Studies on the protection of rice blast by root absorption of the chemicals

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Other Title
  • 薬剤の根部施用によるいもち病防除に関する研究 II
  • IBPの2, 3イネ病害虫に対する防除効果
  • II Protective effects of IBP for some diseases and pests of rice plants

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Protective effects of IBP (O, O-diisopropyl-S-benzylthiophosphate) granules were investigated against some diseases and pests of rice plants.<BR>IBP was the most effective for control of culm rot caused by Helminthosporium sigmoideum var. irregulare Crally et Tullis, in application 7 days before the heading stage and still effective 33 days. In the pot test, application of IBP before inoculation with the fungus showed about the same protective effect for culm rot as that after the disease occurrence by the inoculation. Therefore, it was found that culm rot had longer effective period for the application of IBP than blast.<BR>IBP showed also the same protective effects as organic arsine compounds to sheath blight and NAC (n-methyl-l-naphthyl carbamate) wettable powder to the brown plant hopper.<BR>Fungicidal activities of IBP against H. sigmoideum var. irregulare and sheath blight fungus, Pellicularia sasakii (Shirai) S. Ito, were not so strong in vitro that mechanism of action of IBP on culm rot and sheath blight diseases seemed not to be attributed to the direct fungicidal activities to these fungi themselves.<BR>On the one hand, IBP gave a certain degree of protective effect against brown spot and hogare, but no effect against the rice stem borer.

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Details 詳細情報について

  • CRID
    1390282680440271360
  • NII Article ID
    130004642464
  • DOI
    10.4165/kapps1958.13.0_7
  • ISSN
    03871002
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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