70 SCIENTIFIC REPORTS OF THE AGRICULTURAL RESEARCH 



At Bankura, stubbles collected from the neighbourhood 

 of the town as well as from the villages in the interior show- 

 ed about 22 per cent, infestation by borers. In about 1,000 

 Btubbles examined the following were found : — 



Schoenobius bipunctifer . . . .12 



Chilo simplex . . . . . .9 



At Cuttack, stubbles collected from all over the Farm 

 exhibited only 9 per cent, damage by borers. From about 

 900 stubbles the following were obtained : — 



Schoenobius bipunctifer . . .3 



Chilo simplex . . . . . .3 



Chilo oryzce . . . . . . #> . 5 



Sesamia inf evens . . . . . .3 



From many of the experimental plots on the Cuttack 

 Farm the crop was not yet harvested and some of these plots 

 (each l/5th acre in area) showed an unusually high propor- 

 tion of dry ears. For instance, in two plots, one of a 

 variety known as khura and the other of kukrajota, the 

 number of dry ears was as high as 20 per cent., whilst in 

 neighbouring plots under the same varieties of paddy the 

 damage was much less than half that in the two plots men- 

 tioned. From the khura plot referred to 100 affected plants 

 were pulled out from all over it and of these 40 were not 

 damaged by insects whilst the remaining 60 exhibited 

 damage by borers, of which the following were found : — 



Schoenobius bipunctifer s . ' • • . -30 



Chilo simplex . . . . . .8 



Sesamia inf evens . . . . . .2 



Out of 100 affected plants similarly picked from the 

 kukrajota plot, no less than 92 were found damaged by 

 borers and the following borer larvas were obtained from 

 (hem, viz.: — 



Schoenobius bipunctifer . . . . .30 



Chilo simplex . . . . . .38 



Chilo ovyzce \ . . . . . .2 



Sesamia inf evens ...... 1 



