33^ 



ECONOMIC ENTOMOLOGY 



OTIORHYNCHIDiE (SCARRED SNOUT-BEETLES) 



Strawberry Root Weevil (Otiorhynchus ovatus Linn.). — Adult. A 

 small brownish-black snout-beetle; 3-^ inch long. June and August- 

 September (Fig. 217). 



Eggs. — Female lays about 50 eggs in 4 to 15 days in the soil. Hatch 

 in 21 days. End of June to end of August. 



Pig. 217. — Strawberry root weevil {Otiorhynchus ovatus) and its grub. {After 

 Treherne, Bui. 8, Div. Ent., Dept. Agric, Can.) 



Larva. — A small white grub ^^ inch long; feeds on roots of straw- 

 berry, clover, timothy, rhubarb, rumex; lasts about 7 months. Winters 

 partly grown. 



Pupa. — Four to eight inches below surface; lasts from 21 to 24 days. 

 May-June. 



Control. — Rotation of crops as two- and three-year plantations suffer 

 most; thorough cultivation; growing of suitable varieties; use of 

 chickens. 



The Black Vine Weevil or the Cyclamen Borer {Otiorhynchus sulcatus 

 Fab.). — Occurs from the Atlantic to the Pacific in Northern U. S. and 

 Canada, and is injurious to roots and crown of strawberry, also to 

 Gloxinia, Cyclamen, Primula, Maiden-hair fern n greenhouses. 



Adult. — A black beetle, % inch long, with patches of yellowish hairs 

 on the wing-covers. Wing-covers joined together and wings absent. 



