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1) Who proved that virus could pass through filters with pores small enough to retain bacteria? a. Stanley b. Ivanowski c. Mayer d. Barkley
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2) Ufra disease of rice is caused by: a. Pratylenchus b. Ditylenchus c. Aphelenchoides d. Heterodera
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3) Leaf curl of tobacco is caused by: a. Nicotina virus Ca-i b. Nicotina virus-10 c. MLO's d. Viriod
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4) Uncinuls causes the disease: a. Downy mildew b. Powdery mildew c. Blight d. Blight
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5) Used lense for the first time to study micro-organism: a. Robert Koch b. Antony Van Leeuwenhoeck c. Louis Pasteur d. Butler
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6) Virus is transmitted by nematode: a. Globodera b. Tylenchorhynchus c. Angulna d. Xiphinema
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7) Who is known as the father of nematology? a. N.A. Cobb b. G.Thorne c. F.G.W. Jones d. De-man
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8) When bacterial cells are subjected to unfavourable conditions they form: a. Oospores b. Zoospores c. Endospores d. Cyst
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9) Which are the cellulose attacking fungi at the time of decomposition of organic compound? a. Trichoderma, Aspergillus b. Ganoderma, Psalliotta c. Albugo, Puccinia d. Pythium, Macrophomina
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10) Which fungus produces aflatoxin? a. Penicillium notatum b. Aspergillus flavus c. Albugo candida d. Trichoderma viride
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11) Which fungus supresses various pathogenic fungi present in soil? a. Pythium aphanidermatum b. Psalliotta spp. c. Macrophomina spp. d. Trichoderma viride
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12) Which is citrus namatode? a. Hoplolaimus b. Pratylenchus c. Rotylenchulus d. Tylenchus
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13) Which is sulphur bacteria? a. Nitrosomonas b. Cladethrix c. Thiothrix d. Bacillus
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14) Which is the root knot nematode? a. Angunia b. Heterodera c. Meloidogyne d. Tylenchorhynchus
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15) Which of the following nematicide is a carbamate? a. DBCP b. DD c. Phorate d. Aldicarb
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16) Which of the following nematodes attack above plant parts? a. Pratylenchus b. Anguina c. Meloidogyne d. Rotylenchulus
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17) Which of the nutrient is supplied by mycorrhiza to the plant? a. Nitrogen b. Phosphorus c. Sulphur d. Iron
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18) Which of them is a gram-positive bacterium? a. Xanthomonas b. Pseudomonas c. Erwinia d. Corynebacterium
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19) Which of them is a poisonous mushroom? a. Agaricus b. Volvariella c. Peasurotus d. Amanita
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20) Which one of the following correctly define the period between inoculation and appearance of the first disease symptom? a. Penetration period b. Latent period c. Incubation period d. Infestion period
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21) Which one of the following groups consists of systemic fungicides? a. Bavistin, Topsin-M, Captan b. Plantvax, Emisan, Calisin c. Vitavax, Bavistin, Calisin d. Ziram, Plantvax, Blitox
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22) Which one of the following helps in maintaining the shape of nematodes? a. Pseudocoelomic fluid b. Cuticle and muscles c. Pseudocoelome d. Annulation of cuticle
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23) Which one of the following is known as downy mildew fungus? a. Erysiphe b. Sclerospora c. Taphrina d. Urocystis
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24) Which one of the following is the best method of controlling ear cockle disease of wheat? a. Application of solar heat b. Mechanical separation of infected seed by floatation c. Application of balanced dose of fertilizer d. Treatment of seed with pesticide
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25) Which one of the following is the cause of spreading decline of citrus? a. Citrus nematode b. Burrowing nematode c. Fungal diseases d. Nutritional deficiency
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26) Which one of the following is the correct mode of infection in Ergot of bajra? a. Shoot infection b. Local infection of blossom c. Seedling infection d. Systematic infection
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27) Which one of the following is the correct order in which they appear during biocontrol operations? a. Parasite, Release, Mass rearing, Parasitism b. Mass rearing, Parasite, Release, Parasitism c. Release, Mass rearing, Parasite, Parasitism d. Parasite, Mass rearing, Release, Parasitism
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28) Which one of the following pairs is not correctly matched? a. Karnal bunt - Neovossia horrida of wheat b. False smut - Ustilaginoidea virens of rice c. Hill bunt - Tilletia foetida wheat d. Ear cockle - Anguina tritici wheat
