Fi(]. 61. Cranberry Tipworm. Cranberry uprights attacked by both broods, the branching 

 of the tops being due to the work of the first, the cupped tips to that of the second. 



in Washington rather recently (D. J. Crowley). It has been said to infest other 

 heaths and loosestrife.*^'' 



Character of Injury 



The first brood of maggots works mostly during the first half of June. It 

 does little harm for it is seldom abundant and the vines have time to recover. 

 The second brood is much more plentiful and generally appears when the vines 

 are in full bloom. Its work is more serious for it interferes with the development 

 of the terminal buds that should produce the blossom-bearing growth the next 

 year. 



Both broods work wholly among the leaves at the tips of the uprights and 

 runners. These become cupped and bunched together characteristically (fig. 59). 

 This is due to the feeding of the worms on their inner surfaces which they rasp 

 with a little horny process on the under side of the body. The inner leaves die 

 (fig. 60) and sooner or later break off. New growth repairs the injury done by 

 the first brood (fig. 61). Side buds usually develop in most of the tips attacked 

 by the second brood, but these are more likely than terminal buds to produce 

 leafy growths instead of flower shoots the next year, especially if the vines lack 

 vigor. 



Description and Seasonal History 



FLIES AND EGGS 



The adults are delicate flies less than a sixteenth of an inch long and expanding 

 less than an eighth of an inch. The male is rather dark and inconspicuous, 

 but the female (fig. 62) has a large bright reddish abdomen. The female lays her 

 eggs near the bases of the terminal leaves (fig. 63). The eggs are watery trans' 

 lucent with scattered reddish pigment and are about a seventieth of an inch long. 

 They are smooth, elongate, usually curved from end to end, and with 

 rounded ends. 



WORMS AND COCOONS 



From one to five maggots appear in each infested tip. They vary from pale 

 yellowish to orange red and are pointed at one end (fig. 64). They have 

 neither legs nor head. They mature in about ten days, becoming about a six- 

 teenth of an inch long. Those of the first brood make their cocoons in the 

 injured tips and the flies emerge in a few days; those of the second descend 



B3 Lysimachia sp. 



[62] 



