THE CANADIAN HORTICULTURIST. 



mended to be used just)[before the 

 blossoms open, Bordeaux mixture and 

 Paris green when the fruit has set 

 copper acetate solution (8 oz. to the 

 barrel) when the fruit begins to color, 

 and a repetition of the treatment in case 

 of weather favorable to the rot. 



The prompt removal of rotted fruit is 



destroy them. The leaf curl was for 

 many years thought entirely uncontrol- 

 able, and peach growers viewed with 

 much alarm the wholesale destruction 

 caused by it in 1892, 1893, 1897 and 

 1898, when the abundance of cool rainy 

 weather in April and May favored its 

 development. 



Fig. 1592.— 



urged under all circumstances ; spray- 

 ing may or may not prove profitable. 

 The careful thinning of the fruit may 

 also be sometimes helpful in preventing 

 rot. 



PEACH CURL. 



Every year we add a little to our 

 knowledge of the fungus disease of our 

 fruit trees and learn better how to 



The leaf curl has been proved to be 

 caused by a minute plant parasite, 

 Exoascus deformans, which attacks both 

 the leaves and the new shoots, thicken- 

 ing and distorting the former and en- 

 larging the latter. The hyphae of the 

 fungus is easily recognised under the 

 microscope, the cells being more or less 

 triangular or wedge shaped. It lives 

 through the winter in the leaf buds, and 

 182 



