MANUAL OF VEGETABLE-GARDEN INSECTS 



front wing is grayish ; there are two 

 hhick spots on the front wing of the 

 female and one in the male and in 

 both sexes there is a black spot near 

 the front margin of the hind wing 

 (Fig. 5). Spring males are smaller 

 and sometimes unspotted. In New 

 England the cabbage butterfly has 

 three broods annually and in the 

 South there are said to be six. 



Control. 



Cabbage worms may be easily 

 killed by spraying with paris green, 

 1 pound in 50 gallons of water, or 

 arsenate of lead (paste), 4 pounds in 50 gallons of w^ater. 

 The first application should be made soon after the plants 

 are set out and repeated whenever the w^orms become numer- 

 ous. The poison may be applied in the form of a dust diluted 

 with some inert material, such as flour, plaster or hydrated 

 lime, but is not so effective wdien used in this way. Chemical 

 analysis of sprayed plants has shown that there is practically 

 no danger from eating cabbages that have been treated w^ith 

 an arsenical. In the home garden pyrethrum, hellebore or hot 

 water (130° F.) will be found convenient remedies. When only 

 a few plants are grown, hand-picking is often the cheapest and 

 easiest wav of destroving: the worms. 



Fig. 5. — The imported cixh- 

 bage worm butterflies, male 

 above, female below ( X f). 



References 



Scudder, Butterflies of Eastern U. S., 2, pp. 1175-1190; 1205-1218. 



1889. 

 U. S. Bur. Ent. Circ. 60. 1905. 

 U. S. Farm. Bull. 706. 1916. 



