115 



foliage that has been covered with spray before they are 

 killed. To illustrate what I mean in that case, my rules for 

 tlie gypsy moth spraying are : to commence with arsenate of 

 lead at the rate of one pound to eight or ten gallons of 

 water, and every ten days I increase the strength by reduc- 

 ing the amount of water two gallons, but you will have 

 trouble if you try to control those three insects with one 

 spraying. In fact, if the infestation is bad, I do not believe 

 you can save your foliage. 



A MEMBER : I would like to ask a question about the 

 control of the pear psylla. ^Mr. Parrott says it is easy to 

 control it with oil. 



PROF. PARROTT: Miscible oil and nicotine and soap 

 are tAvo of the treatments we recommend for the winter 

 spraying of trees to destroy the flies that may be on them. 

 After the green tissues appear you cannot use miscible oils. 

 Use miscible oils in the usual proportion, about 1 to 15 or 1 

 to 20, to destroy the flies that happened to be on the trees 

 in the dormant state ; when the green tissues appear, use 

 nicotine and soap. 



A ME]\IBER : I would like to ask Professor if he has 

 uver used Scalicide for the pear blight? 



PROP. PARROTT .- No. 



A ]\fE]\IBER: I think I have been helped a good deal by 

 the use of this in my orchard. 



PROF. PARROTT: We have had no experience with 

 that mixture for combating that disease. 



A MEMBER: I would like to ask the professor if he 

 knows of anytliing that will help stop the canker, in apple 

 trees especially. 



PROF. PARROTT: The method they are following in 

 New York for fighting apple canker and pear blight is to 

 encourage fruit growers to examine their trees during the 

 late fall and spring for hold-over cankers on the trees and 

 cut them out and disinfect the wounds with corrosive sub- 

 limate or copper sulphate solution. In case of fire blight 

 of blossoms it is advised that the pear grower go through 



