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介绍了50%吡蚜·噻嗪酮水分散粒剂的制备方法,简述了该制剂的特点、配方筛选、质量技术标准和贮藏稳定性。实验结果表明,该产品分散性好,悬浮率75%以上,热贮合格,14 d分解率很小,各项指标符合水分散粒剂的要求。田间试验效果表明,该药剂防治水稻稻飞虱药后1 d,7 d,16 d防效分别为67.88%,94.68%,96.85%,明显高于吡蚜酮和噻嗪酮单剂的药效,是值得开发和推广的新型防治水稻稻飞虱的复配产品。
The preparation method of 50% pymetrozine / buprofezin water dispersible granule was introduced. The characteristics, formulation screening, quality technical standard and storage stability of the preparation were described. The experimental results show that the product has good dispersibility, the suspension rate is more than 75%, the heat storage is qualified, and the decomposition rate is very small after 14 days. All the indexes accord with the requirements of water dispersible granule. The results of field trials showed that the control efficacy of the pesticide on rice planthopper after 1 d, 7 d and 16 d was 67.88%, 94.68% and 96.85% respectively, which was significantly higher than that of pymetrozine and buprofezin , Is worth to develop and promote new rice planthopper compound products.