232 ECONOMIC ENTOMOLOGY 



Strawberry Leaf Rollers {Ancylis comptana Frohl and Caccecia ohsole- 

 tana Walker). — These two tortricids often do injury to strawberry 

 leaves by rolling and destroying them. They may be controlled by 

 spraying the plants with a solution of lead arsenate (5 lb. to 100 gal. 

 water) within a week after the first appearance of the Moths. 



Heliozelid^ 



Resplendent Shield Bearer (Coptodisca splendor if erella Clem.). — 

 Sometimes a serious pest in orchards. Found from Maine to 

 Minnesota. 



Adult. — A small brilliantly colored golden-headed moth; fore wings 

 leaden grey and lustrous at base, outer portion golden with silver and 

 dark brown streaks; hind wings rich grey with long yellowish fringe; 

 antennae brown tinged with gold. May-June. 



Eggs. — ^Laid on leaves. 



Larva. — Small, 3^^ inch long, legless, light yellowish brown; head dark; 

 makes an irregular dark blotch mine )^ inch in diameter, in the leaf. 

 When full grown in July it cuts out a portion of the mine and forms a 

 seed-like yellowish shield, which is attached to bark. A second brood 

 in September, and in October the seed-like pupa case is formed. 



Pupa. — In an oval, disk-shaped seed-like case. Hibernates. 



Plutellid^ 



Diamond-back Moth {Plutella maculipennis Curtis). — A widely 

 distributed insect in U. S. and Canada. The caterpillar occasionally 

 attacks the leaves of turnips and cabbages, and does considerable 

 injury. 



Adult. — A slender moth of a general ashy-grey color with white 

 marks on the back, diamond-shaped when wings are closed; % inch 

 wing expanse. 



Eggs. — Minute, scale-like, greenish white or yellowish, laid singly 

 on lower surface of leaves. 



Larva. — ^A minute, active, dull green caterpillar with spindle-shaped 

 body and with a wriggling motion when disturbed; mature form ^0 

 inch long; feeds on the lower surface of the leaves; effects visible in July. 



Pupa. — Slender, yellowish, 3^4 inch long, enclosed in a beautiful 

 white lace-like cocoon on the surface of the leaves. 



