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Hydroponic Gardening
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21.
Black stem rust of wheat caused by:
A. Puccinia graminis tritici
B. Puccinia recondita
C. Puccinia striformis
D. Ustilagotritici
Answer: A
Explanation:
22.
Black tip of mango is caused by:
A. Phythium
B. Phytosynthetas
C. Boron deficiency
D. Zinc deficiency
Answer: C
Explanation:
23.
Blast of rice is caused:
A. Xanthomonas
B. Drechslera oryzae
C. Pyricularia
D. Cercospora
Answer: C
Explanation:
24.
Plant Pathology is ____ word.
A. English
B. Latin
C. Greek
D. Mandarin
Answer: C
Explanation:
25.
Bordeaux mixture was discovered by P.A. Millardet of France during the year 1882 following his chance observation of farmer's practice for protection against:
A. Plasmopara viticola on grapevine
B. Uncinula nectar on grapevine
C. Podosphaera leucotricha on apple
D. Venturia inequalis on apple
Answer: A
Explanation:
26.
Botulism is caused by species of:
A. Bacillus
B. Pseudomonas
C. Agrobacterium
D. Clostridium
Answer: D
Explanation:
27.
Brown spot of maize is caused by:
A. Sclerospora sorghi
B. Physoderus zeamaydis
C. Alternaria solani
D. Cercospora perfonats
Answer: B
Explanation:
28.
By 1857, Barkley and Schacht discovered root knot nematodes and cyst nematode in:
A. Sweet sorghum
B. Sugarcane
C. Potato
D. Sugarbeet
Answer: D
Explanation:
29.
Carborundum powder is:
A. Silicon carbide
B. Aluminium oxide
C. Diatomaceous earth
D. Calcium carbonate
Answer: A
Explanation:
30.
Cocci are:
A. Spiral shaped
B. Spherical shaped
C. Rod shaped
D. None of the above
Answer: B
Explanation:
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