THE COMMON INSECT ENEMIES OF THE PLUM 1185 



In early spring the eggb are deposited just beneath the surface 

 of the fruit, and the grubs burrow into the pit, where they feed 

 a nd finally pupate. The beetles emerge in the fall and feed for a 

 short period before hibernating. 



Control. Spraying as recommended for curculio is probably 

 the most satisfactory means of control for this pest. Jarring has 

 also been advised. 



INSECTS ENCRUSTING THE BARK 



San Jose Scale 



San Jose scale, Aspidiotus pemicio- 

 Sllti Comstock, is a destructive pest 

 found most commonly on the smaller 

 limbs and branches of the tree, but all 

 parts may become infested, including 

 the trunks of small trees and the leaves 

 and fruit where infestation is heavy. 

 The affected bark presents a dull gray- 



390. SAN JOSE ish granular appearance, due to a thin 



ashy encrustation, which when scraped 



away reveals the minute yellow bodies of insects. Close examina- 

 tion shows a single scale tc consist of a circular shield of grayish 

 or blackish color, with a tiny protuberance in the centre the 

 " nipple," as it is called, about which are a number of concentric 

 circles. By raising this shield with a pin, the tiny, yellow, and 

 almost shapeless body of the insect may be seen. 



In Xow York during the latter part of May the insects after 

 having passed the winter are mature, and about a month later the 

 females begin to give birth to living young. These small insects, 

 which are provided with eyes and legs, move about over the bark 

 for a short time, but finally settle down, and do not move again. 

 After a few days when the insects have formed protecting scales, 

 the eyes and legs are soon lost. In this latitude there are several 

 generations a year. 



Control San Jose scale .may be controlled by spraying with 

 lime-sulphur wash in spring when the trees are dormant, In case 

 of severe infestation, a similar application may be made in the late 



