Konjak is not only a kind of food,but also a kind of medicinal material and an economic crop,which is widely distributed in Yunnan,Guizhou,Sichuan,southwestern Shanxi and western Hubei.However,two soil-borne diseases of konjak,soft rot and southern blight,restrict the development of konjak planting industry.In recent years,there are many researches on the control of konjak soft rot and southern blight,including the application of biological bacteria or biological fertilizer,soil disinfection,crop rotation and so on.Studies have shown that wood vinegar can inhibit and kill bacteria,regulate plant growth,promote plant photosynthesis,promote nutrient absorption and improve the quality of trees and fruits.In this paper,the white konjak was used as the test material to carry out field experiments,and the control effects of walnut shell wood vinegar at different temperatures and different dilutions on soil-borne diseases of konjak were explored in order to obtain the best treatment conditions.The results showed that when the walnut shell wood vinegar was diluted 600 times in K2 (180~300°C),the highest seeding rate of konjak reached 99.17; the disease resistance was the best,and the diseased plant rate was only 3.36; the average yield was the largest,reaching 148 g/clump.
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