744 



PROCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 



D. — Pusa No, 106, 1 lb. in stoppered glass jar : — 



15th May 1916 . . 20 live weevils put in.' 



6th July 1916 . . Unaffected ; 20 dead weevils picked out. 



4th December 1916 . Unaffected. 



15th March 1917 . • Unaffected ; 20 weevils put in. 



22nd January 1918 . 484 weevils picked out. Benzine had been applied to 



stupefy the weevils. 

 Sth November 1918 . 58 weevils picked out. Weight left=l lb. Grains in 



good condition except that they are bored. They are 



not decomposed and do not emit any smell. Can be 



used. 

 15th March 1917 to 22nd January 1918, the weevils multi- 



In about 10 months, from 

 plied about 24 times. 



E. — Black-awn, 1 lb, 



15th May 1916 

 6th July 1916 



4th December 1916 

 15th March 1917 . 

 22nd January 1918 

 7th November 1918 



18th February 1919 



In about 10 months, from 

 plied about 49 times. 



in stoppered glass jar : — 



20 live weevils put in. 



Wheat unaffected, 19 dead weevils picked out and 1 not 



traceable. 

 Unaffected. 



Unaffected ; 20 weevils put in. 

 Affected ; 984 weevils picked out. 

 36 weevils picked out. 

 Grains are in good condition except that they are bored. 



Not at all decomposed and do not emit any smell.. 



Can be used. Weight after sieving 15^ oz. 

 No weevil found. The above pickings cleared them 



off and apparently there were none left to breed. 



Benzine had been applied at the time of the above 



pickings to stupefy the weevils. 

 15th March 1917 to 22nd January 1918, the weevils multi- 



Ex'periment XI. 

 This experiment was undertaken to see if the grains, when artificially 

 dried, were more liable to be attacked by insects. 

 A. — Pusa No. 6 : — 



1 lb. dried down to 0° moisture. Weight reduced to 

 14 oz. 165 grains. 14 oz. kept in stojipered jar which 

 is occasionally opened, thus allowing the grains to 

 absorb moisture from the atmosphere. 



20 weevils put in. 



Unaffected; all the 20 weevils picked out dead. Weight 

 14 oz. 100 grains. Grains spread out for 1 hour after 

 which weight=14 oz. 200 grains. 



Unaffected ; 20 weevils put in. 



Unaffected ; 20 dead weevils picked out. 



Unaffected. Weight 14| oz. Left spread out exposed- 

 till morning of 6th May 1918 when weight=15 oz. 

 Put back in the stoppered jar with 40 weevils. 



Unaffected ; 37 weevils dead. 



Unaffected. All weevils dead. Weight 15 oz. The 

 germinating power of the grains was lost. 



13th-14th May 1916 



15th May 1916 

 6th July 1916 



15th March 1917 . 

 21st January 1918 

 5th May 1918 



Sth November 1918 

 ISth Febmary 1919 



