CONTROL OF INSECTS INJUKIOTJS TO THE GRAPE 1303 



The eggs are orange in color, about four-hundreclths of an inch 

 in length, ami of a cylindrical form. They are placed about the 

 buds and in the crevices of the rough bark of the canes (Fig. 

 441). Most of the eggs hatch by the middle of June. 



The larvae (Fig. 442) feed upon 

 the foliage during the month of 

 June and early July, and on reach- 

 ing full growth crawl to the ground, 

 in which they form cells and pupate. 

 The adults (Fig. 44.'> ) emerge the 

 latter part of July and usually seek 

 the wild vines, upon which they 

 feed. This late summer feeding 

 makes it difficult to locate the 

 beetles. The beetle enters hiber- 

 nation rather early in the fall. The 

 places most perf erred are woodland 



and situations in which leaves and 



i i . i n i , FIG. 443. ADULT OF GRAPEVINE 



rubbish collect, but they also seek FLEA-BEETLE (Enlarged) 



the shelter of rough bark of trees. 



From such places they emerge with the warm days of spring and 



seek the vineyards. Only a single brood develops each season. 



Control 



Two periods in the life cycle of this species are favorable for 

 control: (1) when the larvae are feeding and (2) when the adults 

 appear in the vineyard in the spring. Spraying the vines with 

 three pounds of arsenate of lead in 50 gallons of water when the 

 larvae are feeding on the foliage is a very effective method of 

 controlling this pest. If the adults appear in the vineyards in the 

 spring, the most practical method of control is hand picking. This 

 is accomplished by knocking the insect into a pan containing a 

 shallow layer of kerosene. This method is cheaper than spraying 

 with poison. 



The destruction of all wild vines near a vineyard will usually 

 give immunity from this pest. 



