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首页> 外文期刊>Weed technology >Response of Triallate-Resistant and -Susceptible Wild Oat (Avena fatua) Populations to Difenzoquat and EPTC in a Seedling Bioassay
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Response of Triallate-Resistant and -Susceptible Wild Oat (Avena fatua) Populations to Difenzoquat and EPTC in a Seedling Bioassay

机译：抗三叶酸酯和敏感性的野生燕麦种群（Avena fatua）在苗期生物测定中对敌草快和EPTC的响应

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摘要

A seedling bioassay was used to determine the response of triallate-resistant (R) and -susceptible (S) wild oat populations to difenzoquat and EPTC. The bioassay, based on seedling shoot length at 10 d after treatment, provided a reliable and rapid means of determining if wild oat populations were resistant to difenzoquat. Using a bioassay concentration of 15 ppm difenzoquat, it was possible to identify populations that were resistant to the recommended foliar-applied rate (0.85 kg ai/ha). Expected herbicide dosages that reduced shoot length by 50/100 (ED_50) derived from non- linear regression analysis indicated three and tow levels of response to difenzoquat among eight S and seven R populations, respectively, indicating within population variability in their response to difenzoquat.
机译：使用幼苗生物测定法来确定抗草酸盐的（R）和易感的（S）野燕麦种群对敌草快和EPTC的响应。基于处理后10 d苗苗长的生物测定法提供了一种可靠，快速的方法来确定野燕麦种群是否对敌草快有抗药性。使用浓度为15 ppm的苯草胺的生物分析，可以鉴定出对建议的叶面施用量（0.85 kg ai / ha）有抵抗力的种群。从非线性回归分析得出的预期苗长减少50/100（ED_50）的除草剂剂量分别表明8个S和7个R种群对敌草快的反应有3个和2个水平，这表明种群对敌草快的反应存在变异性。

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