34 BULLETIN 156, IT. S. DEPAETMEXT OF AGKICULTURE. 



had been stiffened by frost in the fall, and which was so badly in- 

 fested the following spring that the crops were absolutely destroyed. 

 The fatality to the beetles caused by the destruction of the pupal 

 cell in the fall has been apparently somewhat overdrawn. In our 

 cages at the field station at Hagerstown, Md., we had, in March, 1914, 

 many adults of Agriotes mancus alive in cages wherein they were 

 subjected to outdoor weather conditions. These adults were removed 

 from their pupal cells during September, 1913. 



Two other remedial measures have been suggested from time to 

 time, the first of which is trapping the larva? in potato and other 

 vegetable baits and hand killing; the second is killing the adults 

 with poisoned bait of several kinds — clover, sweetened liquids, bran 

 mash, potatoes and other vegetables, and rape cake. Miss Ormerod 

 found a true rape-seed cake quite useless, but reports 1 " Kurrachee 

 cake," made from mustard seed, as killing the larva? which fed 

 upon it. These methods have been found very inefficient, and even 

 yvere they successful in killing the insects they would be impractical 

 so far as the extensive cereal and forage crops are concerned. 



1 Proc. Ent. Soc. London, 1882, p. xix. 



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