48 bulletin 8&i, r. s. department of agriculture. 



Carbon disulphid will kill the insects and has been used successfully 

 by Davis and Luginbill (45, p. 25) on putting greens, but it has 

 not been thoroughly tested on truck farms. The same applies to the 

 rotation of crops. 



It should be remembered that other remedies which are applicable 

 for common white grubs, such as plowing and the utilization of 

 domestic animals as destroyers, are ineffective under ordinary cir- 

 cumstances. 



GENERAL SUMMARY. 



The green June beetle is a common and well-known insect in the 

 eastern United States, from Xew Jersey and southern Illinois south- 

 ward. It occurs also commonly on Long Island and in southern 

 Connecticut. . 



It prefers a sandy or sandy loam soil, richly incorporated with 

 humus, and for that reason is troublesome in many trucking sections 

 of the country, particularly the sandy coast regions. 



The larva?, or grubs, injure vegetables of many kinds, particularly 

 celery, parsley, lettuce, beets, turnips, carrots, parsnips, collards, 

 sweet corn, and peas and beans in the seedling stage. 



"While there is evidence that the larva? injure certain of these 

 plants by severing the roots and young stalks, major injury is due 

 to the upheaval of the soil around the plants, which disturbs the 

 root system. Their constant burrowing near the surface in the fields 

 and garden loosens the earth, causing it to dry out, which greatly 

 retards and injures the plants* growth. 



The grubs are the cause of extensive trouble on lawns and golf 

 greens and do injury also to alfalfa, oats, and some other crops, in- 

 cluding ornamental plants. 



The beetles injure fruits of various kinds, especially grapes, 

 peaches, apricots, and figs, and growing ears of corn, and feed also 

 on the sap of trees. 



There is only one generation or brood of this insect a year. 



The beetles occur from the middle of June to September and are 

 to be seen in greatest numbers from the middle of July to the middle 

 of August, these periods varying somewhat according to location and 

 temperature. 



Eggs are deposited from 6 to S inches below the surface of the 

 soil and hatch in from 10 to 15 days. After the first molt the larvae 

 feed nearer the surface of the soil. Larvae become three-fourths 

 grown by late fall, having molted twite. With the approach of 

 cold weather, they go deeper into the ground — S to 10. and even 30. 

 inches below the surface — and continue inactive during the winter, 

 except in mild winter localities where the grubs may be active at any 

 time during warm spells. Early in spring, depending on locality. 



