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INSECTS INJURIOUS TO ROOT CROPS. 



Turnips, rape, mangels and carrots. 



(Consult Bui. 52 C. E. Farm, Ottawa, and Bui. 60 111. Exp. Sta.) 



The Roots — 



(a) Tips of roots of young carrots with rusty patches on surface, or " rust 



colored tunnels in the pulp, due to slender yellowish white maggots — Carrot 

 Rust Fly (Psila rosae). 



The Carrot Rust;fly— 1, 5, 7, natural size ; 2, 6, 8. enlarged. (Curtis) 



(b) Roots of turnips bored or tunnelled by minute grubs — Turnip Flea 

 Beetle (Phyllotreta vittata); Cabbage Root Maggot (Phorbia brassicae) . 



(c) Roots cut off— Wireworms, White Grubs, Cutworms. 



The Stem and Leaves — 



(a) Young plants cut off at the ground — Cutworms. 



(b) Surface of first leaves of turnip and rape eaten into small holes by small 

 black, striped beetles — Turnip Flea Beetle (Phyllotreta vittata). 



(c) Leaves partly consumed by pale green caterpillars — Cabbage Worm 

 (Pontia rapae). 



