96 INSECTS OF ECONOMIC IMPORTANCE 



about one month ; propa])ly two g-enerations in a 

 season in the north. 



Control — Practice clean cultivation; plant early 

 crop of mustard or radish as a trap crop and de- 

 stroy the old bugs as they gather on this in the 

 spring by spraying with pure kerosene and then by 

 burning. 



OTHER INSECTS INJURIOUS TO CABBAGE 



Imported cabbage web-worm (HcIIitla iindalis). 

 Diamond-back moth (Plufella macitUpcnnis). 

 Cross-striped cabbage w^orm (Evergestis rimo- 

 salis). 



Southern cabbage butterfly (Pontia profodicc). 

 Flea-beetles (Various species). 

 Cabbage curculio (Cenforhyiichns rapcc). 



ASPARAGUS PESTS 



The asparagus beetle^" (Crioccris asparagi) 



Order — Coleoptera 



For two hundred years asparagus had no pests; 

 now there are two beetles that work on it, both be- 

 ing imported from Europe; the one here was first 

 found in Queens County, New York, in 1862, but 

 had probably been introduced about 1856. 



The beetles hibernate under rubbish and appear 

 in May; they lay their eggs on the stems of the 

 asparagus where they hatch into soft grubs; these 

 eat the plants and in ten days to two wxeks attain 

 their growth and go into the ground to pupate ; in 

 5 to 8 days the adult beetles appear, the whole life 

 cycle occupying 3 to 7 weeks; 2 or 3 broods a sea- 

 son here. 



Control — Hand-pick in small beds; cut down 



12 Chittenden— U. S. Bu. Ent., Circ. 102. 



