INSECTS ATTACKING GARDEN VEGETABLES. 



59 



In the last 'few years it has been extending its range northward 

 through Kansas, until now it appears to have spread over the greater 

 part of the State. 



In the Report of the Kansas State Horticultural Society for 

 1882, Mr. A. N. Godfrey reports that the pest appeared about 

 the last week in July (1882) in Greenwood county in great 

 numbers. It was found on cabbage, turnips, horse-radish, and 

 mustard. He declares that it is generally considered a new in- 

 sect among the farmers. In recent years it appears to have done 

 little injury in the State. 



IMPORTED CABBAGE- WORM. 

 (Pieris rapce Linn.; Order, Lepidoptera.) 



Diagnosis. Infesting cabbage ; a naked, green caterpillar about 

 1 inches long, with a yellowish stripe along the back and a row 

 of yellow spots along each side, and dotted all over with black, 

 feeding on the leaves. 



Description and Lije-history. The adult insect is a common 

 white butterfly, the female having two black spots on each fore 

 wing, while the male has but one black spot on each fore wing. 



The wings expand about 

 1 1 inches. The eggs are 

 laid singly or in groups 

 of two or three each on 

 the young cabbage 

 leaves; the larvae, soon 

 hatched, feed on the foli- 

 age and become full- 

 grown in about two 

 weeks. Changing to 

 chrysalids, they remain 

 in this quiescent stage 

 for about 10 days, when 

 the butterflies emerge 



and lay eggs for another brood of worms. There are several 

 generations each season. The insect passes the winter in the- 

 chrysalid stage. 



FIG. 30. IMPORTED CABBAGE-WOKM; a, adult; 

 b, larva. 



