226 



ECONOMIC ENTOMOLOGY 



cocoon within a tube of tangled leaves. Pupal stage lasts about 

 lo days. 



Life-history. — Hibernates as a half-grown larva, and matures in 

 June; pupal stage lasts lo days and moth emerges in July to deposit 

 eggs. Young caterpillars feed on epidermis of under side of leaf and on 

 green tissue within a silken tube for protection. Toward the end of 

 September they leave their silken tubes and form oval silken cases on 

 the smaller twigs near the buds, where they hibernate (Fig. 139). 



Fig. 140. — Pea moth: a, a full grown "worm" or caterpillar (enlarged); 

 b, adult moth with wings expanded (enlarged); c. adult moth with wings closed; 

 d, a group of five peas injured by the caterpillar of the pea moth. 



Parasites. — Pimpla conquisitor , Bassus earinoides, Trichogramma 

 pretiosa {Pentarthron minutum), Opius sp., Microdus laticinctus. 



Control. — Spray with arsenate of lead when buds are expanding, 

 when the leaves are expanded, and before and after blossoming. 



ArgyroploceconsanguinanaWdX'i\im..\s, another bud pest of occasional 

 importance. 



Pea Moth {Laspeyresia nigricana Steph.). Adult.— K small grey 

 moth % inch long. July (Fig. 140). 



J 



