98 



INSECTS INJURIOUS TO VEGETABLES 



plants to grow as traps to lure the female fly to deposit her 

 eggs. Afterward, in late June or early July, pull the trap 



Fig. S?i.—Criocens 12- 

 punctafa. Egg. natur- 

 al size, on asparagus, 

 right: enlarged at left. 

 (Chittenden, U. S. 

 Dept. Agr.) 



Fig. 55x- — Asparagus miner, a. Larva; b. c, 

 spiracles; (3'. e. puparium / section of asparagus 

 stalk, showing injury and puparia. ae. Much 

 enlarged; /, slightly reduced. (Author's illus- 

 tration. U. S. Dept. Agr.) 



plants and promptly burn them with their contained insects (in 

 the flaxseed stage, fig. 55^-, d, c). 



If this is carefully done over a considerable area, there 

 will be little necessity for other methods, as few insects will 

 be left for another season; unless, indeed, this insect has an 

 alternate food plant. Cooperation and thoroughness are essen- 

 tials for success. This method will operate also against the 

 rust which is often present in fields infested by the miner. 



