324 STATE HORTICULTURAL SOCIETY. 



peacheM and plums, and even these will often be seriously marred by 

 punctures made in feeding. 



This insect hibernates in the perfect state around buildings and 

 under loose bark of forest trees, or any convenient shelter. The best 

 remedies are trapping in the early spring, by means of chips and cobs 

 placed upon the carefully smoothed earth around the trees, and by 

 jarring from the trees upon cloths, or in the regular curculio catcher. 



Spraying with the arsenites has not proved sufficiently successful 

 to warrant its advocacy in the case of this insect. 



37. Give brief account of cabbage worm ? 



There are a large number of "cabbage worms," but the most de- 

 structive of these is the larva of the European cabbage butterfly 

 fPieris rapal.J This was accidentally introduced into this country 

 about forty years ago and has since spread throughout the length an ♦! 

 breadth of the land. The larva, which does the damage, is a velvety 

 green worm with a yellowish stripe down the back and one along each 

 side. When full grown it measures one and one-eighth inches in length 

 and onetifth inch in diameter. It is very voracious, often boring into 

 the heart of the cabbage and feeds for a period of two or three weeks. 

 In this latitude there are three annual broods. It has passed its period 

 of greatest destructiveness in this State, as its parasitic enemies have 

 have so increased in number as to keep it measurably in check. 

 Where it appears in great numbers it may be killed by dusting with 

 Paris green — one part to twenty of flour — or with white hellebore or, 

 best of all, with pyrethrum powder. 



38. Give brief account of Colorado potato beetle. 



The Colorado potato beetle f Doraphora 10-lineataj is a native of 

 the far West, which has migrated eastward until it has reached and 

 even crossed the Atlantic. It is a stout, handsome beetle of oval 

 form, nearly one-half inch in length. The body and under wings are 

 of a red color, and the shelly wing-cases ochreous-yellow, each one 

 with five broad black stripes. The larvie, which do most of the 

 damage, are thick, slug like, disgusting grubs, with black heads and 

 collars, but otherwise of a dark, livid, flesh color. The bright, yellow 

 eggs are deposited in clusters on the under sides of the leaves. They 

 hatch about a week later, and the grubs feed for three weeks. When 

 full grown the burrow into the ground and there transform, the beetles 

 coming out again in ten days. There are in our latitude three or four 

 annual broods. Like the cabbage worm, this insect is much less 

 destructive than formerly, owing to the increase of its natural enemies. 

 It is also easily killed by the use of Paris green, either as a spray or 

 dust mingled with flour or air-slacked lime. 



