INSECT TESTS 



247 



up, generally through another cane, and undergoes its 

 changes several inches above the surface of the ground. 

 The canes and the roots are often so injured as to start 

 . very slowly in the spring, turning yellow in the early 

 summer and finally dying. 



Remedy — The only remedy suggested is that of 

 cutting o£^ the injured canes and digging out the borer 

 in the root. Vigorous growth will, in a measure, over- 

 come its injury. 



Raspberry Cane Borer (Oberea bimaculata) — A 

 small long-horned beetle with a black body and a 

 pale yellow thorax marked with tlirce black spots. 

 It flies in June and 

 lays its eggs between 

 two girdled places 

 near the end of the 

 3^oung canes, when 

 only a few inches high. 

 The canes break off at 

 the top girdle, when 

 the food supply will be 

 increased for the larva that soon hatches and bores down 

 the cane, feeding in the pith until the following spring, 

 when it comes out a perfect insect in May or June. 



Remedy — To overcome this pest the injured canes 

 should be cut off below the lower girdle soon after the 

 Qgg is laid. 



Fig. 132— The May Beetle and Larva 



INSECTS ATTACKING THE BLACKBERRY 



Raspberry Root Borer — See under the raspberry. 

 Raspberry Cane Borer — See under the raspberry. 



INSECTS ATTACKING THE STRAWBERRY 



May Beetle {Lachnosterna fusca) (Figure 132) — 

 In the larval form this insect is injurious to the straw- 

 berry by feeding on the roots of newly set plants. The 



