多菌灵及其复配制剂防治小麦赤霉病的应用效果 |
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引用本文:宋益民,丛国林,陈怀谷.多菌灵及其复配制剂防治小麦赤霉病的应用效果.植物保护学报,2018,45(2):352-358 |
DOI:10.13802/j.cnki.zwbhxb.2018.2016229 |
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中文摘要:为测定在小麦赤霉病菌Fusarium graminearum抗性频率上升的条件下多菌灵及其复配制剂对小麦赤霉病的防效,于2014—2016年监测了江苏省南通市同块试验田中小麦赤霉病菌对多菌灵的抗药性,并进行了田间药效试验。结果表明,2014、2015和2016年小麦赤霉病菌对多菌灵的抗性频率分别为22.97%、38.55%和43.38%,呈逐年上升趋势。2016年戊唑醇及复配剂多菌灵·戊唑醇、多菌灵·三唑酮处理对小麦赤霉病的田间防效分别达97.82%、92.16%、85.98%,增产效果分别达23.90%、23.54%、22.57%;小麦样品(混粒)中DON毒素含量分别比空白对照降低57.39%、59.99%、43.34%,均优于多菌灵单剂处理,其中以戊唑醇及复配剂多菌灵·戊唑醇处理最好,多菌灵·三唑酮处理次之。因此,在抗性程度中等或偏轻的地区,采用戊唑醇、复配剂多菌灵·戊唑醇防治小麦赤霉病可取得较好的防病、增产及降低DON毒素的效果。 |
中文关键词:多菌灵 复配制剂 小麦赤霉病 抗药性频率 DON毒素 |
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Efficacy of carbendazim and its mixtures for controlling wheat scab |
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Abstract:To determine the efficacy of carbendazim and its mixtures on controlling wheat scab in fields with increasing frequency of carbendazim-resistance isolates, the resistance of Fusarium graminearum populations to carbendazim was monitored in the same field from 2014 to 2016, and the efficacy of carbendazim and its mixtures were conducted correspondingly in 2015 and 2016. The results showed that the frequencies of resistant isolates against carbendazim were 22.97%, 38.55% and 43.38% in 2014, 2105 and 2016, respectively, with the trend rising year by year. Compared with the CK, the efficacy on wheat scab control of tebuconazole, carbendazim·tebuconazole and carbendazim·triadimefon treatments were 97.82%,92.16% and 85.98% in 2016, respectively, and the yields of three treatments increased by 23.90%, 23.54% and 22.57%, respectively. The DON concentration in wheat grains collected from plots of three treatments reduced by 57.39%, 59.99% and 43.34%, respectively. The tebuconazole treatment and carbendazim·tebuconazole treatment were the best of all treatments, and better than the mixture of carbendazim·triadimefon treatment. Therefore, tebuconazole or carbendazim·tebuconazole could be used as alternatives to control wheat scab and to increase wheat yield, meanwhile reduce grain toxin at the low and medium level areas of infectious. |
keywords:carbendazim combinations wheat scab resistance frequency DON toxin |
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