About Lesson
Viruses
- More than 20 groups of viruses are known to be insect pathogens.
- They have been placed in 12 viral families, but many remain unclassified.
- Viruses specific for insects and related invertebrates are: Baculoviridae, Polyanaviridae, and Ascoviridae.
Subgroups of Baculoviridae
Baculoviridae had 3 subgroups.
i. Nuclear polyhedrosis (nucleopolyhedrosis) viruses (NPVs)
- Viruses after entering an insect attack on midgut cell, break the cell of the midgut cell and release it to hemolymph.
- Insects turn into milky or white color and insects show less appetite, climbing away, far away from food.
- It is used to control alfalfa Caterpillar, cabbage looper, tobacco caterpillar, Gram pod borer, and soybean looper, Diamondback month.
ii. Granulosis viruses (GVs)
- It is used to control Potato tuber months, Codling moths, etc.
iii. Nuclear viruses (NOVs): non-osculated rod shaped
