248 Bush-Fruits 



from April to August. The eggs are inserted just under the bark of 

 the young tender tips of the young canes. The larva works down- 

 ward, several times around the cane, thus girdling it. It then bur- 

 rows upward until the tip dies, after which it works downward 

 through the pith toward the base of the cane. When fully grown 

 the larva is nearly an inch long and nearly white. It pupates at the 

 end of the burrow and the adult gnaws its way out. Crushing the 

 egg, the presence of which is shown by the discolored tissue, or cut- 

 ting off and burning the dying tips, seem to be the most feasible 

 means of controlling it. 

 Reference. 



Monthly Bull. State Com. of Hort. Cal. I, No. 12 (1912). 



THE LESS PROMINENT INSECTS 



The preceding list aims to include all species which are injurious 

 enough to possess real economic importance, but no strict dividing 

 line can be drawn. Special conditions may at times favor the de- 

 velopment of a particular insect to such an 

 extent that it may become a serious pest for a 

 short time, while ordinarily of little impor- 

 tance. Much depends upon conditions and en- 

 vironment. 



Many others are known to attack bramble 

 plants, some of which are general feeders and 

 some of which from their very nature can never 

 do serious damage. Among those which may 



Fig. 33. Tarnished at times give concern are the ones mentioned 



plant-bug. below> 



Lygus pratensis. ., . . . . 



1 he tarnished plant-bug, Lygus pratensis , Linn. 



(Fig. 33), sometimes attacks the young fruits of blackberries and 

 perhaps raspberries, causing them to develop imperfectly. No very 

 satisfactory method of control seems to be available. 



The raspberry geometer, Synchlora glaucaria, Guen., is a small 

 caterpillar which feeds on the leaves and especially the fruit of the 

 raspberry and blackberry. Its presence in the fruit is the more an- 

 noying because it disguises itself by fastening to the thorny prickles 

 of its body bits of dried berry, seed, pollen, leaves or other debris, 



