拿敌稳防治黄瓜白粉病应用研究

Study on Application of Nativo in Controlling to Cucumber Powdery Mildew

以"郑黄3号"黄瓜为试材,采用浸种及茎叶喷雾处理的方法,研究了拿敌稳对不同生长时期黄瓜植株生长的影响,并进行了防治白粉病的田间药效试验,综合评价了拿敌稳对黄瓜白粉病的防治效果。结果表明:拿敌稳浸种对白粉病的发生具有较好的预防效果,对黄瓜株高和根长的抑制率、茎周增长率与已唑醇相比均较低;拿敌稳60mg/L处理在幼苗期和开花期施药对黄瓜株高的抑制率分别为15.62%和4.65%,显著低于已唑醇;拿敌稳对黄瓜白粉病的田间防治效果为73.82%～84.26%,与己唑醇防效相当,明显高于甲基托布津的防效。该试验结果表明,拿敌稳对黄瓜生长安全且对白粉病有较好的防治效果,是防治白粉病的较好轮换药剂。

Taking ＇Zhenghuang 3＇ cucumber as material,the effect of nativo on cucumber growth was studied by soaking seeds and spraying it on seedling respectively,while field trial was also conducted to evaluate the control efficacy of nativo to cucumber powdery mildew.The results showed that nativo had a good control effect on cucumber powdery mildew,while plant height,root length and increase rate of stem diameter were significant lower than that of hexaconazole after seed-soaking treatment.Rate of plant height inhibition were 15.62% and 4.65% at cucumber seedling and florescence period after spraying treatment with concentration of 60 mg/L,which were significantly lower than that of hexaconazole.The control efficacies were 73.82%~84.26% in field trial,which was as good as that of hexaconazole but was higher than that of topsin-M.The study showed that nativo was safe to cucumber and efficacious to powdery mildew.It can be used as an alternative chemical to control cucumber powdery mildew.