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DRUG PLANTS 



Ind • Control of Diseases of Peppermint and Spearmint , Study 



(l) control of important diseases of said plants through 

 disease resistance; (2) value of foliar and soil application 

 of chemicals in combination with other cultural practices for 

 control of Verticillium wilt; (3) value of new fungicides for 

 control of mint anthracnose, rust, mildew, and other foliar 

 and root diseases; (4) ^mechanisms of pathological wilting of 

 plants infected with Verticillium albo-atrum . 

 Pl» Path., Bot, 842 



MLch. Investigations on the Verticillium Disease of Mint . To 



produce by breeding a new strain of peppermint resistant to the 

 Verticillium wilt disease of mint, 

 Bot., PI, Path, 37 



Or eg. Control of !fi.nt Diseases , (1) By annual survey,' leam 



current extent and severity of Verticillium wilt; by field test 

 leam best practical rotation to nonsuscept crops, practicability 

 of chemical soil treatment for control, effect of adding specific 

 crop residues to soil on spread and severity of wilt, if cultural 

 practices are contributing to spread and severity of wilt; by 

 laboratory and greenhouse experiments test promising soil chemicals 

 for wilt control and systemic chemicals for control; (2) con^ilete 

 field testing of nematocides having shown outstanding control in 

 two years of preliminary tests; (3) develop varieties of pep- 

 permint and spearmint resistant to rust and wilt-resistant varieties 

 developed by USDA, 



Bot,, PI, Path, 120 



