140 



INSKCTS INJURIOUS TO STAPLH CHOPS. 



or attributed to other 'causes, as is much of that done 

 l)y root-lice on other plants, largely on account of igno- 

 rance concerning it. From the above desciiption of its life 



be 



i ^ 



CQ 



C 



o 



03 





M 



its destructive capacity may readily be seen, and also the 

 weak points in its career, at which times it may be most 

 successfully combated. With such a knowledge to guide 

 us, the application of the cultural methods outlined is but 



