Massachusetts 

 Agricultural Experiment Station 



BULLETIN No. 261 FEBRUARY, 1930 



Ecological Studies of the Mexican 

 Bean Beetle 



By Harvey L. Sweetman and H. T. Fernald 



Since 1921 the Mexican bean beetle has spread from its native habitat, 

 the Southwest, over most of the East where it has also been very injurious 

 to the bean crop. During 1929 it was found for the first time in Con- 

 necticut and Massachusetts. A study of temperature and moisture condi- 

 tions necessary for the development of the insect is here used in an attempt 

 to determine whether it is likely to become a serious pest under the 

 climatic conditions prevailing in New England. 



Requests for Bulletins should be addressed' to the 



AGRICULTURAL EXPERIMENT STATION, 

 AMHERST, MASS. 



