BULLETIN No. 184 JULY, 1918 



MASSACHISETTS 

 AGRICILTIRAL EXPERIMENT STATION 



Late Dormant versus Delayed Dormant 



or Green Tip Treatment for the 



Control of Apple Aphids 



By W. S. REGAN 



This bulletin reports the results of comparative tests in the 

 laboratory with commercial lime-sulfur and miscible oils for the 

 destruction of apple aphid eggs at the late dormant period, and 

 experiments with these materials and lime-sulfur-nicotine-sulfate 

 combination for destroying the living aphids at the delayed dor- 

 mant or green tip period. Observations on the extent of foliage 

 injury under both laboratory and field conditions, and the manner 

 in which these insecticides kill, are also made. 



Requests for bulletins should be addressed to the 



Agricultural Experiment Station 



Amherst, Mass. 



