216 The Canadian Horticulturist. 



"SPRAYING VS. JARRING" IN PREVENTING THE 

 ATTACKS OF THE CURCULIO. 



a 

 ^PINIONS in regard to the relative merits of "spraying" or 

 "jarring," in preventing the attacks of curculio, are exceedingly 

 varied, and, I think, always will be. This is owing to the 

 fact that some growers have the apparatus for spraying 

 advantageously and quickly, and have become accustomed 

 to this method of fighting the " little Turk," and so do not 

 care to change their appliances and ideas to suit any other 

 method. The same is true in regard to those who claim that 

 the cheapest and best method of fighting the curculio is by 

 the older system of jarring. 



I am not in a position, from personal experience, to speak more in favor of 

 one than the other. I notice, however, in a recent symposium in the Rural New 

 Yorker that while opinions seem to be pretty well divided, yet the majority, 

 including Professor Cook, an eminent entomologist, of Michigan, inclines to the 

 belief that better results can be obtained by jarring. 



Those who decide to jar should not forget, however, that their trees must 

 be first headed high enough to allow of easy approach by the operator of the 

 umbrella-like device arranged to catch the falling curculio. 



A system of close pruning or heading-in must also be practised in order to 

 keep the top of the tree within moderate bounds. 



Some interesting facts on the subject came into my hands last season as the 

 result of careful experiments conducted by Mr. R. B. Blake, of Cedar Springs, 

 Ontario, which I deem of sufficient value to give to the public through the 

 medium of the Canadian Horticulturist. Now that growers not only can, 

 hut should, spray to prevent the peach and plum rot, and owing to the fact that 

 Paris "Teen may be safely added to the Bordeaux mixture, which may be 

 considered a partial remedy for the peach and plum rot, it would seem that 

 spraying would be the more easily applied and prove the cheaper remedy of the 

 two. 



Mr: Blake, writing me last August, says : " I have one row of 36 Early 

 Canada's ; I started to jar them as soon as the little white peach got free from 

 the blossom. The following are the results for 12 mornings : — Off the 36 trees 

 first morning I collected on sheets, 198. This seemed to be too long a job to 

 continue, so I dropped 26 and kept on with 10 trees only, for the next eleven 

 days. Second morning, collected and destroyed 49 ; 3rd morning, 69 ; 4th 

 morning, 75 ; 5th morning, 82 ; 6th morning, 36 ; 7th morning, 53 ; 8th morn- 

 ing, 47 : 9th morning, 89 ; 10th morning. 68 ; nth morning, 84. At first not 

 a peach had been stung, but as I went on I found they had been attacked, and 



