

GRAPE-VINE HOG CATERPILLAR 161 



under side of leaves. These eggs hatch in a few days into small, 

 yellow caterpillars, which, for a time at least, are gregarious, and 

 eat only the under sides of the leaves. Later they scatter and feed 

 on all parts of the leaf. When full grown the hairy covering of the 

 body is worked into a silken cocoon in which the chestnut-browr. 

 chrysalis is formed. The two broods intermingle so that the insect 

 is present, in one form or another, from spring to autumn. It is 

 a common and rather serious pest and something of a general 

 feeder. 



Control. When in moderate quantities it may be hand- 

 picked. If numerous, use arsenate of lead spray as strong as four 





Fio. 178. The hog caterpillar of the grape. (After Riley.) 



pounds to fifty gallons, since the caterpillars are thoroughly 

 resistant. 



The Grape-vine Hog Caterpillar (Ampelophagus myron Cram). 

 These caterpillars are very destructive to foliage of the grape, 

 and are also said to bite off stems of unripe grape clusters, causing 

 them to fall. 



The chrysalis is formed in clusters of leaves which are bound 

 together with a silken thread. 



The adult moth has long and narrow wings, expanding two and 

 one-half inches. The front wings are olive green, crossed by bands 

 of greenish gray. The hind-wings are dull red, shading to greenish 

 gray next to the body. 



The caterpillar (Fig. 178) is two inches long, green in color, 

 11 



