Suppressive Effect of Verticillium Wilt on Chinese Cabbage Using Dazomet Within Mulch Rows

Verticillium wilt on Chinese cabbage, caused by Verticillium dahliae and V. longisporum, is one of the most important soilborne plant diseases that is difficult to control and can greatly reduce production. We tested the extent to which treatment of mulch rows with dazomet, which is easy to handle compared with other common treatments, could reduce the incidence of Verticillium wilt on Chinese cabbage. We conducted eight trials in a total of four plots during 2020 to 2022. The results of each trial were analyzed using a generalized linear mixed model. In the model constructed with diseased plants versus healthy plants data as the objective variable, the regression coefficient of the treatment of dazomet on the untreated (reference) was −1.60. The dazomet treatment was effective ( P < 0.01) in reducing Verticillium wilt incidence. Dazomet treatment inside mulch beds is highly practical as a new control technology for Verticillium wilt on Chinese cabbage because it has a large effect size, does not cause any chemical damage to Chinese cabbage, and is simple and labor-saving.