40 



FAEMEKS BULLETIN 856. 



A comparatively small number of injurious insects affect celery, 

 Avitli the exception of general feeders. Those which prefer celery 



usually live also on the re- 



lated plants, carrots, parsley, 

 and parsnips. For conven- 

 ience, pests of these plants 

 may be considered together. 





CELEKY LEAF-TYER. 



The celery leaf-tyer (fig. 

 45) is known also as the green- 

 house leaf-tyer. While more 

 abundant in greenhouses, at- 

 tacking various plants, such 

 as the roses, violets, and car- 

 nations, it is injurious to gar- 

 den celery, cabbages, beets, 

 lettuce, cauliflower, j^arsley, and cucumbers. The moth has a wing 

 expanse of about three-fourths of an inch and is clay-brown, orna- 

 mented with black lines. The larva, or caterpillar, is green or green- 

 ish yelloAv, nearly transparent, with darker head, and striped. The 

 leaf-tyer usually works on the under side of leaves, chiefly at night, 

 resting by day in the same location. 



he celery leaf-tyer U'lih/itaeriia fci- 

 a. Moth ; b, same in natural posi- 

 tion at rest ; c, egg mass ; d, larva from 

 above ; c, same from side ; f, head of same ; 

 il, pupa case ; h, chrysalis, a, h, d, e, g, h, 

 one-half laru'er than natural size ; c, twice 

 natural size : i , rfntvc enlarged. 



/ 





r ^ 



Fig. 4G. — The celery caterpillar (Papilio polyxmex) : a. Larva from side: h, larva show- 

 ing head with odoriferous appendages ; c, male butterfly ; d, outline of egg ; c. younj; 

 larva ; f, chrysalis. -Ml about natural size except d, wliich is much enlarged. 



Control. — It can bo hand i)icked successfully in the small home 

 garden. Lead arsenate should be used in larger areas. 



