CRANBERRY INSECTS 



471 



Fig. 392. — The cranberry fulgorid, 

 adult female ( X 8) . 



front pairs of prolegs are not 

 provided with booklets and 

 do not function in walking; 

 these caterpillars therefore 

 have a looping gait like a 

 measuring-worm. As the cat- 

 erpillars become larger they 

 often defoliate the cranberry 

 vines ; they also attack vari- 

 ous weeds and grasses. We 

 have reared them on wild 

 cherry leaves. When full- 

 grown, the caterpillar is nearly 

 two inches in length ; the head 

 is a uniform brown without 

 spots ; the body varies in color from light green to ver}^ dark 

 velvety brown and is striped with narrow lines of yellowish. 



They become full-grown in 

 July and go into the ground, 

 where they transform to a 

 brownish jnipa ; the moths 

 emerge in August and Sep- 

 tember. 



Mcanfi of control. 

 T\w younger caterpillars 

 can be poisoned by thorough 

 applications of arsenate of 

 lead, 4 to 7 pounds in 100 

 gallons of water. The older 

 caterpillars are not easily 

 killed by arsenicals. Where 

 water is available the young caterpillars can be destroyed by 

 reflowing the bogs for twenty-four to thirty-six hours soon after 

 the middle of May in Massachusetts. If reflowing is deferred 



Fig. 393. — Fifth stage nymph of the 

 cranberry fulgorid (X 9) . 



