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为明确2,2,2-三氟乙基苯并[1,2,3]噻二唑-7-甲酸酯(简称TBTC)对蔬菜病害的诱导抗病效果,以黄瓜霜霉病P seudoperonospora cubensis为研究对象,进行了该化合物在盆栽及田间小区条件下的诱导抗病试验。结果表明:TBTC对黄瓜霜霉病具有较好的诱抗活性,其中,盆栽试验中250mg/L处理的平均防效为77.50%±1.79%,对照诱导抗病剂苯并噻二唑(BTH)的平均防效是71.72%±2.58%,对照杀菌剂50%烯酰吗啉可湿性粉剂在有效成分500mg/L处理下的平均防效为71.46%±3.01%;两年的田间试验结果显示,TBTC250mg/L的处理对黄瓜霜霉病的最高防效达83.94%±2.09%,而BTH的最高防效为72.39%±2.91%,50%烯酰吗啉可湿性粉剂250mg/L的最高防效是89.08%±1.95%,表明TBTC对田间黄瓜的霜霉病可产生诱导抗病效果。
In order to clarify the disease resistance induced by 2,2,2-trifluoroethylbenzo [1,2,3] thiadiazole-7-carboxylate (abbreviated as TBTC) against vegetable diseases, the effects of P seudoperonospora Cubensis was used as the research object to conduct the disease resistance test of the compound under potted and field conditions. The results showed that TBTC had good anti-induced activity against cucumber downy mildew, of which, the average control effect of the treatment with 250mg / L was 77.50% ± 1.79% in the pot experiment, and the control induced the resistance agent benzothiadiazole (BTH) The average control effect was 71.72% ± 2.58%. The average control effect of 50% dimethomorph wettable powder was 71.46% ± 3.01% under the active ingredient of 500 mg / L. The results of field experiment in two years indicated that, TBTC250mg / L had the highest control effect on cucumber downy mildew reached 83.94% ± 2.09%, while the highest control effect of BTH was 72.39% ± 2.91% and the highest control effect of 50% dimethomorph wettable powder 250mg / L Is 89.08% ± 1.95%, indicating that TBTC can induce disease-resistant effect on downy mildew of cucumber in the field.