The experiment was conducted to study the effect of isothiocyanate on tomato to prevent fungal diseases. Comparison exper-iment of the 20％isothiocyanate EW with the dosage of 45, 75, 105 L·hm-2 and traditional chemical control, including 50％Carben-dazim WP 22500 g+3％ Phoxim GR 90000 g and 70％ Thiophanate-methyl WP 7500 g+3％ Phoxim GR 90000 g, were studied for the fungal control effect on tomato using drip irrigation system in greenhouse. The results showed that the biocontrol effect of isoth-iocyanate on tomato fungal diseases was better than the traditional chemical control, and the effect was best when the dosage of 20％isothiocyanate EW was 105 L·hm-2. In addition, the biocontrol effect of isothiocyanate was safer than the chemical control, so isothio-cyanate could be applied to tomato cultivation to prevent the fungal diseases .%为研究生物消毒剂辣根素对番茄真菌病害的防治效果,试验开展了20％辣根素水乳剂45,75,105 L·hm-2与农户常用于前期预防和土壤处理的50％多菌灵可湿性粉剂22500 g+3％辛硫磷颗粒剂90000 g及70％甲基硫菌灵可湿性粉剂7500 g+3％辛硫磷颗粒剂90000 g的对比试验,通过滴灌施药的方法对设施番茄的定植前土壤进行消毒处理,调查各处理对番茄根腐病和茎基腐病的防效.结果表明,各剂量20％辣根素对番茄根腐病和茎基腐病的防治效果均显著优于多菌灵+辛硫磷和甲基硫菌灵+辛硫磷的常规配方,其中以20％辣根素水乳剂105 L·hm-2剂量效果最佳,利用辣根素防治番茄真菌病害的安全性较高,可在天津市设施园区番茄真菌病害防治中应用推广.
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