76 



THE PRESIDENT : Has anybody had any experience in 

 controlling the pear psylla in the summer? 



MR. CLARKE : As I said before, we haven 't completely 

 controlled it, but I do know a few parties around German- 

 town, New York, who have done something with it. Mr. 

 Morrell is probably one of the largest pear growers in the 

 Hudson Valley, and he had the pear psylla after the blossoms 

 L.ad fallen, and he kept his sprayers working night and day 

 with Blaek-leaf-40, and he has controlled it. He even went 

 so far as to spray at the time of picking. That is an expen- 

 sive proposition. 



QUESTION: How do you mix your oil and water? 



MR. HITTINGER: I have a barrel, and take about 20 

 gallons of the oil and then put in about 10 gallons of water 

 and mix it all up in there. I use 10-gallon milk cans, put in 

 so much stock solution and add water to complete the pro- 

 portion. Generally mix it up in one place and put it in the 

 can and cart that around to keep the sprayer going. It is an 

 easy way to handle it. Generally we use a little warm 

 water, so that it won't be too cold for the men when they are 

 handling it. Cold water will do, but I think warm water 

 works a little better. 



:\1R. SMITH, of Wellesley: I want to tell you a pretty 

 expensive experience I had last Friday. Usually we put in 

 all the water and add the oil and stir it thoroughly and get 

 a good emulsion. I always got a good mixture until last 

 I^'riday, but then the oil all gathered on top, half an inch 

 deep, and I couldn't mix it. 



:\IR. HITTINGER: They claim that it is not fit to use 

 then. 



]MR. SMITH : Well, that is my point. I poured it out. 

 I had three men with a horse waiting for it, and the whole 

 business was thrown away. This was the same oil we have 

 been using six or seven years, mixing it in the same way. 



THE PRESIDENT : The manufacturers would probably 

 take it back if you had sent them a sample Mr. Frost might 



