47 



for the red spider is dilute lime-sulphur, but it did not seem 

 practical on the raspberry in fruit. Perhaps, we could have 

 controlled it if we had sprayed earlier. 



MR. AIKEN : The only remedy I know of T.i to spray 

 and do a lot of it. 



A MEMBER : Did j^ou try a good spray of lime-sulphur? 

 Don't you think that would be efficient? 



PROF. WOLFE: Not having had any experience I can- 

 not say. 



PROF. PARROTT OF GENEVA : I was very much 

 interested in this discussion regarding raspberry diseases. 

 In the Hudson River Valley we have two diseases of rasp- 

 berries, which are very destructive. One is anthracnose 

 and the other, Avhich I surmise that gentleman is troubled 

 with, is known as i-aspberry yellows. It is a physiological 

 t^'ouble and there is no remedy for it, as I understand, and 

 I make this suggestion to the gentleman, that he collect some 

 of his plants and send them to the plant pathologist at the 

 Experiment Station at Amherst, to get the troul)le identi- 

 fied. Now this discussion is especially interesting to me at 

 this time because the red spider is brought into it. In the 

 Hudson River Valley there is a common opinion that the 

 red spider is responsible for raspberry' yellows. Our plant 

 pathologist claims that while the red spider is numerous on 

 raspberries they are not responsible for the unsatisfactory 

 condition of the plant, that this disease, raspberry yellows 

 is the causal organism which produces that disorder of th? 

 plants. 



THE CHAIR]MAN: We are very glad to have the re- 

 marks by Prof. Parrott. 



PROF. WOLFE : If you saw the red spider by the hmi- 

 dreds to the square centimeter, you would say that that was 

 a case of red spider? 



PROF. PARROTT: It might have something to do with 

 it. 



A MEi\IBER: Would it have to do with the curling of 

 the leaves? 



