148 PESTS OF GARDEN AND FIELD CROPS 



Prompt application of Paris green or arsenate of lead will check 

 the pest. Apply early before the bean pods are well formed. Clean- 

 ing up rubbish in the fall is of value. The destruction of weeds that 

 belong in the same botanical family is an additional remedial measure. 



The Bean Lady Beetle {Epilachna corrupta Muls.) 



In some of the Western states beans are subject to injury by tliis 

 species. Early in the season the foliage is eaten by the adults, which 



have hibernated. These are fol- 

 lowed by the larvae, and later a 

 new generation of adults is at 

 work. As soon as the bean pods 

 appear they are attacked as well 

 as the leaves. The larvae skele- 

 tonize the leaves, working on the 

 under side, wliile the adults de- 

 vour the leaf tissue entire. 



The adult beetle is broadly oval, 

 one tliird of an inch long, light 



Fig. 148. -The Bean Lady Beetle. ^^^^^^ ^^ ^^lor, and marked with 

 Enlarged and natural size. Origi- eight dots on each wing COVer. 

 ^^1- The larva is about the same size, 



yellowish, and covered with short, branched spines. There is one 



generation annually. 



Arsenicals, either Paris green or arsenate of lead, will kill both larvae 



and adults. The applications must be made to the under side of the 



leaves. 



The Squash Lady Beetle {Epilachna borealis Fab.) 



Both the insect and its work are characteristic. The adult beetle 

 is one third of an inch long, nearly as wide, yehowish to brownish in color, 

 and marked with seven large black dots on each wing cover. In addition 

 there are four small dots on the thorax. The eggs are yellowish, and are 

 laid in clusters on the leaf. The larva is oval in shape, a half inch long, 

 and covered with rather^ long, branching spines. The beetle marks 

 out a circular area on a leaf and then feeds within this. The larva 



