散布むらの改善と粉剤粒子の分級

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site Web Site 被引用文献1件

書誌事項

タイトル別名
  • Improvement in Distribution of BPMC Deposits and Classification of Dust Particles
  • 散布むらの改善と粉剤粒子の分級〔英文〕
  • サンプ ムラ ノ カイゼン ト フンザイ リュウシ ノ ブンキュウ エイブン
  • Studies on the Pest Control Method Utilizing Boom-type Blow Heads in Paddy Fields (Part 2)

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A power duster of large maximum air volume (DMD11E) provides faster airflow in the blow head and at the blow holes. With its capacity, such as DMD11E contributes to improve distribution of o-sec-butylphenyl methylcarbamate (BPMC) deposits. High control of brown rice planthoppers was possible when insecticidal dusts were applied with such a DMD11E. Buprofezin having vapor action and high insecticidal activity could be applied with a DMD11E with a boom-type blow head. The relationship between the horizontal and vertical deposits of BPMC at the base of rice plant was improved by the use of a power duster of large air volume, and the slope of the regression line of less-drifting dust (DL) was about the same as that of regular dust (RD). Application with a shortened blow head, in contrast, resulted in extremely small deposits of BPMC and in inferior insect control at the end zone of the blow head. Deposition of BPMC in rice plants decreased at the heading stage, but increased at the yellow-ripe stage. The diameters of deposited dust particles of RD were mostly less than 10μm, while particles of 20 to 40μm diameter were predominant in DL. The amount of BPMC per 1mm2 surface area of a particle deposited on a horizontal surface was 0.11μg/mm2 in RD and 0.03μg/mm2 in DL, and that on a vertical surface 0.20μg/mm2 in RD and 0.05μg/mm2 in DL. This may be the reason for high control of brown rice planthoppers by RD.

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