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首页> 外文会议>220th American Chemical Society, Meeting 2000 Washington, D.C. >Diazinon in Apple Orchards: Dissipation from Vegetation and Exposure to Non-Target Organisms
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Diazinon in Apple Orchards: Dissipation from Vegetation and Exposure to Non-Target Organisms

机译：苹果园中的二嗪农：从植被中消散并暴露于非目标生物

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摘要

Comprehensive residue determinations were made for leaves, grass, and other biota from apple orchards following repeated applications of diazinon (D-z-n~R 50W). Orchards in Washington and Pennsylvania served as study areas representing different climatic zones and agricultural practices. Mean diazinon application was measured to be 3.0 to 3.1 kg Al/ha in over 230 samples from orchards in the states studied. Vegetation was collected in four orchards from each state on days 0,4, and 12 post application. Diazinon dissipation from vegetation was measured following repeated applications in Washington and Pennsylvania orchards. Residue dissipation was described by a simple exponential function r >0.93). The individual degradation rates measured in each field provide a distribution of diazinon presence that can be used for probablistic exposure assessments. It is also worthwhile to note that no significant exposure to earthworms or avian species occurred more than 4 days post application. Significant exposure to these non-target species occurred when at least 19% of applied residue remained on vegetation.
机译：重复施用二嗪农（D-z-n〜R 50W）后，对苹果园的叶子，草和其他生物区系进行了全面的残留测定。华盛顿和宾夕法尼亚州的果园是代表不同气候区和农业实践的研究区。在所研究州的果园中，对230多个样品测得的平均二嗪农施用量为3.0至3.1 kg Al / ha。在施用后的第0、4和12天，从每个州的四个果园收集了植被。在华盛顿和宾夕法尼亚州果园重复施用后，测量了植被对二嗪农的消散。残留消散由一个简单的指数函数r> 0.93来描述。在每个领域中测得的个体降解率提供了二嗪农存在的分布，可用于概率暴露评估。还值得注意的是，施用后超过4天没有发生no或禽类的显着暴露。当至少有19％的应用残留物残留在植被上时，就会发生大量与这些非目标物种的接触。

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