BA8PBEREY, BLACKBERRY AND DEWBERRY INSECTS 329 



(Fig. 286). The second season it continues its burrow through 



what is now the bearing cane and usually kills it before the 



fruit matures. It reaches the base of the cane by fall and there 



passes the second winter in its burrow below the 



surface of the ground. The burrow winds through 



the pith and at frequent intervals an opening 



is made in the bark through which the larva 



casts forth its excrement. The larva pupates in 



its burrow the second spring after theJaying of 



the egg and the beetle emerges in May and June. 



Treatment. 



The tips of the young canes in which the eggs 



are deposited soon wilt and are easilj^ seen. As 



soon as noticed they should be cut off below the 



lower girdle and destroyed. Likewise when 



bearing canes are found infested with the borers 



they should be cut close to the ground and 



burned. This pest would probably be much 



more abundant were it not the common practice 



to cut out and burn all old canes after the crop 



has been picked, thus destroying all the nearly 



mature borers. 



References 



Fig. 286. — 

 Ra sp b erry 

 cane-borer hi- 

 bernating in a 

 short burrow 

 at the tip of 

 a cane. 



Cornell Agr. Exp. Sta. Bull. 23, pp. 122-124. 1890. 

 Ohio Agr. Exp. Sta. Bull. 96, pp. 20-22. 1898. 



The Raspberry Cane-maggot 

 Phorhia rubivora Coquillett 



Black and red raspberries and blackberries are sometimes 

 severely injured in the Northern states and Canada by a small 

 white maggot which burrows in the new canes and kills them. 

 It also occurs in western Washington. The parent fly (Fig. 

 287) closely resembles the house fly, but is somewhat smaller. 



