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Pupa of Rice stem borer ( Tana bedhak )

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1. Pupation takes place inside the rice stem, straw or stubble. Before pupation it make a exit hole in the internode and covers it will a thin web for the adult to come out later.
2. The anterior extremity of the cocoon is tubular and attached to the exit hole and to make the cocoon waterproof the larva webs two horizontal septa in this tubular area.

File Courtesy: 
BAU Ranchi
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