581 XEW JERSEY AGRICLTLTURAL COLLEGE 



Tho sjunjilo received was mixed with water, as directed, and 

 remained suspended in llocciilent particles, which sank slowly to 

 tho bottom. It was painted on the branches of an infested plum 

 tree in an orchard and some of the foliage was wet with it to de- 

 termine its action upon leaves. Two weeks later examination was 

 made by ^Ir. Dickerson and neither foliage nor scales had been in 

 the least affected. 



A large supply of antidin has been ordered and experiments 

 will be continued in 1907, on snbterranean species at least. 



Killarvae. 



This is a material primarily intended for the destruction of 

 mosquitoes and their larvae, but from its composition it seemed as 

 if it might possibly have a wider range. It consists of two pow- 

 ders, which if combined in water produce ammonia in sufficient 

 quantity to be unpleasantly apparent. A reference to the section 

 of this report dealing with mosquito matters will show that imder 

 some conditions the material was decidedly eifective, and it was 

 believed that it miiiht be similarlv useful as against root-mao-o-ots, 

 while the ammonia produced might be of direct use to the plants. 

 Unfortunately the manufacturer delayed sending in the supply 

 ordered until the maggots had almost disappeared, and it was im- 

 possible to make any satisfactory tests. A large supply is now 

 actually in hand, however, and will be used next season, if no un- 

 foreseen contingencies prevent. 



To test the nuiterial on foliage, sprayed, on May 24th, some 

 branches of maple trees near the lalx^ratory. ^Mlen the mixture 

 was made a strong odor of ammonia was apparent, and the first 

 lot was sprayed out without stirring. It developed in the process 

 that the powders sank to the bottom quite rapidly, so that toward 

 the end the spray was quite a thick mass. The second mixture 

 was kept stirred while the spraying was done. 



]\fay 29th, the foliage sprayed with the first lot was somewhat 

 burned where the material was thick, but had not been harmed 

 where the beginning was made. The spraying done with the 

 second lot, Avliich was kept stirred, had hurt nothins:; evidently it 

 was the settling's that had caused the mischief. 



August 4tli, ^Ir. Dickerson made u]"> a package of the material 



