Most of the plant parasitic nematodes belong to the order:
A) Tylenchida
B) Dorylaimida
C) Aphelenchida
D) Rhabditida
Nematode genus Hoplolaimus Daday was first recorded in from an island in the Paraguay River:
A) 1900
B) 1905
C) 1910
D) 1915
Phycomycetes belong to:
A) Fungi
B) Bacteria
C) Yeast
D) None of the above
Primary source of infection to green ear disease of bajra is:
A) Insect
B) Soil
C) Air
D) Seed and soil
Red scales of (red varieties) contain protocatechuic acid and catechol, which may exude in drops to resist the attack of Colletotrichum circinans:
A) Garlic
B) Onion
C) Leek
D) Celery
Stripe disease of barley is caused by:
A) Drechslera gramineum
B) Drechslera oryzae
C) Puccinia striiformis
D) None of the above
The term commensalism shows:
A) Living together of two species, one of which is benefited by the association, while the other is neither beneficial nor harmful
B) Living together of two or more species of organisms for mutual benefit
C) The joint action of the two organisms on a carbohydrate, resulting in the production of gas that is not formed by either organism cultivated separately
D) Living together of two organisms which are harmful to each other
Striga is a plant parasite included in:
A) Fungi
B) Mycoplasma-like organisms
C) Phanerogamic plant parasites
D) Bacteria
The shape of bacterial cells is:
A) Spheres
B) Spiral
C) Rods
D) All of the above
Smut of wheat is effectively controlled by:
A) Bavistin
B) Vitavax
C) Benelate
D) Thiram
Strawberry plants infected with P. penetrans (nematode) have been successfully treated with exposure to hot water at:
A) 49.4°C for 17.5 min.
B) 52.8°C for 6 min
C) 54.5°C for 4 min.
D) 56°C for 2 min
The two important diseases of sugarcane include:
A) Little leaf and bacterial wilt
B) Red rot and grassy shoot
C) Red rot and bund
D) Bakanae disease and stem canker
Uncinula causes the disease:
A) Downy mildew
B) Powdery mildew
C) Blight
D) Wilt

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