Study on the control effect of 4 fungicides on the bacterial stem and root rot of sweetpotato
To identify effective fungicides for the prevention and control of sweetpotato bacterial stem and root rot,the effects of 4 fungicides were compared through different application methods.The results indicated that applying a diluted solution of 90％(mass fraction,the same below)chlorobromoisocyanuric acid to the root area via drip irri-gation during the early growth stage of sweetpotato seedlings achieved a control effect of 94.64％.Using 70％methylthiobacillin diluent to soak seedlings for 20 minutes before planting and drip irrigation after planting every 10 days,the control effect could reach 68.53％.The control effects were all less than 40％by using the diluent of Ke-ShaDe 3000(46％copper hydroxide),the 6％water diluent of chunremycin.Therefore,90％chloroisocyanate dilu-tions can be used as an effective control agent in the bacterial stem and root rot of sweetpotato.
sweetpotatobacterial stem and root rotfungicidecontrol effect
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