123 



arsenate of lead was still better. 



MR. FINNEY: lu regard to the woolly aphis I would 

 like to suggest that I have heard from the New York Experi- 

 mental Station that by using Black Leaf-40 and soap and 

 pretty good pressure you ean drive the nieotine through 

 that woolly cover. The dilution is one pint to 100 gallons 

 of water, with enough soap to make it as strong as necessary. 



MR, KPjNDALL : I had two years experience in succes- 

 sion using Black Leaf-40 and soap solution as the previous 

 speaker has mentioned, with success, on the woolly aphis. 



THE CHAIRMAN: Were these young trees? 



MR. KENDALL: Young trees, just set the year l)efore, 

 a year and Iavo years old. 



iMR. NORRIS: T used nicotine with tlie soaj). but pos- 

 sibly I did not have the pressure right. I used a Knapsack 

 sprayer as I could not run the engine in that field, it was 

 planted, a young oi'chard on it, and it did not take care of 

 the Avoolly aphis, although it helped the green lice to a cer- 

 tain extent. 



:\IR. DAVENPORT: I would lik,- to say that when we 

 use the nicotine solution alone we should use soap with it. 

 I did not say anything about using soap with this combina- 

 tion spray as in that case the adding of soap would give us a 

 dangerous mixture, but in using nicotine solution alone for 

 plant lice or for red bug in separate spraying, we always use 

 soap with it. 



]\1R. NORRIS: It is almost impossible to get a good 

 mixture without it. 



:\IR. DAVENPORT: Yes. it does not spread at all. with- 

 out the soap, nor is it as effective. 



MR. ROGERS: You think it advisable to use nicotine 

 for aphis without a very high pressure, for red bug or aphis, 

 simply throwing away materials in other words without a 

 very high pressure apj)aratus. got to strike them strong or 

 not kill them. 



:\IR. DAVENPORT: The more i)ressure we have the 

 better work we are going to do in regard to the lice. Of 



