Q. The microorganism used in brewing industry is:
Answer: Yeast
Q. The nematode Radopholus similis shows maximum population at soil depth of:
Answer: 20–30 cm
Q. Organisms included in order Peronosporales cause:
Answer: Downy mildew
Q. Organisms lacking a well-defined nucleus are called:
Answer: Prokaryotes
Q. Plant disease caused by algae is:
Answer: Red rust of tea
Q. Disease responsible for Great Bengal Famine (1943) was:
Answer: Brown leaf spot of rice
Q. Mycoplasmal plant diseases are transmitted by:
Answer: Leaf hoppers
Q. Important diseases of sugarcane include:
Answer: Red rot and grassy shoot
Q. Tilletia causes:
Answer: Bunt
Q. Dithane Z-78 belongs to group:
Answer: Dithiocarbamic acid
Q. Tobacco mosaic virus was first reported by:
Answer: Mayer
Q. TMV was crystallized by:
Answer: Stanley
Q. Tolyposporium penicillariae causes:
Answer: Bajra smut
Q. Tomato leaf curl disease is caused by:
Answer: Virus
Q. Transduction occurs in:
Answer: Bacteriophages
Q. Transformation occurs in:
Answer: Bacteria
Q. Trichodorus belongs to family:
Answer: Trichodoridae
Q. Tundu disease is caused by:
Answer: Anguina and Corynebacterium
Q. Virus filterability was proved by:
Answer: Ivanowski
Q. Ufra disease of rice is caused by:
Answer: Ditylenchus
Q. Leaf curl of tobacco is caused by:
Answer: Nicotina virus-10
Q. Uncinula causes:
Answer: Powdery mildew
Q. First use of lens to study microorganisms was by:
Answer: Antony van Leeuwenhoek
Q. Virus transmitted by nematode is:
Answer: Xiphinema
Q. Father of nematology is:
Answer: N. A. Cobb
Q. Under unfavorable conditions bacteria form:
Answer: Endospores
Q. Cellulose-decomposing fungi include:
Answer: Trichoderma and Aspergillus
Q. Aflatoxin is produced by:
Answer: Aspergillus flavus
Q. Soil pathogenic fungi are suppressed by:
Answer: Trichoderma viride
Q. Citrus nematode is:
Answer: Tylenchus
Q. Sulphur bacteria is:
Answer: Cladothrix
Q. Root-knot nematode is:
Answer: Meloidogyne
Q. Carbamate nematicide is:
Answer: Aldicarb
Q. Nematode attacking aerial plant parts is:
Answer: Anguina
Q. Nutrient supplied by mycorrhiza is:
Answer: Phosphorus
Q. Gram-positive bacterium is:
Answer: Corynebacterium
Q. Poisonous mushroom is:
Answer: Amanita
Q. Period between inoculation and symptom appearance is:
Answer: Latent period
Q. Systemic fungicides include:
Answer: Vitavax, Bavistin, Calixin
Q. Shape of nematode body is maintained by:
Answer: Pseudocoelomic fluid
Q. Downy mildew fungus is:
Answer: Sclerospora
Q. Best control of ear-cockle disease of wheat is:
Answer: Mechanical separation by flotation
Q. Spreading decline of citrus is caused by:
Answer: Nutritional deficiency
Q. Correct infection mode of ergot of bajra is:
Answer: Local infection of blossom
Q. Correct biocontrol sequence is:
Answer: Parasite → Mass rearing → Release → Parasitism
Q. Incorrectly matched pair is:
Answer: Karnal bunt – Neovossia horrida
Q. Correctly matched crop–disease pair is:
Answer: Cucumber – Club root
Q. Failure of sprayer to retain pressure is corrected by:
Answer: Tightening lid and replacing gasket
Q. Lowest spray volume sprayer is:
Answer: Hand sprayer
Q. Economic threshold level means:
Answer: Level to prevent economic injury
Q. Alternate host is:
Answer: Host needed to complete life cycle
Q. Best tissue for virus-free potato is:
Answer: Meristem tip
Q. Symbiotic relationship example is:
Answer: Rhizobium
Q. First reported plant bacterial disease was:
Answer: Fire blight of apple
Q. Whip smut of sugarcane is caused by:
Answer: Ustilago scitaminea
Q. White rust of crucifers is caused by:
Answer: Albugo
Q. Antibiotics were discovered by:
Answer: Alexander Fleming
Q. Alexander Fleming discovered penicillin in:
Answer: 1929
Q. Coffee rust is caused by:
Answer: Hemileia vastatrix
Q. Conidia and sporangia are produced by:
Answer: Fungi
Q. Viruses were crystallized by:
Answer: Stanley
Q. Cysts are formed by:
Answer: Meloidogyne
Q. Necrosis in plants means:
Answer: Death of tissue
Q. Phyllody in sesame is caused by:
Answer: Mycoplasma-like organism
Q. Dithane M-45 is a:
Answer: Fungicide
Q. Wart of potato is under:
Answer: Domestic quarantine
Q. Downy mildew of maize is caused by:
Answer: Peronosclerospora sacchari
Q. Five-kingdom classification was proposed by:
Answer: Whittaker
Q. Brewing industry microorganism is:
Answer: Yeast
Q. Black stem rust of wheat is caused by:
Answer: Puccinia graminis tritici
Q. Blast of rice is caused by:
Answer: Pyricularia
Q. Bordeaux mixture controls:
Answer: Plasmopara viticola of grapevine
Q. Botulism is caused by:
Answer: Clostridium
Q. Brown spot of maize is caused by:
Answer: Physoderus zeae-maydis
Q. Carborundum powder is:
Answer: Silicon carbide
Q. Cocci bacteria are:
Answer: Spherical shaped
Q. Bacilli bacteria are:
Answer: Rod shaped
Q. Peritrichous flagellation means:
Answer: Flagella all around the cell
Q. Jute and cotton are:
Answer: Fibre crops
Q. Headquarter of UNHCR is:
Answer: Geneva
Q. Number of sugar carbons in DNA is:
Answer: Five
Q. Abscisic acid is related to:
Answer: Plant growth regulation
Q. Agar-agar is obtained from:
Answer: Gelidium
Q. Albugo is:
Answer: Obligate parasite
Q. Penicillin was discovered by:
Answer: Alexander Fleming
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