RASPBERRY, BLACKBERRY AND DEWBERRY INSECTS 321 



The Raspberry Webworm 

 Pamphilius fletcheri MacGillivray 



This insect has become troublesome only in New Brunswick, 

 and httle is known of its life history. The smooth, bright green 

 larvae, half an inch in length when full-grown, web together the 

 terminal leaves of the raspberry, making a tent within which 

 they feed. The adult sawfly is a Httle less than f inch in length ; 

 the head and thorax are black, marked with white; in the 

 female the front third of the abdomen is black and the rest 

 redchsh-yellow ; in the male the abdomen is black with a broad 

 yellowish band across the middle. The adults appear about 

 the middle of June, and the larvae develop during the next few 

 weeks. The eggs are unknown. The winter is probably passed 

 by the larvae in the ground. 



This rather uncommon pest can be controlled by persistent 

 hand-picking of infested leaves or by dusting the plants with 

 hellebore soon after the larvae hatch, before they have webbed 

 the leaves together. 



Reference 



Fletcher, Rept. Ent. Bot. for 1899, p. 180. 1900. 



The Raspberry Leaf-roller 

 Exartema permimdanum ( Uemens 



The terminal leaves of the raspberry are sometimes webbed 

 together in May and early June into a more or less twisted 

 mass by a small dark green larva with a pitchy-l)lack head 

 and thoracic shield. This caterpillar is sometimes destructive 

 to strawberries by webbing together the clusters of flowers and 

 flower buds. When full-grown the larva usually folds over a 

 part of a leaf, forming a cavity within which it pupates. The 

 moths appear in about two weeks ; they have a wing expanse 



