356 Refort of the Horticulturist of the 



has been added. Similar treatment was recommended for a vine- 

 yard near Cayuga lake that was very badly infested with anthranc- 

 nose in 1893. It was sprayed in the spring of 1894, with a saturated 

 solution of copperas, without adding sulphuric acid, and afterwards 

 was given the customary Bordeaux mixture treatment for other 

 vineyard diseases. The owner writes that the vines are now quite 

 healthy. Inasmuch as no untreated vines were left for comparison 

 this can not be looked on as a satisfactoi"y experiment, bnt this, and 

 other similar cases, furnish sufficient evidence of the value of 

 the copperas treatment to warrant the suggestion that vineyards 

 infested with anthracnose be given the treatment as above 

 described. It is hoped that careful tests of the value of this treat- 

 ment in American vineyards may soon be made. 



Black Rot. — This disease of the grape is quite prevalent in the 

 Keuka lake region and along the Hudson river, but so far as known 

 to the writer the Chautauqua region seems to be quite free from it. 

 It may usually be seen first on the leaves where it forms circular, 

 bright reddish brown, or pale brown, spots on which there appear 

 later little black dots or pimples. Within the black pimples are 

 developed the germs of the fungus which causes the disease. These 

 germs are given forth and washed by rain, or blown by wind, to 

 other leaves or fruit where they grow and form new diseased spots. 

 In the fruit it also forms circular spots and develops black pimples 

 like those formed on the leaves. The diseased fruit withers, turns 

 black, and becomes hard and shriveled, clinging to the stems some- 

 times till the following spring. The disease may also attack the 

 green shoots. 



Remedies. — All diseased fruit should be taken from the vineyard 

 since it is capable of spreading the disease the following spring. 

 Trimmings from the fruit containing diseased berries ought not to 

 be returned to the vineyard in the shape of compost as is sometimes 

 practiced, since the diseased berries are liable to spread the black 

 rot through the vineyard. 



This disease may be successfully controlled by thorough spraying 

 if done at the right time. Bordeaux mixture, 1 to 11 formula, is 

 used for this purpose. It is prepared as directed in article 4 on 

 Fungicides and Insecticides. The applications are made as fol ows 



1. Just as the pink tips of the first leaves appear. 



2. From ten days to two weeks after the first spraying. 



