Plant Pathology

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. GranularD. Fungiments

The insecticides with longest residual effect belongs to___________________? A. Pyrethroid B. CarbamatesC. Organo-chlorine D. Organio-phosphate

Organo-chlorine insecticides includes___________________? A. DDT B. Aldrin and Diehydrin C. Aindone and HeptachlorD. All the above

Blast disease is an international disease of________________? A. Wheat B. Sugarcane C. CottonD. rice

Gummosis is the disease of_________________? A. Mango B. GuavaC. Citrus (Lemon) D. none

Leaf spot or tikka is the disease of____________________? A. Soybean B. SunflowerC. Ground nuts D. none of these

Which one of the following is polyphagus insect__________________? A. American boll worm B. Whitefly C. AphidsD. A

The major viral disease of cotton is____________________? A. Cotton boll rot virus B. Cotton stem crinkle virusC. Cotton leaf curl virus D. None of the above

Bombyx morri is the name of___________________? A. Lady bird beetleB. Silk worm C. Honey bee D. None of the above