张硕佳, 王超杰, 徐博, 冉刚超, 曹立冬, 曹冲, 黄啟良, 朱峰, 赵鹏跃. 五种杀菌剂在水稻上的吸收与传导性能研究[J]. 农药学学报, 2022, 24(4): 752-761. DOI: 10.16801/j.issn.1008-7303.2022.0042
    引用本文: 张硕佳, 王超杰, 徐博, 冉刚超, 曹立冬, 曹冲, 黄啟良, 朱峰, 赵鹏跃. 五种杀菌剂在水稻上的吸收与传导性能研究[J]. 农药学学报, 2022, 24(4): 752-761. DOI: 10.16801/j.issn.1008-7303.2022.0042
    ZHANG Shuojia, WANG Chaojie, XU Bo, RAN Gangchao, CAO Lidong, CAO Chong, HUANG Qiliang, ZHU Feng, ZHAO Pengyue. Study on uptake and translocation of five fungicides in rice[J]. Chinese Journal of Pesticide Science, 2022, 24(4): 752-761. DOI: 10.16801/j.issn.1008-7303.2022.0042
    Citation: ZHANG Shuojia, WANG Chaojie, XU Bo, RAN Gangchao, CAO Lidong, CAO Chong, HUANG Qiliang, ZHU Feng, ZHAO Pengyue. Study on uptake and translocation of five fungicides in rice[J]. Chinese Journal of Pesticide Science, 2022, 24(4): 752-761. DOI: 10.16801/j.issn.1008-7303.2022.0042

    五种杀菌剂在水稻上的吸收与传导性能研究

    Study on uptake and translocation of five fungicides in rice

    • 摘要: 茎叶喷雾是当前化学农药最常用的施药方式,但是存在着农药蒸发飘移、弹跳碎裂、因过度铺展而脱靶流失等缺陷,导致农药利用率低。通过研究农药在植物体内的吸收及传导性能,选择合适的农药研发根部施药的剂型与技术,能够降低环境因素对农药有效成分的不利影响,并通过农药的缓慢释放与剂量调控维持更长时间的药效,从而有效提高农药利用率。本研究以室内营养土和营养液两种模式培育的水稻为模式作物,研究了三环唑、噻呋酰胺、己唑醇、氟环唑和嘧菌酯5种不同类型的杀菌剂在水稻苗期植株中的吸收与传导行为。结果表明,这5种杀菌剂均可以被水稻幼苗根系吸收并向上传导,但效率存在差异。在营养土和营养液培养条件下,水稻幼苗根部的三环唑含量在4 h~2 d内明显高于茎叶部,施药5 d后三环唑在水稻中的转运因子值均大于1,说明三环唑具有良好的向上传输性能,而其他农药向上传输的能力较差。相比其他4种农药,三环唑更适合加工成根部施用的剂型,更易于通过水稻根部吸收后向上传输与分布,以有效防控茎叶部病害。该结果可为根部施用的药剂研发提供思路,为农药根部施药技术的发展提供指导。

       

      Abstract: Foliage spray is the most commonly used method of chemical pesticide application at present, but it has some defects such as evaporation, drift, bounce, rupture, and excess spread, resulting in low utilization of pesticides. Through the investigation of pesticide absorption and conductivity and the selection of appropriate pesticides for root application, the adverse effects of environmental factors on the active pesticide ingredients will be reduced. Longer efficacy can be maintained through slow release and dose regulation of pesticides to effectively improve the utilization of pesticides. In this paper, the absorption and conduction behaviors of five different types of fungicides (tricyclazole, thifluzamide, hexaconazole, epoxiconazole, azoxystrobin) in rice seedlings were studied through indoor nutrient soil and nutrient solution cultivation modes. The results showed that all the five fungicides could be absorbed and transmitted upward in rice seedlings, but the transmission performance was affected by the nature of the pesticides themselves. Under both cultivation conditions of nutrient soil and solution, the dose distribution of tricyclazole in the roots of rice seedlings was significantly higher than that in the aerial portions within 4 h-2 d, and the translocation factor (TF) values of tricyclazole in rice were all greater than 1 after treatment 5 days. It was shown that tricyclazole had the best upward transmission performance, while the other four pesticides showed poor upward transmission ability in rice. Tricyclazole is the most suitable for root application and the easiest to be absorbed by the root of rice and upward transmitted to leaves for the resistance to pathogen infections. This study can provide technical guidance for the pesticide selection of root application and the theoretical basis for the scientific and rational use of pesticides.

       

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