• Title/Summary/Keyword: rice stern borer

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Studies on the Toxicity of Insect Growth Regulators against the fall Webworm (Hyphantria cunea Drury) and the Rice stem Borer (Chilo suppressalis Walker) I. comparisons of Insecticidal Activities against Various Instar Stages (미국흰불나방과 이화명나방에 관한 곤충 발육 저해제의 독성연구 I. 령기별 살충력 효과 비교)

  • 이인환;이형래;김정화
    • Korean journal of applied entomology
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    • v.33 no.2
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    • pp.81-87
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    • 1994

  • The experiments were canied out to investigate the toxicological characteristics of Insect Growth Regulators (IGRs) such as chlorfluazuron, diflubenzuron, pyriproxyfen and tebufenozide against the various stages of instars of fall webwom (Hyphantrio cuneo Dmy) and nce stem borer (Chiio suppressaiis Walker). In fall webwom, the tolerance ratio m) with the 2nd-6th instars, as cornpared with LCso of the 1st instar, ranged 107-358, 1.13-6.06, 1.02-3.23 and 1.05- 6.64, respectively. In the rice stern borer, the TR of the 3rd instar, as compared with LCso of the 1st instar, to chlorfluazuron, diflubenzuron, pyriproxyfen and tebufenoz~de were 2.86, 260, 19.80 and 15.30, respectively.

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