who discovered disease cycle of cereal rusts in India :-
A. M.K.Patel
B. B.B. Mundkar
C. E.J.Butler
D. K.C.Mehta
Ans: D
32 Which of the rusts was studied by flor(1956) for his gene- for - gene hypothesis :-
A. Rust of wheat
B. Rust of Tea
C. Rust of Gram
D. rust of Flax
Ans: D
33 Which of the fungus causes hypertrophy of floral parts and tumors in all parts of the host plant:
A. Peronospora arborescens
B. Sclerospora sorghii
C. Albugo candida
D. Bremia sp.
Ans: C
34 Which of the bacterium can remove aflotoxin from milk, peanut,peanut oil,butter & corn?
A. Bacillus subtilis
B. Xanthormonas compestris
C. Flavobaeterium
D. Pseudomonas flourocens
Ans: C
35. Parasexual cycle was discovered in the fungus :-
A. Aspergillus niger
B. Aspergillus flavus
C. Aspergillus fumigatus
D. Aspergillus nidulans
Ans: D
36. The strength of alcohol used in Gram;s stain is :-
A. 75%
B. 85%
C. 95%
D. 55%
Ans: C
37. Who wrote the book " Bacteria in relation to plant diseases".
A. Robert Koch
B. M.Goto
C. Jhon Tyndall
D. Erwin Frink Smith.
Ans: D
38 Who reported phenomenon of cross- protection for the first time in citrus tristeza virus :-
A. K.M.Smith
B. W.C.Price
C. H.H.Mckinney
D. R.A.Salaman
Ans: C
39 Potato virus-Y is transmitted by aphid vector in :-
A. Non- persistent manner
B. Persistent Manner
C. Semipersistent manner
D. Propagative manner
Ans: A
40 Which of the following is mostly used as an abrasive in laboratory :-
A. Telecom powder
B. Silica Gel
C. Charcoal Powder
D. Carborandum
Ans: D
41 Which of the following is used for green preservation :-
A. Zink sulphate
B. Copper sulphate
C. Calcium sulphate
D. Iron sulphate
Ans: B
42 An important disease of apple and pear which is called as fire blight was first discovered by –
A. S.wakesman,1944
B. J.H. Cragie,1927
C. T.J. Burill,1878
D. Johnson in, 1927
Ans: C
43 Which fungus has been found to be a very good biological agent for soil borne diseases ?
A. Chaetomium
B. Aspergillus
C. Trichoderma
D. Rhizopus
Ans: C
44 Phylum based classification was based on
A. 16 sr DNA molecular data
B. morphological and physiological characters
C. Serological characters
D. Host range
Ans: A
45 On the basis of phylogenetic relationship the sister group relationship exists between :-
A. Zygomycota - Ascomycota
B. Ascomycota – Basidiomycota
C. Omycota- Ascomycota
D. Chytridiomycota – Basidiomycota
Ans: B
46 In case of Deuteromycetes , the hyphal cell which directly transform into a conidium term as :-
A. Hyphogenous cell
B. Conidiophores
C. Coniothallus
D. Conidiogenous cell
Ans: D
47 In bacteria cytoplasm is surrounded by cell membrane and cell wall, while in mollicutes:-
A. Surrounded by cell membrane
B. surrounded by cell wall
