INSECTS INJURIOUS TO RASPBERRY AND BLACKBERRY 417 



short white hairs. When full grown the larva drops to the 

 ground and forms an earthen cell just beneath the surface, in 

 which it transforms to a yellowish pupa, from which the beetle 

 emerges the next spring. Only red raspberries seem to be affected, 

 and some varieties are particularly injured. The insect has been 



FIG. 351. Early ripening berries, the smaller ones infested with Byturus 

 larvae. (After Goodwin.) 



reported as injurious from Minnesota to Massachusetts and in 

 Ontario. 



Control Inasmuch as the beetles feed freely on the foliage 

 before ovipositing they may be destroyed by spraying the leaves 

 with arsenate of lead. Mr. Goodwin has shown that where 

 foliage was sprayed with 4 pounds per barrel, that three-fourths 

 of the subsequent injury to the berries by the larvae was pre- 

 vented by the destruction of the beetles, and the injury to the 

 flower buds was also lessened. Thorough cultivation in the fall 

 close around the bushes will probably destroy many of the pupse 

 by exposing them to whiter weather. 



