Which one of the following is disease of wheat ______?
A. Leaf rust
B. Strip rust
C. Loose rust
D. All the above
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
Root knot disease is caused by _______?
A. Fungi
B. Nematodes
C. Virus
D. Bacteria
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
The entrance point for air in insects are known as ______?
A. Trachea
B. Spines
C. Secretion
D. Nervous system
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
Formulation or insecticides is _______?
A. Dust
B. EC
C. Granular
D. Fungiments
The insecticides with longest residual effect belongs to _____?
A. Pyrethroid
B. Carbamates
C. Organo-chlorine
D. Organio-phosphate
Organo-chlorine insecticides includes ________?
A. DDT
B. Aldrin and Diehydrin
C. Aindone and Heptachlor
D. All the above
Blast disease is an international disease of _____?
A. Wheat
B. Sugarcane
C. Cotton
D. rice
