Southern blight is a common disease on crops,and also a major disease affecting the cultivation and production of konjak.Studies have shown that its sclerotium has no dormancy period,and has the characteristics of strong tolerance to extreme environment,long incubation period and easy transmission.Therefore,removing the pathogen with pesticides is the main method for planting konjak.In order to reduce the incidence of southern blight during the cultivation of konjak,organic fertilizers were used for the inhibition of the pathogen,and three kinds of organic fertilizers,including livestock manure,biogas residue and wood vinegar,were selected to analyze the growth inhibition of the pathogen by single factor and response surface methodology.The test accuracy was systematically analyzed from three aspects: fertilizer concentration,fertilizer amount and fertilizer frequency.The results show that when the fertilizer concentration is 20g/L,the fertilizer frequency is 2 and the fertilizer amount is 3g,the growth of southern blight pathogen can be well inhibited.
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