New York Agricultural Experiment Station. 359 



eight ounces of copper carbonate mixed with one pound of ammonic 

 carbonate and dissolved in forty-five gallons of water, was given 

 just before the blossoms opened. Immediately after the blossoms 

 fell the trees were pprayed with Paris green, one pound to three 

 hundred gallons of water, to kill the curculio and after twelve days 

 this treatment was repeated. About a month later the trees were 

 sprayed with the mixture used in the second treatment. As a 

 result of these sprayings the trees lost considerable foliage but the 

 yield of good, sound fruit was much increased as compared with the 

 untreated trees. Further experiments are necessary to determine 

 the line of treatment that may be relied on to give the best results. 

 Care should be used in spraying as noted in the first paragraph 

 under the subject of the " Peach." 



Leaf Curl. — This is a disease whicli causes the leaves to curl 

 and drop early in the summer. It is caused by a fungus which 

 lives within the twig as well as in the leaf. 



Remedies. — Some orchardists claim that good results have fol- 

 lowed the use of Bordeaux mixture sprayed on the young foliage 

 soon after the leaves appeal-. Careful experiments need to be con- 

 ducted to determine the extent to which the disease may be pre- 

 vented by spraying. Since the fungus infests the twigs it appears 

 unwise to get cions or buds from trees that have shown the disease, 

 although so far as known to the writer, it has not yet been demon- 

 strated that the disease may be propagated by using diseased cions 

 in budding or grafting. Note the first paragraph under the subject 

 of the " Peach " concerning spraying. 



Yellows — The best known treatment for peach yellows is to 

 cut out and burn the diseased trees. The text of the New York 

 State law on this subject is given on page 363. 



Borers. — The peach is subject to the attacks of more than one 

 kind of borer. The trunks should be examined carefully in spring 

 and fall and the borers removed with wire or knife. Their presence 

 may often be detected by gummy exudations mixed with the cast- 

 ings of the insect. 



CuFiccLio. — The plum curculio sometimes is a serious pest in the 

 peach orchard. Remedies for this insect are discussed under " Plum 

 Curculio." 



Pears. 



Blight. Fire Blight. — This disease shows itself in the dying 

 of entire twigs, large branches or even the tree itself. It is generally 



