103 



done in New York during the last two 3'ears in the niattet 

 of fall spraying to combat leaf curl. I am not making any 

 recommendations regarding its merits, but you will be in- 

 tvi-rested to know that owing to the difficulties experienced 

 by some of our peach growers who spray their peach trees 

 ill the spring to get the treatment' done in time, experiments 

 have been made both hy growers and experimental workers 

 to determine what could be derived by way of protection by 

 fall spraying. Quite a lot of experimentation has been 

 done along this line and for two years now excellent pro- 

 tection has followed the fall sprajdng of peach trees. 



MR. LEWIS: In spraying for green aphis when it ap- 

 pears in July or August on young trees, what solution do 

 you use? 



PROF. PARROTT: There are a number of mixtures 

 that can be used to fight green aphis on young trees. For 

 instance, soap twelve to twenty pounds, to 100 gallons of 

 water, or nicotine solution, i^sing three-fourths of a pint to 

 100 gallons of water and four pounds of soap. 



MR. LEWIS: Is it preferable to use the two? 



PROF; PARROTT: In the case of nicotine solution, I 

 would always use soap in order to give it adhering and 

 spreading qualities. Nicotine solution itself does not ad- 

 here and spread well over the insects. 



A ]MEi\IBER : I would like to ask a ciuestion right 

 there-: would you use soap with the lime mixture, arsenate 

 of lead and nicotine? 



PROF. PARROTT : Xo. this is a case of incompatabili- 

 ty of spraying materials; if you add soap to lime-sulphur 

 solution there is clanger of nasty paste-like mixture w^hicli 

 prevents the discharge of the spraying material through the 

 nozzles owing to the clogging of the suction strainer. 



A ME^IBER : Does the same apply to arsenate of lead? 



PROF. PARROTT: Arsenate of lead can be mixed with 

 lime-sulphur. 



A ^MEMBER : But do you get the clogging solution from 

 the soap with arsenate of lead? 



