SWEET PEA DISEASES AND THEIR CONTROL 143 



Some growers merely coat the pipes with a paste made of flowers 

 of sulphur wliich seems equally efTective in controlling mildew. 

 Where fumigation is done it should be attended to carefully. Cool 

 nights or early in the morning is the time. to fumigate. 



There is, as yet, no remedy known to control the "streak" 

 disease, nor was there sufficient work done with fungicides to prove 

 that anthracnose might be controlled by spraying. Bordeaux 

 mixture may be valualjle if the spraying is started early, when the 

 seedlings are from two to three weeks old. If the disease has been 

 allowed to gain a foothold, spraying will then be of little value. 



Since "streak" is also a disease which attacks clovers as well as 

 many other legumes, it is essential to keep these hosts away from 

 our sweet pea plantations. 



More Knowledge Necessary. 



The subject of the diseases of the sweet pea has only been touched 

 upon by the writer. The investigations on sweet pea diseases, 

 carried on by the writer, were largely made possible through the 

 support of some private sweet pea enthusiasts, the late Mr. W. A. 

 Burpee being one of them. More investigations are necessary in 

 order to fully work out practical and efficient means of control. 

 Both the American Sweet Pea Society, as well as the Massachu- 

 setts Horticultural Society can do much towards this end. A 

 fellowship might be established in some reputable college, or some 

 state aid may be evoked to carry further the investigations of this 

 important subject. 



