514 Agricultural Experiment Station, Ithaca, N. Y. 



There are four diseases of the blackberry which may be mentioned 

 here, — the red rast or yellows, root-gall, anthracnose, and cane-knot. 

 Except the last, these diseases will be more fully described in 

 Bulletin 100, and they need not be discussed here. It may be said, 

 however, that all these troubles' can be kept at bay by keeping the 

 patch tidy, — cutting out all suspicious canes and bushes, and by 



96.— Cut by frost. 



clean and careful culture. The yellows {Coeoma nitens) or red or 

 orange inist of the leaves, is incurable, and the affected bush should 

 be pulled out and burned as soon as discovered. With this treatment 

 there is no difficulty in keeping a patch clean of the disorder. The 

 same remarks apply to the root-gall. Anthracnose, or pitting of the 

 canes, is less serious in blackberries than in black raspberries. It 

 can no doubt be kept in check by careful spraying with Bordeaux 

 mixture, as described in Bulletin 100 ; but I believe the most efficient 

 treatment is to cut out and bum the old canes just as soon as the 

 fruit is off, and to examine the bushes frequently for the disease and 

 to cut out the diseased shoots. If a patch became very seriously 

 involved, I should want to mow the bushes off close to the ground 

 in fall or early spring, clean out the crowns and spray them, and 



