74 



interesting operations until after several snows and severe frosts had 

 occurred. 



The twig girdler in the beetle stage feeds rather freely on the bark 

 of twigs. Enough of the surface is eaten to justify the belief that the 

 beetles may be killed by spraying with arsenical poisons. This treat- 

 ment is being tested at the present time. In the cases of all these 

 insects which sever the branches the wood is killed for the safety and 

 comfort of the insect as it undergoes further development above the 

 severed point. There is a period of at least several weeks in each case 

 after the twig dies during which the insect in one stage or another 

 remains in it to complete its growth. This affords an opportunity to 

 gather the twigs and burn them with the assurance that the insects are 

 being destroyed thereby. 



At least some progress has been made in discovering the habits and 

 the methods of controlling these and various other insects that may be 

 expected to give nut growers in the north more or less trouble. The 

 remedies that can be offered at the present time are not in all cases en- 

 tirely satisfactory. There is much yet to be learned, but there are 

 control measures within the reach of most of the nut growers which 

 are well worth consideration and adojotion. 



The Secretary: Dr. Zimmerman, will you read to us now? 



Dr. Zimmerman: Perhaps some of the members will not be so 

 glad to hear what I have to say, but I feel that there is a need for 

 something along the line I will refer to. 