C. are having three layers cell cover
D. does not have any protective cover.
Ans: A
48 Most plant pathogenic bacteria are :-
A. Cocci and having single flagella.
B. Irregular in shape and having all kinds of rods and cocci shapes .
C. Rod shaped with only exception streptomyces which is filamentous.
D. All plant pathogenic bacteria are filamentous.
Ans: C
49 Angular leaf spot of Cucumber is caused by :
A. Xanthomonas campestris pv. vesicatoria
B. Pseudomonas syringae pv. phaseolicola
C. Pseudomonas syringae pv lacrymans
D. Xanthomonas campestris pv. Phaseoli
Ans: C
50 Xylem inhabiting bacteria are serious plant pethogens and they are placed :
A. In the genus Pseudomonas , rod shaped cells.
B. In the genus Xanthomonas , rod shaped cells.
C. In the genus Clostridium , rod shaped cells.
D. In the genus Xyllela , rod shaped cells.
Ans: D
51 "Viruses of bacteria" are called as :
A. DNA virus of bacteria.
B. RNA virus of bacteria
C. Bacterophages
D. Endospore forming bacteria
Ans: C
52 The viruses with small RNA genome and protein coat and associated with another helper virus for its multiplication and infection called as:
A. Satellite viruses
B. RNA - viruses
C. RNA - associated viruses
D. Begomo viruses
Ans: A
53. In China, this mushroom is treated as curing medicine for major ailments:-
A. Ganoderma lucidum
B. Lentinula edodes
C. Amanita muscaeria
D. Amanita phalloides
Ans: A
54 Spray of urea on fallen dead leaves is a poomising control for the following fruit disease:-
A. Die back of mango
B. Apple scab
C. Anthracnose of banana
D. Stem end rot of mango
Ans: B
55 Incubation of microbial cultures can be done at lower and higher temperatures then the room temperature in an equipment called as –
A. Deep freezer
B. Incubator
C. Biological oxygen demand incubator
D. Growth chamber
Ans: C
56 You have to isolate Curvularia from the maize leaves where, it cause leaf spots which media you will prefer to use :-
A. Nutrient Agar
B. Potato dextrose Agar
C. Complete medium
D. Richard's medium
Ans: B
57. In laminar - air flow cabinet, a burner and air blower is fitted for the purpose of :-
A. Burning culture and air circulation
B. To make the inoculation needle aseptic and fresh air circulation
C. To make the inoculation needle asptic and to avoid the heat through circulation
D. to make the isolation free from contaminants and circulation of fresh air through filters
Ans: D
58. Counting of colonies of bacteria/fungi/Actinomycetes can be done by using:-
A. Hand lens
B. Stereo microscope
C. Compund microscope
D. Colony counter(Digital)
Ans: D
59 Isolation and maintenance of the culture fo citrus canker bacteria Xanthomonas campestris pv.citri can be best done on the meida:-
