GBUBS DEVELOPING WITHIN THE FRUIT 



335 



the punctures as does the curculio. In feeding the beetle gouges out 

 small round holes. 



The grub pupates inside the fruit, and then emerges as an adult. In- 

 fested plums usually drop before the adult is due to emerge. Hiber- 

 nation takes place in the adult stage. 



Jarring the trees to catch the beetles is a fairly effective treatment. 

 Prompt destruction of fallen fruit is of value, where practicable. Early 

 sprajdng with arsenate of lead or Paris green, as recommended for the 

 plum curcuUo, is likely 

 to kill most of the 

 hibernating adults. 



The Grape Curculio 

 {Craponius inoBqualis 

 Say) 

 The fruit of grapes is 

 sometimes found in- 

 fested by a white, fleshy, 

 inactive grub, footless, 

 and tapering towards 

 each end. This is the larval stage of the grape curculio. It may 

 readily be distinguished from the other grub commonly found in 

 grapes, that of the grape berry moth, which has distinct legs, is more 



slender and cylindrical, and is greenish 

 or Hght purplish in color. 



The adult beetle is one tenth of an inch 

 long, quite broad, and brown in color. 

 It appears from hibernation when the 

 grapes are blossoming, and feeds on the 

 foliage. Later it begins laying eggs in the 

 berries. The grub, when mature, drops 

 to the ground, transforms in the soil, and a 



new generation of beetles is abroad in late 

 Fig. 521.— The Grape Cur- , ^, . . , ., 



culio. Enlarged and nat- Summer, shortly entermg hibernation. 



ural size. Original. There is thus one generation each year. 



Fig. 



520. — Work and larva of the Grape Curculio. 

 Slightly enlarged. Original. 



