CONTENTS 



Object of comparative tests, ........ 



Delayed dormant period indicative of complete hatching of aphid eggs, 

 Object of delayed dormant spraying, ...... 



Comparative tests for the destruction of aphid eggs under laboratory con 

 ditions, ......... 



Discussion of results, ........ 



Action of lime-sulfur and miscible oils upon the aphid eggs, . 

 Comparative tests for the destruction of the living apple aphids. 



Discussion of results, ........ 



Efficiency of lime-sulfur against the aphids, .... 



Action of lime-sulfur upon the aphids, .... 



Foliage injury by lime-sulfur, ...... 



Efficiency of lime-sulfur and nicotine sulfate combined against the 

 aphids, .......... 



Action of the lime-sulfur-nicotine-sulfate combination upon the 

 aphids, .......... 



Foliage injury by the lime-sulfur-nicotine-sulfate c 

 Efficiency of miscible oils against the aphids. 

 Action of miscible oils upon the aphids. 

 Foliage injury by miscible oils, . 



Conclusions, ....... 



Acknowledgments, ...... 



Bibliography, ...... 



ombination. 



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Publication of this Document 



approved by the 

 Supervisor of Administration. 



