744 



'liOCEEDINGS OF THE TIlIliD ENTOMOLOGICAL MEETING 



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

 20 live weevils put in. 

 Unaffected ; 20 dead weevils picked out. 



15th May 1916 

 6th July 1916 

 4th December 1916 

 15th March 1917 . 

 22nd January 191S 



8th November 1918 



In about 10 months, from 

 plied about 24 times. 



E.— Black-awn, 1 lb, 

 loth 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. 



Unaffected. 



Unaffected ; 20 weevils put in. 



484 weevils picked out. Benzine had been applied tcv 



stupefy the weevils. 

 58 weevils picked out. Weight left= 1 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 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 J 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 £he weevils. 

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



This experiment wa 

 dried, were more liable 

 A.— Pusa No. 6 :— 

 13th-14th May 1916 



15th May 1916 

 6th July 1916 



15th March 1917 . 

 21st January 1918 

 5th May 1918 



8th November 1918 

 18th February 1919 



Experiment XI. 

 i undertaken to see if the grains, when artificially 

 to be attacked by insects. 



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



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



is occasionally opened, thus allowing the grains ta 



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 14J 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. 



