Ovipositor lure used for rice stem borer is

Answer: Option B

Ovipositor lure used for rice stem borer is Para methyl acetophenone.
Oviposition lures are natural chemical substances that control the selection of sites for oviposition by the adult female. By using these chemicals, adult female insects can be lured to lay an egg in an undesirable place where their larvae will die due to wanting food.
Methylacetophenone is an aromatic ketone. 4'-Methylacetophenone is a natural product found in Cichorium endivia, Myrocarpus frondosus, and other organisms.