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29) Which one of the following pairs of crop and disease is correctly matched? a. Cabbage - Early blight b. Cucumber - Club root c. Potato - Black wart d. Tomato - White rust
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30) Which one of the following remedies is to be suggested in case of failure of a manuallyoperated sprayer to retain pressure? a. Tightening of loose nuts and clamps and replacement of gaskets b. Tightening of the lid of the tank, replacement of the gasket, if necessary c. Opening the nozzle and cleaning its various parts especially the orifice d. Straightening the plunger rod if found bent
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31) Which one of the following sprayers could require the lowest volume of spray solution to cover a hectare of rice crop? a. Power sprayer b. Foot sprayer c. Knapsack sprayer d. Hand sprayer
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32) Which one of the following statements correctly defines economic threshold level? a. The pest population level at which control measures should be taken to prevent the pest population from reaching economic injury level b. The lowest pest population density that will cause economic damage c. The optimum pest population density that will cause economic damage d. The pest population level at which application of pest control measures will be uneconomic
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33) Which of the following statements correctly defines the "alternate host" of a pathogen/parasite? a. A host on which a parasite attacks simultaneously with the main host b. A host, which grows in alternate season or year c. One of the two kinds of hosts on which a parasitic fungus develops to complete its life cycle d. A host on which, the parasite does not attack in normal conditions
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34) Which one of the following tissue is most suitable for tissue culture to produce virus free plants of potato? a. Leaf tissue b. Pollen c. Embryo-tissue d. Meristem tip tissue
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35) Which shows the symbiotic relationship? a. Rhizobium b. Azotobactor c. Clostridium d. Nitrosomonas
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36) Which was the first plant bacterial disese reported? a. Angular leaf spot of cotton b. Citrus canker c. Fire blight of apple d. Bacterial blight of tomato
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37) Whip smut of sugarcane is caused by: a. Ustilago nuda b. Ustilago hordei c. Urocystis agrophri d. Ustilago sciteminae
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38) White rust of crucifer is caused by: a. Puccinia b. Albugo c. Sclerospora d. Peronospora
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39) Who for the first time discovered antibiotics? a. Alexander Flemming b. Stanley c. Anton de Bary d. Louis Pasteur
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40) _______estimated that incompatibility occurs in more than 3,000 species among 20 families of the flowering plants: a. D. De Winton b. M.B. Hughes c. W.H. Gabelman d. E.M. East
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41) _______provides the best documented example of long time effects of selection: a. Sugarcane b. Sweet sorghum c. Sugarbeet d. Sugar maple
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42) ______ deteriorates drastically upon inbreeding: a. Carrot b. Okara c. Brinjal d. Broccoli
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43) ______ in Ladino clover is governed by two dominant alleles, one produces cyanogenic glycoside, while the other releases the enzyme to catalyze its release from gloycoside: a. Oxalic acid b. IAA c. HCN d. NAA
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44) ______ are examples of protandrous species: a. Avocados b. Walnuts c. Carrots d. None of these
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45) Origin of Species by means of Natural Selection' was given by: a. Lamark b. Linnaeus c. Charles Darwin d. Erasmus
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46) Radish' is an example of: a. Fusiform root b. Napiform root c. Conical root d. Tuberous root
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47) "Experiments in Plant Hybridization" a paper of G. Mendal was first published in the year: a. 1905 b. 1787 c. 1866 d. 1896
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48) "If a gene is represented in an infinitely large random-mating population by adaptively neutral alleles, A and a, in the ration of qA: (1-q)2 aa = 1" is known as: a. Stanford-Suneson law b. Weibe-Thomas law c. Briggs-Harlan law d. Hard-Weinberg law
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49) 2n - 1 is a: a. Monosomic b. Transonic c. Tetrasomic d. Alloploid
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50) 2n denotes: a. Number of homozygote produces by selfing a F1 b. Number of types of gametes produced by F1 c. Number of types of heterozygote produced by selling F1 d. None of the above
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