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STATE BOARD OF AGRICULTURE. 



Raspberries, Blackberries and Dewberries. 



Red raspberries, especially Ciithbert and Marlboro, frequently show 

 curled, distorted or mottled foliage. These are the signs of leaf-curl 

 and mosaic. Such plants are diseased and are a menace to other plants 



Fig. 8. Kaspberry curl. Plants affected with this disease should be removed and burned. 



in the plantation. They should be dug up with all their roots and suck- 

 ers and burned. Such diseased plants should be dug out in the early 

 half of the season to prevent spread of the disease by insects (aphids). 

 New plantations should be set only from shoots of healthy plants. 



A similar disease of black raspberries in which the nodes are 

 shortened, the leaves curled and distorted, has destroyed many planta- 

 tions. Eliminate all suspicious plants and use for new plantings only 

 stock from healthy sources. 



Crown gall, which shows up as a swollen, distorted knot on canes 

 and crowns is very serious on raspberries and blackberries and diseased 

 stock should never be used. 



Anthracnose, — a common and troublesome disease especially of black 

 raspberries and blackberries, identified by the grayish spots generally 

 near the bases of the canes. Recent spraying experiments prove the 

 necessity of three applications of lime-sulphur solution to control it, 

 applied — first, — in early spring just before growth begins, using 2i/2 

 gallons testing 33° Beaume, to 50 of water; second, — when the new 

 canes are six to eight inches long, using 1 gallon to 50; third, — just 



