14 



MASS. EXPERIMENT STATION BULLETIN 317 



in the spring after growth starts but before egg laying begins, usually about May 

 20, with Bordeaux mixture and calcium arsenate made up as follows: 



Stone lime 10 pounds 



Copper sulfate 6 pounds 



Water 100 gallons 



Calcium arsenate 6 pounds 



Fish-oil soap 4 pounds 



Figure 7. Red-striped Fireworm Injury on Blueberry. 



The blueberry stem borer, Oberea myop^ Hald., (4) sometimes does consid- 

 erable damage to blueberry bushes. There are two kinds of injury caused by 

 this insect: injury to the young shoots by the adult beetles during egg laying 

 (Fig. 6A); and injury to older stems and sometimes to the roots by the feeding 

 of the larvae (Fig. 6B and C.) 



The beetles lay their eggs in the young shoots about six inches from the tip. 