A. Chalk agar
B. Nutrient agar
C. YEMA medium
D. Martin Agar medium
Ans: B
60 Mycoplasma diseases can be controlled by using a specific antibiotic to which these are sensitive :-
A. Oxytetracycline
B. Streptocycline sulphate
C. Agrimycine
D. Tetracycline
Ans: D
61 Cultural method of disease management includes:
A. Deep ploughing, weed removal, crop debris destruction, balanced fertilizer application etc.
B. Seed treatment, soil drenching by fungicides/pestricides, weed removal etc.
C. Foliar spray, weed removal, balance fertilizer,application and timely irrigation.
D. FYM application with neemcake powder, mulching, seed treatment and foliar spray.
Ans: A
62. Exlusion of disease/ pathogen inoculum is an important and vital task which can be done by :
A. Soil treatment , foliar application of fungicides & weedicides .
B. Seed treatment, seed certification, quarantine regulation .
C. Soil amendments, fertilizer doses in splits and weed management .
D. Soil health check, regular monitoring and application of fungicides.
Ans: B
63. In case of downy mildew diseases where, primary infection occurs , the removal of infection seedling helps in :
A. Checking spread of secondary infection and disease severity remain low.
B. Total eradication of the disease.
C. Loss in the disease developing sources .
D. There will not be any effect on severity of the disease.
Ans: A
64 The aim of crop rotation is :-
A. Changing the crop sequence.
B. Replacing the earlier crop with more valuable crop.
C. Growing non-host crop.
D. Planning for an orchard
Ans: C
65 In Rajasthan, mejority of virus diseases on crops are :-
A. Graft transmitted
B. Seed transmitted
C. Thrips transmitted
D. Aphid transmitted
Ans: D
66. Which of the virus in the following virus diseases is thermostable :-
A. Papaya leaf curl virus .
B. Tobacco mosaic virus
C. Banana bunchy top virus .
D. Cucumber mosaic virus.
Ans: B
67 Powdery mildew of cucurbits caused by Erysiphe cichoracearum was introdused in Indian in 1910 from:-
A. Bangladesh
B. Japan
C. Netherlands
D. Sri lanka
Ans: D
68. Directorate of plant protection and Quarantine has the role of preventing infected plant materials from :-
A. Airports, Sea ports
B. Air ports,Sea ports and land frontiers(entry & exit points )
C. All airports, sea ports and highways
D. Only at selected points of entry
Ans: B
69 "For every Avirulent gene in pathogen , there is dominent corresponding Resistance gene in the host" was concluded by :-
A. Vander Plank, 1962.
B. H.H.Flor,1956
C. Stakman,1958
D. Webster,J.,1959
Ans: B
70 These are low molecular weight protein compounds produced in response of infection or aboitic stress:-
A. Elicitors
B. PR-proteins
C. Antigens
D. Phytoalexins
Ans: D
71 This kind of resistance does not last long in crop varieties and can be broken with virulent races of pathogen:
A. Vertical resistance
B. Horizontal resistance
C. Cytoplasmic resistance
D. Biochemical resistance
Ans: A
72 The hyphal organ which gives or exerts pressure on host surface for penetration into host is called as :-
A. Penetration peg
B. Appressoria
C. Germ tube
D. Haustoria
Ans: A
73 To cover larger area in less time to spray, fungicide/pesticide/micronutrient solution, which type of sprayes would be proper :-
A. Low volume sprayer
B. High volume sprayer
C. foot sprayer
D. Low volume power sprayer
Ans: D
74 To study the structure of viruses, electron microscope is required which was first designed and invented by:-
A. Robert Hook,1863
B. Ernst Ruska,1931
C. Lamark and Trevinarus,1802
D. MC Kinney,1929
Ans: B
75. Green ear disease of Bajra is one of the important disease in Rajasthan and its causal organism is :-
A. Claviceps purpurea
B. Sclerospora sp.
C. Peronosclerospora heteropogoni
D. Sclenrospora graminicola
Ans: D
76 According to Agroclimatic zones Zone IV 'a' and IV 'b' have maize crop as a major crop in Kharif season, Which are these areas and important economic disease of maize:-
A. Kota, Bundi, jhalawar- Bounded leaf & sheath blight
B. bharatpur, Karauli & Sawai Madhopur- curvularia spot
C. Udaipur Banaswara, Dungerpur-Stock rot of maize
D. Bikaner, Jodhpur, Jaisalmer Maydis leaf blight
Ans: C
77. Powdery mildew genera are differentaited on the basis of :-
A. Oospores and their shape
B. conidial production pattren
C. Cleistothecial appendages
D. Sporangial production
Ans: C
78 An important pathogen which causes sheath blight of rice and banded leaf and sheath blight in maize is Rhizoctonia solani and this is :
A. Mycelial, non sporeforming, sclerotial and infection through cushion.
B. Conidial, asexual reproduction, sclerotial and infection peg.
C. Oosporic, soil borne , appressorial mode of infection
D. Zoosporic, sporangial, seperate mycelium & direct penetration.
Ans: A
79 Ber is an important fruit crop of rajasthan, but powdery mildew causes loss in the chlorophyll area and ultimately affects production The causal organims is :
A. Oidium erysiphoides
B. Erysiphe polygoni
C. Leveilula taurica
D. Sphaerotheca roleana
Ans: A
80 Coriander is important spice crop of Kota, Jhalawar and Baran districts but Protomyces macrosporus causes severe losses. The Name of the disease:-
A. Blight of coriander
B. root rot of coriander
C. Necrosis of coriander
D. Stem gall of coriander
Ans: D
81 Biocontrol agents like Trichoderma viride and T. harzianun can kill the soil borne pathogen propagules like Oospores, chlamydospore, sclerotia etc. How it can be applied to soil:
