• Title/Summary/Keyword: Nonfumigant nematicides

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Effects of Incorporation Method of Nematicides on Reproduction of Meloidogyne arenaria (살선충제의 처리방법에 따른 뿌리혹선충 방제효과)

  • 김동근;최성국
    • Korean journal of applied entomology
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    • v.40 no.1
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    • pp.89-95
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    • 2001
  • Effects of application method of eight nematicides on reproduction of iweloidogyne arenaria were tested in pot. In pre-treatment, cadusafos , dazomet, fosthiazate reduced over 90% in number of egg masses of M. arenaria at recommended rate . Carbofuran showed similar reduction only at three times of recommended rate. Benfuracarb was the least effective. Post-treatments, in general, were less effective than pre-treatment except fostiazate which reduced root egg mass of iW. arenaria as much as pre-treatment at recommended rate . Systematic nematicide, fosthiazate has potential as post-treatment nematicide.

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Effects of Treatment Time of Cadusafos and Fosthiazate for the Control of Meloidogyne arenaria on Oriental Melon (카두사포스와 포스치아제이트 처리시기에 따른 땅콩뿌리혹선충 방제효과)

  • 김동근;김진배;이재국;최성국;윤재탁
    • Korean journal of applied entomology
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    • v.41 no.4
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    • pp.293-298
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    • 2002
  • Cadusafos and fosthiazate were applied at the rate of 1.8 g a.i./6$\m^2$ as pre-plant or pre-plant+post-plant treatments on winter-grown oriental melon in a greenhouse soil infested with Meloidogyne arenaria. Nematicides reduced root-knot nematode population from 35 to 90% compared with control; fosthiazate was better than cadusafos (P = 0.003) and fosthiazate pre-plant+post-plant application reduced nematode population densities as much as 90%. Nematicides increased yield in an average of 23% (11-38%) in May, 39% (2-65%) in June, and 31% (12-46%) for the total (P = 0.085). The residue in the fruit of oriental melon by post-plant treatment of fosthiazate exceeded maximum residue limit of 0.2ppm, while the Cadusafos residue was below the limit. It is concluded that fosthiazate cannot be used as a post-plant treatment in winer-grown oriental melon with overall consideration, i. e., danger of residue, value of melon, costs of nematicide, consumer demand on safer agricultural products, and effects of fallow.

Effects of Chemical Treatments on Population Changes of Ditylenchus destructor and Responses of Panax ginseng (감자썩이선충의 밀도변화(密度變化)와 인삼생육(人蔘生育)에 대(對)한 약제처리(藥劑處理) 효과(效果))

  • Ohh, S.H.;Yu, Y.H.;Cho, D.H.;Lee, J.H.;Kim, Y.H.
    • Korean journal of applied entomology
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    • v.25 no.3 s.68
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    • pp.169-173
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    • 1986
  • Ginseng fields abolished by potato rot nematode (Ditylenchus destructor) (heavily infested with the nematode) were treated with selected nematicides after preplanting treatment with fumigants or non fumigant chemicals in the fall of 1982. Suppression of the nematode populations was noted in the fields fumigated by cylon (Cy) and treated with ethoprop (E) or triazophos (T). Also in these treatments, high percentages of shoot sprouting and low nematode damages were observed. In the fields fumigated by Cy, subsequent treatments with nonfumigant nematicides such as E, aldicarb (A), phenamiphos (Ph), oxamyl (O) and carbofuran (C) during cultivation had no effect on the significant decrease of the nematode, compared with Cy alone. No differences in shoot sprouting and symptom appearance were observed; however, survivalities of plants and root weights of 4-year old ginseng were high in A and E or E following preplanting treatment with E. Correlation coefficients of the nematode densities to host responses such as sprouting of shoots, symptom appearance, survivality of plants and weight of 4-year old ginseng roots were significant at and mostly before and after the time periods of survey.

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