BULLETIN No. 177 OCTOBER, 1917 



MASSACHUSETTS 

 AGRICULTURAL EXPERIMENT STATION 



Potato Plant Lice and their 

 Control 



By W. S. REGAN 



This Bulletin is a report on a serious outbreak of potato 

 plant lice in Massachusetts during the summer of 1917, together 

 with details of injury, identification, life cycle and natural 

 factors influencing the destructiveness of the pest, experiments 

 with various insecticidal materials and apparatus, and recom- 

 mendations for control. 



Requests for bulletins should be addressed to the 



Agricultural Experiment Station, 



Amherst, Mass. 