A. Mixing 20 kg of Trichoderma formulation in soil.
B. Incubination of 100 kg FYM using 2 kg Trichoderma formulation and then adding to soil.
C. Mixing the Trichoderma formulation along with fertilizer application.
D. Furrow application of Trichoderma formulation.
Ans: B
82. There is increased focus on organic farming these days, if you have to control diseases in such fields the options are:
A. Seed treatment and foliar application of fungicides.
B. Seed treatment with biocontrol agent and application of fungicides as foliar spray.
C. Seed treatment with fungicide and furrow application of bio - agents.
D. Seed treatment with bio agent and foliar spray of botanicals like neem, kalmegh etc.
Ans: D
83 The latest and most sensitive technique for the diagnosis of plant pathogens within shortest possible time based on molecular approaches: -
A. Bio- PCR
B. ELISA
C. Serological diagnosis
D. Real time- PCR
Ans: D
84 Which enzymes are extremely important in pathogenesis because they provide the pathogen chemical means of entrance into the host :-
A. Hydrolytic enxymes .
B. Only cutinases .
C. Proteinases
D. Peroxidases
Ans: A
85. The reserve food material in Oospores or sexual spores in major quantity is :-
A. Glycoproteins
B. Glycogens
C. Glucose + protein
D. Galactosse and nucleoproteins
Ans: B
86 Inactvation of pathogen enzymes by host is carried out fromation of :-
A. Antienzymatic protein substances
B. formation of barriers like Tyloses
C. Production of phenolic substance like poly phenol oxidases
D. Production of toxins by the pathogens
Ans: C
87 To measure the leaf spot diseases like Cercospora leaf spot, a rating scale popular in India is:-
A. 1-10 rating scale
B. 1-5 rating scale
C. 0-9 rating scale
D. 0-4 rating scale
Ans: B
88 To screen the varietal line against downy mildew pathogens , the popular method of inoculation is :
A. Spray inoculation of conidia10³/ml.
B. Wound inoculation by suspension of cnidia
C. Tooth pick inoculation technique.
D. Sick plot technique.
Ans: D
89. A farmer comes to you with few fungal diseased plants. How you will process to give him precise solution :
A. Suggesting fungicide on the basis of symptoms.
B. Diagnosis of the pathogen and suggesting specific fungicide .
C. On the basis of severity you will suggest precautionary measures.
D. Suggesting systemic fungicide to avoid further damage.
Ans: B
90 In India if you want to get a pathogen culture identified authentically, which agencies /institutes you will contect:
A. Central Institutes of that particular crop
B. IARI and its regional stations.
C. Taxonomist and senior Faculty in the universities
D. ITCC ,IARI New Delhi, NBAIM at Mau, UP.
Ans: D
91 Based on environmental parameters, the computer simulations model "EPIVEN" was made for forecasting of the disease:-
A. Vein clearing of tobacco
B. Blossom blight of apple.
C. Southern leaf blight of maize
D. Apple scab.
Ans: D
