GRUBS DEVELOPING WITHIN THE FRUIT 



333 



the orchard. Early in the spring they come out; and as soon as the 

 buds are unfolding feed sparingly on the tender tissues. When fruit 

 has set, egg laying begins and continues 

 for several weeks. Infested fruit is apt 

 to drop. The larva enters the ground to 

 transform. There is a second generation 

 in midsunmier, the adult of this hiding 

 away until the following spring. 



Control is best directed toward killing 

 the overwintering beetles by spraying 

 the trees with arsenate of lead or Paris 

 green as soon as the buds are fairly open- 

 ing in the spring, repeating later if nec- 

 essary. Where trees are sprayed at the 

 time that the petals fall, this will consti- 

 tute the second spraying. In addition, 

 it will pay to eliminate rubbish as far as 

 possible from the orchard or its neigh- 

 borhood, and to adopt clean cultivation. 

 The former will destroy the hiding places 

 of the beetles, and the latter will kill 



many of the larvae that have entered the soil to transform. The 

 destruction of fallen fruit at frequent intervals is of value, where 

 feasible. 



On plmii trees the beetles may be controlled by jarring them from the 

 trees m the early morning, spreading a sheet beneath to catch them. 



Fig. 516. — Larva and work 

 of the Plum Curculio in 

 cherry. Slightly enlarged. 



The Apple Curculio {Anthonomus quadrigibbus Say) 



Usually the curculio attacking the fruit of the apple is the plum 

 curculio. Sometimes the depredator is the pest here considered. The 

 work of this species may be distinguished from that of the plum curculio 

 by the fact that the punctures that the apple curculio makes are com- 

 paratively inconspicuous. The beetle itself is similar to the plum 

 curculio, but is stouter and chunkier, has a larger snout, and has four 

 very prominent humps on its back. 



