1Zhengzhou Fruit Research Institute，Chinese Academy of Agricultural Sciences，Henan Key Laboratory of Fruit and Cucurbit Biology，Zhengzhou 450009，Henan，China；2Zhongyuan Research Center，Chinese Academy of Agricultural Sciences，Xinxiang 453500，Henan，China
Abstract：In order to explore plant immunoinducer with control effect to watermelon virus disease，taking zucchini yellow mosaic virus（ZYMV）as control object，plant pathogenicity and relative control efficiency as indicators，this paper evaluated 6 agents with different concentrations，including picolinic acid（Pip），N-hydroxy-picolinic acid（NHP），gallic acid，benzothiadiazole（BTH），chitosan，β-aminobutyric acid（BABA），and their two-agent and three-agent combinations for their control effects on this virus disease．The results showed that the control effect of single-agent on ZYMV in watermelon ranked from high to low as follows：NHP（0.5 mmol·L-1），Pip（2 mmol·L-1），chitosan（1 g·L-1），gallic acid（0.5 g·L-1），BABA（1 mmol·L-1），BTH（0.1 mmol·L-1）．In the combination agent experiment，the best control effect of the twoagent combination was 2- Ⅶ（NHP 0.5 mmol·L-1 + Pip 2 mmol·L-1）．Eleven days after inoculation，when incidence rate of the plant by control-treated water reached 100.00%，the incidence rate of the combinationtreated plants was 10.00%，and relative control effect was 89.99%．However，this combination agent would affect plant growth．The combination of 3 agents with better control effect were 3-Ⅰ（gallic acid 0.5 g·L-1 + NHP 0.5 mmol·L-1 + BABA 1 mmol·L-1）and 3- Ⅱ（gallic acid 0.5 g·L-1 + NHP 0.5 mmol·L-1 + Pip 2 mmol·L-1）．Their incidence rates were 27.27% and 33.33%，respectively，and their relative control effects were 79.49% and 68.27%，respectively，significantly higher than those of the other combinations．Among them，the incidence rate of the plants treated with 3-Ⅱ increased slowly，and disease control effect was more lasting than that of the other treatments．Thus，3-Ⅶ had the best control effect on ZYMV．The results indicate that NHP，Pip and gallic acid had potential application value in preventing watermelon virus diseases．
郝小苑1，刘卓文1，刘枫楠1，刘莉铭1，吴会杰1，古勤生1，康保珊1，2*. 几种诱抗剂对西瓜ZYMV的防治效果评价[J]. 中国蔬菜, 2024, 1(1): 60-67.
HAO Xiaoyuan1，LIU Zhuowen1，LIU Fengnan1，LIU Liming1，WU Huijie1，GU Qinsheng1，KANG Baoshan1，2*. Evaluation of Several Resistance Inducers’ Control Effects on ZYMV in Watermelon. China Vegetables, 2024, 1(1): 60-67.
