CAPE COD CRANBERRY INSECTS 



19 



All the worms that liatcli In ,Iune pupate in their nests after mid-July, the 

 moths emerging at the end of ,Iuly and early in August. Most of those that 

 hatch after the first of July continue as worms till the following May as al- 

 ready noted. The insect is therefore partly one-brooded and partly two- 

 brooded. 



Treatment. 



Spraying with 6 pounds of dry lead arsenate to 100 gallons of water is 

 effective, but three applications (about June 22, July 10 and July 28) are 

 necessary because of the long hatching period of the insect. 



One thorough application, about August 6, of the nicotine sulfate and soap 

 spray advocated for the black-headed fireworm will eradicate this pest. 



Spotted Fireworm. 

 Fig. 20. Cranberry uprights with tips webbed by young worms. 



Spotted Fireworm.'^ 



This is the least important of our four fireworms. It works mainly on dry 

 bogs, never infesting those that are reflooded regularly. It works like the 

 yellow-headed fireworm (fig. 20), but sews even more uprights into its nest. 

 It sometimes does considerable injury but never browns a bog. 



Distribution and Food Plants. 



This species lias l)een found in Mame, Massachusetts, New Jersey, New 

 York, Illinois, Wisconsin, Minnesota and Canada. It has been recorded as a 



28. Cacoecia parallela (Rob.). 



