Agriculture MCQs

2794 MCQs  (Page 7 of 280)

The economic injury level for white fly is________________?
A. 1-2 nymphs/leaf
B. 2-3 nymphs/leaf
C. 3-4 nymphs/leaf
D. 1 nymphs/leaf
Pathogen is_________________?
A. Fungi which cause disease
B. Any bacteria which causes disease
C. Any virus which causes disease
D. Any organism which causes disease
Fungi damage our crops by_________________?
A. Producing toxic substances in plants
B. Destroying green pigment of plant
C. Feeding on flowers and fruits
D. Absorption of nutrients from plant tissues