206 



ENTOMOLOGY. 



year, and both chrysalids and moths hibernate. Apply 

 remedies like those suggested for the cabbage-butterfly. 



The Harlequin Cabbage-bug [Murgantia Mstrionica 

 Halm). — Destroying, in the Southern States, by its punc- 

 tures, cabbages, turnips, radishes, mustard, etc.; a black 

 and orange-colored bug. The very young, as well as the 

 old, combine to destroy the plant, which wilts as if poisoned. 



Besides those already mentioned, cabbages are more or 

 less injured by the web-moth (Pluiella xylostella Linn.), 

 the zebra caterpillar (Mamestra picta Harris), the cab- 

 bage Aphis, the cabbage-weevil {Otiorliynchus piripes 

 Fabr.), etc. All can best be destroyed by the use of py- 

 re thrum. 



The Radish-fly {Anthomyia 

 radicum Bouche). — The 

 chief pest of radishes is a 

 small white maggot which at- 

 tacks young plants raised in 

 old soil. It changes to a pupa 

 within a barrel-shaped pupa- 

 case, from which emerges 



Fig. 249 —Radish-fly. a, larva; b, c, ni n ■ i i 



pupa-case, natural size and enlarged, a small fly Similar tO, Dllt 



-After Curtis. ab(mt ]m]f ^ } th& 



house-fly. 



large as, 

 The best preventives are early sowing in a light 

 new soil, and the annual ro- 

 tation of crops; also the appli- 

 cation of hot water, salt, and 

 lime. 



The Pea-weevil (Bruchus 

 pisi Linn. ). — The only serious 

 pest of peas is the weevil, 

 which spends its whole life in 

 the pea, except when the 



enlarged; b. pea containing a weevil, plant is in flower. 



Remedies. — As a preventive against wormy seed-pens, they should 

 be kept sealed up in tin cans over one year before planting; or soak 

 the peas in boiling water for a few minutes before planting. Worm- 



Fig. 850. — Pea-weevil, natural size and 