92. Based on the available data of disease ratings, which formula you will use to calculate percent disease Index:
A. (Number of infected plants / Total no. Of plants observed) X 100
B. (Sum of the ratings/ Total plants/leaves) X 100
C. (Area of plant tissue infected / Total area) X 100
D. (Sum of the individual ratings/ Total no. Of plant/leaves observed) X (100/Maximum disease rating)
Ans: D
93. The most popular ediable mushroom in the world is (with it scientific name ):
A. Agaricus bisporus (button mushroom)
B. Pleurotus sajor-caju(Oyster mushroom)
C. Morchella Spp.(Button mushroom)
D. Phellorinia inquinaus (khumbi)
Ans: A
94 In India , the best substrate for spawn production of mushroom is:-
A. Pearlmillet grains
B. Sorghum grains
C. Rice and rye grains
D. wheat grains.
Ans: D
95 Highly priced mushroom Morchella which is called as "Gucchi" comes under the phylum:-
A. Zygomycota
B. Ascomyeota
C. Basidiomycota
D. Qomycota
Ans: B
96 Mushroom which is a popular medicinal mushroom and treated as anti-cancer and is being used worldwide:-
A. Schizophyllum commune
B. Lentinula edodes
C. Grifolla frondosa
D. Tricholoma Sp.
Ans: B
A. DNA virus of bacteria.
B. RNA virus of bacteria
C. Bacterophages
D. Endospore forming bacteria
Ans: C
52 The viruses with small RNA genome and protein coat and associated with another helper virus for its multiplication and infection called as:
A. Satellite viruses
B. RNA - viruses
C. RNA - associated viruses
D. Begomo viruses
Ans: A
53. In China, this mushroom is treated as curing medicine for major ailments:-
A. Ganoderma lucidum
B. Lentinula edodes
C. Amanita muscaeria
D. Amanita phalloides
Ans: A
54 Spray of urea on fallen dead leaves is a poomising control for the following fruit disease:-
A. Die back of mango
B. Apple scab
C. Anthracnose of banana
D. Stem end rot of mango
Ans: B
55 Incubation of microbial cultures can be done at lower and higher temperatures then the room temperature in an equipment called as –
A. Deep freezer
B. Incubator
C. Biological oxygen demand incubator
D. Growth chamber
Ans: C
56 You have to isolate Curvularia from the maize leaves where, it cause leaf spots which media you will prefer to use :-
A. Nutrient Agar
B. Potato dextrose Agar
C. Complete medium
D. Richard's medium
Ans: B
57. In laminar - air flow cabinet, a burner and air blower is fitted for the purpose of :-
A. Burning culture and air circulation
B. To make the inoculation needle aseptic and fresh air circulation
C. To make the inoculation needle asptic and to avoid the heat through circulation
D. to make the isolation free from contaminants and circulation of fresh air through filters
Ans: D
58. Counting of colonies of bacteria/fungi/Actinomycetes can be done by using:-
A. Hand lens
B. Stereo microscope
C. Compund microscope
D. Colony counter(Digital)
Ans: D
59 Isolation and maintenance of the culture fo citrus canker bacteria Xanthomonas campestris pv.citri can be best done on the meida:-
