the black raspberries 



Pests of the Black Raspberry 



Anthracnose — This fungous disease ap- 

 pears as light, oval spots on the canes. They 

 interfere with the transfer of food materials 

 in the plant and as they enlarge and coalesce 

 they may prevent the ripening of the crop. In 

 a wet spring young shoots may be killed. 



The removal of fruiting canes soon after 

 harvest probably aids in checking this disease. 

 When it is serious, however, the plants should 

 be thoroughly sprayed with lime sulphur solu- 

 tion, as follows: 



( 1 ) In spring when plants are still dormant 

 use liquid lime sulphur about J4 pint 

 to each gallon of water. 



(2) About June first, use liquid lime sul- 

 phur about Yz pint to each three gal- 

 lons of water. 



(3) Just before blossoming, use same 

 material as in (2). 



Mosaic — (See page 45). On the black 

 raspberry this disease checks growth, kills the 

 growing tips and finally results in the death 

 of the plant. Clean nursery stock to start 

 with and later rogueing out of infested plants 

 is the only remedy known. 



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