Resistance of Chinese Cabbage to Plasmodiophora brassicae under Induction of Fluoro-substituted Benzothiadiazole Derivatives

doi:10.16409/j.cnki.2095-039x.2015.06.013

Abstract

Abstract: We investigated the resistance of Chinese cabbage against Plasmodiophora brassicae under induction by Fluoro-substituted benzothiadiazole derivatives (FBT), a novel inducer similar to benzothiadiazole (BTH) structurally. Staining with Hoechest3342/PI of P. brassicae spores showed that FBT treatment did not reduce vitality of the fungal spores. Pot experiments showed that control efficacy was 71.33%, better than that by fluazinam (63.32%), when Chinese cabbage plants were treated with FBT at 25 mg/L 3 times at an interval of 7 d. Field experiments showed that the control efficacy varied at an acceptable range for FBT, BTH and fluazinam. The highest control efficacy of FBT was 69.99%±2.01% at 25 mg/L.

Key words: Chinese cabbage, Plasmodiophora brassicae, fluoro-substituted benzothiadiazole derivatives, induced resistance

CLC Number:

S476

SHI Yanxia, HAN Zhiqi, XIE Xuewen, SONG Jiawei, CHAI Ali, LI Baoju. Resistance of Chinese Cabbage to Plasmodiophora brassicae under Induction of Fluoro-substituted Benzothiadiazole Derivatives[J]. journal1, 2015, 31(6): 907-912.

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