Chemical Characteristics and Efficacy of Combined Pesticide Granules Formulated by Different Ways

제제방법별(製劑方法別) 혼합입제(混合粒劑) 농약(農藥)의 특성(特性)과 약효(藥效)

  • Oh, B.Y. (Agricultural Chemicals Research Institute, Rural Development Administration) ;
  • Park, Y.S. (Agricultural Chemicals Research Institute, Rural Development Administration) ;
  • Shim, J.W. (Agricultural Chemicals Research Institute, Rural Development Administration) ;
  • Kang, C.S. (Agricultural Chemicals Research Institute, Rural Development Administration) ;
  • Lee, H.R. (Agricultural Chemicals Research Institute, Rural Development Administration)
  • 오병열 (농촌진흥청 농약연구소) ;
  • 박영선 (농촌진흥청 농약연구소) ;
  • 심재완 (농촌진흥청 농약연구소) ;
  • 강창식 (농촌진흥청 농약연구소) ;
  • 이형래 (농촌진흥청 농약연구소)
  • Published : 1986.03.30

Abstract

A comparative study of chemical characteristics, efficacy and relative merits of extruded and coated granules, containing fungicide and insecticide, was conducted under laboratory and field conditions. Probenzole (3-allyloxy-1,2-benzisothiazole 1,1-dioxide) and carbofuran (2,3-dihydro-2,2-dimethyl-7-benzofuranyl methyl carbamate) were chosen as toxicants for rice blast(Pyricularia oryzae) and brown planthopper (Nilaparvata lugens) control, respectively. Stability of active ingredients in coated granule was superior to the extruded one under accelerated temperature. Active ingredient dissolution of coated one into distilled water showed slow release pattern. Pesticide residues in rice (Oryzae sativa, Chucheongbyeo) shoot applied with extruded one at the dosage of 3kg/10a retained higher levels than those with coated one on two days after application, while the residue levels were a reversed tendency on eight days after application. Efficacy on rice blast exhibited minute differences between the granules, on the other hand efficacy on brown planthopper by coated one was of higher rank than that by extruded one. Production cost of the combined pesticide granule by coating method could be cut down by 6% as compared to extrusion method.

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