A. Trachea
B. Spines
C. Secretion
D. Nervous system

A. 1-2 nymphs/leaf
B. 2-3 nymphs/leaf
C. 3-4 nymphs/leaf
D. 1 nymphs/leaf

A. Pyrethroid
B. Carbamates
C. Organo-chlorine
D. Organio-phosphate

A. DDT
B. Aldrin and Diehydrin
C. Aindone and Heptachlor
D. All the above

A. Wheat
B. Sugarcane
C. Cotton
D. rice

A. Mango
B. Guava
C. Citrus (Lemon)
D. none

A. Soybean
B. Sunflower
C. Ground nuts
D. none of these

A. American boll worm
B. Whitefly
C. Aphids
D. None of these

A. Cotton boll rot virus
B. Cotton stem crinkle virus
C. Cotton leaf curl virus
D. None of the above

A. Lady bird beetle
B. Silk worm
C. Honey bee
D. None of the above