Study On Control Efficiency And Fungicide Selection Of Tobacco Brown Spot

Tobacco Brown Spot is a worldwide tobacco fungus diseases. At present, tobacco brown spot disease prevention by chemical control measures. So the medicament screening become an important part of the prevention of tobacco brown spot disease. The aim was to select parts (10) of fungicide for controlling tobacco brown spot and to provide basis for fungicide se lection. The experiment about the medicament screening of10fungicides against tobacco brown spot. The result show that:a variety of fungicides had a certain effect on the control o f tobacco brown spot. And the effective control can be got by using the follow5fungicides dimethachlon (wenzhou)、 dimethachlon (heyi).45%sclerotium. cuprum、45%dimetachlone Hu ketone、40%sclerotium. cuprum, the average controlling effect reached77.99%.84.36%、71.31%、74.06%、79.48%.And the average controlling effect of polyoxins.19%hymexazol. copric tetramminosulfate. polyoxybiotic solvent reached62.61%、60.63%、63.88%.40%dimethyl pyrimidine amine and difenoconazole control effect is poorer, the average controlling effect was55%.56.92%. The controlling of tobacco brown spot in production should alternately use the5bactericides, dimethachlon (wenzhou). dimethachlon (heyi).45%sclerotium. cuprum、45%dimetachlone.hucopper.40%sclerotium、cuprum.