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xip welL In 1916 we lost our whole crop of Mayflower from 

 rot, even with summer spray, and in 1917 half a dozen iso- 

 lated Mayflower trees, not dusted, lost nearly all of the fruit 

 through rot. On Carman we found the higher color, attribu- 

 ted to powdered arsenate of lead by our New York friend. 

 One Carman tree in a block of Champion was dusted twice, 

 and every peach it bore — a full crop — was sound and of 

 much richer color than fruit from the blocks of Carman trees, 

 dusted once. Champion, of which we have only a small num- 

 ber of bearing trees, is as bad a variety for brown rot as 

 Mayflower and we had equally satisfactory results with the 

 dust on Champion. 



We did not spray or dust Alberta. It resists rot better 

 than any variety we grow, and the curculio is not bad 

 -enough in our orchards yet to justify spraying or dusting for 

 this pest alone. We had no appreciable loss from brown rot 

 on a crop of about 9000 baskets of Elberta. 



To sum up, our experience with dust on peaches in 1917 

 gave us better results than we ever obtained with liquivl 

 spray, and at practically equal cost, considering all phases of 

 the mechanical side of both methods. The dusting is no 

 more disagreeable, when properly done, than liquid spraying, 

 and dusting certainly permits of the work being done more 

 nearly when it should be done. 



It would be a rash statement to say that dusting estab- 

 lished its superiority over liquid summer spraying for peach- 

 es after only one season's experience. It is a fair statement 

 that the results obtained in dusting in 1917 indicates strongly 

 the advisability of using dust for summer work on peaches, 

 and I hope we may have opportunity the coming season to 

 carry on this work to a point where we can tell you definitely 

 which of the two methods — dust or spray — has proven itself 

 the better for our conditions. (Applause) 



MR. FULLER : I would like to know when you dust. 



MR. HACKETT : At exactly the same time you would 

 apply the summer liquid spray — when the peaches are 

 formed and begin to shed the shuck, jou should spray or dust 



