CULTIVATION 



order to secure the proper results, to spray as soon 

 as the buds begin to open earl}- in the spring, and 

 for this early spraying two tablespoonfuls of com- 

 mercial formaldehyde are diluted in a gallon of water; 

 for later spraying when the plant is in full growth 

 one-half strength is used, i. e., one tablespoonful to 

 a gallon of water, and the weaker spray used at 

 intervals of a week or ten days through the growing 

 season. "VMiere black spot has gained a firm hold on 

 the plants, it is also advocated that a solution of 

 double strength be used in February. 



Professor L. 'M. Massey and Professor WTietzel, 

 of Cornell, are making investigations of diseases of 

 roses. This work is most valuable and considerable 

 progress has been made in dividing and classifying. 

 It has been discovered that there are a number of 

 different diseases which have generally been desig- 

 nated as black spot. 



In this connection, it is most important that this 

 research be given all the help possible throughout 

 the country by rose growers, as the workers are most 

 anxious to have specimens showing diseases on rose 

 bushes sent to them. It would be best, where the 

 entire plant is affected, to send the plant with the 

 roots, but the soil is not of any moment. In the case 

 of leaves, it is better not to wet them but to place 

 in newspaper, and send by mail. 



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