Question:
In mulberry silkworm Grasserie is caused by:
In mulberry silkworm Grasserie is caused by:
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Grasserie is synonymous with Nuclear Polyhedrosis Virus (BmNPV) in silkworms. It is characterized by swollen intersegmental membranes and milky hemolymph.
Updated On: Aug 18, 2026
- BmNPV
- CPV
- IFLV
- Densovirus
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Grasserie (also known as nuclear polyhedrosis) is one of the most common and economically damaging viral diseases in the rearing of the mulberry silkworm, Bombyx mori.
Step 2: Detailed Explanation:
The disease is caused by BmNPV (Bombyx mori Nucleopolyhedrovirus), which is a double-stranded DNA virus belonging to the family Baculoviridae.
Infected larvae become hyperactive, their skin becomes fragile and easily ruptures, and they exude a milky white hemolymph rich in polyhedral inclusion bodies.
Step 3: Final Answer:
Grasserie is caused by BmNPV, which corresponds to option (A).
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