A. Chalk agar
B. Nutrient agar
C. YEMA medium
D. Martin Agar medium
Ans: B
60 Mycoplasma diseases can be controlled by using a specific antibiotic to which these are sensitive :-
A. Oxytetracycline
B. Streptocycline sulphate
C. Agrimycine
D. Tetracycline
Ans: D
61 Cultural method of disease management includes:
A. Deep ploughing, weed removal, crop debris destruction, balanced fertilizer application etc.
B. Seed treatment, soil drenching by fungicides/pestricides, weed removal etc.
C. Foliar spray, weed removal, balance fertilizer,application and timely irrigation.
D. FYM application with neemcake powder, mulching, seed treatment and foliar spray.
Ans: A
62. Exlusion of disease/ pathogen inoculum is an important and vital task which can be done by :
A. Soil treatment , foliar application of fungicides & weedicides .
B. Seed treatment, seed certification, quarantine regulation .
C. Soil amendments, fertilizer doses in splits and weed management .
D. Soil health check, regular monitoring and application of fungicides.
Ans: B
63. In case of downy mildew diseases where, primary infection occurs , the removal of infection seedling helps in :
A. Checking spread of secondary infection and disease severity remain low.
B. Total eradication of the disease.
C. Loss in the disease developing sources .
D. There will not be any effect on severity of the disease.
Ans: A
64 The aim of crop rotation is :-
A. Changing the crop sequence.
B. Replacing the earlier crop with more valuable crop.
C. Growing non-host crop.
D. Planning for an orchard
Ans: C
65 In Rajasthan, mejority of virus diseases on crops are :-
A. Graft transmitted
B. Seed transmitted
C. Thrips transmitted
D. Aphid transmitted
Ans: D
66. Which of the virus in the following virus diseases is thermostable :-
A. Papaya leaf curl virus .
B. Tobacco mosaic virus
C. Banana bunchy top virus .
D. Cucumber mosaic virus.
Ans: B
67 Powdery mildew of cucurbits caused by Erysiphe cichoracearum was introdused in Indian in 1910 from:-
A. Bangladesh
B. Japan
C. Netherlands
D. Sri lanka
Ans: D
68. Directorate of plant protection and Quarantine has the role of preventing infected plant materials from :-
A. Airports, Sea ports
B. Air ports,Sea ports and land frontiers(entry & exit points )
C. All airports, sea ports and highways
D. Only at selected points of entry
Ans: B
69 "For every Avirulent gene in pathogen , there is dominent corresponding Resistance gene in the host" was concluded by :-
A. Vander Plank, 1962.
B. H.H.Flor,1956
C. Stakman,1958
D. Webster,J.,1959
Ans: B
70 These are low molecular weight protein compounds produced in response of infection or aboitic stress:-
A. Elicitors
B. PR-proteins
C. Antigens
D. Phytoalexins
Ans: D
71 This kind of resistance does not last long in crop varieties and can be broken with virulent races of pathogen:
A. Vertical resistance
B. Horizontal resistance
C. Cytoplasmic resistance
D. Biochemical resistance
Ans: A
72 The hyphal organ which gives or exerts pressure on host surface for penetration into host is called as :-
A. Penetration peg
B. Appressoria
C. Germ tube
D. Haustoria
Ans: A
73 To cover larger area in less time to spray, fungicide/pesticide/micronutrient solution, which type of sprayes would be proper :-
A. Low volume sprayer
B. High volume sprayer
C. foot sprayer
D. Low volume power sprayer
Ans: D
74 To study the structure of viruses, electron microscope is required which was first designed and invented by:-
A. Robert Hook,1863
B. Ernst Ruska,1931
C. Lamark and Trevinarus,1802
D. MC Kinney,1929
Ans: B
75. Green ear disease of Bajra is one of the important disease in Rajasthan and its causal organism is :-
A. Claviceps purpurea
B. Sclerospora sp.
C. Peronosclerospora heteropogoni
D. Sclenrospora graminicola
Ans: D
76 According to Agroclimatic zones Zone IV 'a' and IV 'b' have maize crop as a major crop in Kharif season, Which are these areas and important economic disease of maize:-
A. Kota, Bundi, jhalawar- Bounded leaf & sheath blight
B. bharatpur, Karauli & Sawai Madhopur- curvularia spot
C. Udaipur Banaswara, Dungerpur-Stock rot of maize
D. Bikaner, Jodhpur, Jaisalmer Maydis leaf blight
Ans: C
77. Powdery mildew genera are differentaited on the basis of :-
A. Oospores and their shape
B. conidial production pattren
C. Cleistothecial appendages
D. Sporangial production
Ans: C
78 An important pathogen which causes sheath blight of rice and banded leaf and sheath blight in maize is Rhizoctonia solani and this is :
A. Mycelial, non sporeforming, sclerotial and infection through cushion.
B. Conidial, asexual reproduction, sclerotial and infection peg.
C. Oosporic, soil borne , appressorial mode of infection
D. Zoosporic, sporangial, seperate mycelium & direct penetration.
Ans: A
79 Ber is an important fruit crop of rajasthan, but powdery mildew causes loss in the chlorophyll area and ultimately affects production The causal organims is :
A. Oidium erysiphoides
B. Erysiphe polygoni
C. Leveilula taurica
D. Sphaerotheca roleana
Ans: A
80 Coriander is important spice crop of Kota, Jhalawar and Baran districts but Protomyces macrosporus causes severe losses. The Name of the disease:-
A. Blight of coriander
B. root rot of coriander
C. Necrosis of coriander
D. Stem gall of coriander
Ans: D
81 Biocontrol agents like Trichoderma viride and T. harzianun can kill the soil borne pathogen propagules like Oospores, chlamydospore, sclerotia etc. How it can be applied to soil:
A. Mixing 20 kg of Trichoderma formulation in soil.
B. Incubination of 100 kg FYM using 2 kg Trichoderma formulation and then adding to soil.
C. Mixing the Trichoderma formulation along with fertilizer application.
D. Furrow application of Trichoderma formulation.
Ans: B
82. There is increased focus on organic farming these days, if you have to control diseases in such fields the options are:
A. Seed treatment and foliar application of fungicides.
B. Seed treatment with biocontrol agent and application of fungicides as foliar spray.
C. Seed treatment with fungicide and furrow application of bio - agents.
D. Seed treatment with bio agent and foliar spray of botanicals like neem, kalmegh etc.
Ans: D
83 The latest and most sensitive technique for the diagnosis of plant pathogens within shortest possible time based on molecular approaches: -
A. Bio- PCR
B. ELISA
C. Serological diagnosis
D. Real time- PCR
Ans: D
84 Which enzymes are extremely important in pathogenesis because they provide the pathogen chemical means of entrance into the host :-
A. Hydrolytic enxymes .
B. Only cutinases .
C. Proteinases
D. Peroxidases
Ans: A
85. The reserve food material in Oospores or sexual spores in major quantity is :-
A. Glycoproteins
B. Glycogens
C. Glucose + protein
D. Galactosse and nucleoproteins
Ans: B
86 Inactvation of pathogen enzymes by host is carried out fromation of :-
A. Antienzymatic protein substances
B. formation of barriers like Tyloses
C. Production of phenolic substance like poly phenol oxidases
D. Production of toxins by the pathogens
Ans: C
87 To measure the leaf spot diseases like Cercospora leaf spot, a rating scale popular in India is:-
A. 1-10 rating scale
B. 1-5 rating scale
C. 0-9 rating scale
D. 0-4 rating scale
Ans: B
88 To screen the varietal line against downy mildew pathogens , the popular method of inoculation is :
A. Spray inoculation of conidia10³/ml.
B. Wound inoculation by suspension of cnidia
C. Tooth pick inoculation technique.
D. Sick plot technique.
Ans: D
89. A farmer comes to you with few fungal diseased plants. How you will process to give him precise solution :
A. Suggesting fungicide on the basis of symptoms.
B. Diagnosis of the pathogen and suggesting specific fungicide .
C. On the basis of severity you will suggest precautionary measures.
D. Suggesting systemic fungicide to avoid further damage.
Ans: B
90 In India if you want to get a pathogen culture identified authentically, which agencies /institutes you will contect:
A. Central Institutes of that particular crop
B. IARI and its regional stations.
C. Taxonomist and senior Faculty in the universities
D. ITCC ,IARI New Delhi, NBAIM at Mau, UP.
Ans: D
91 Based on environmental parameters, the computer simulations model "EPIVEN" was made for forecasting of the disease:-
A. Vein clearing of tobacco
B. Blossom blight of apple.
C. Southern leaf blight of maize
D. Apple scab.
Ans: D
92. Based on the available data of disease ratings, which formula you will use to calculate percent disease Index:
A. (Number of infected plants / Total no. Of plants observed) X 100
B. (Sum of the ratings/ Total plants/leaves) X 100
C. (Area of plant tissue infected / Total area) X 100
D. (Sum of the individual ratings/ Total no. Of plant/leaves observed) X (100/Maximum disease rating)
Ans: D
93. The most popular ediable mushroom in the world is (with it scientific name ):
A. Agaricus bisporus (button mushroom)
B. Pleurotus sajor-caju(Oyster mushroom)
C. Morchella Spp.(Button mushroom)
D. Phellorinia inquinaus (khumbi)
Ans: A
94 In India , the best substrate for spawn production of mushroom is:-
A. Pearlmillet grains
B. Sorghum grains
C. Rice and rye grains
D. wheat grains.
Ans: D
95 Highly priced mushroom Morchella which is called as "Gucchi" comes under the phylum:-
A. Zygomycota
B. Ascomyeota
C. Basidiomycota
D. Qomycota
Ans: B
96 Mushroom which is a popular medicinal mushroom and treated as anti-cancer and is being used worldwide:-
A. Schizophyllum commune
B. Lentinula edodes
C. Grifolla frondosa
D. Tricholoma Sp.
Ans: B