Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Effect of Entomopathogenic Nematodes on Egg Mass Formation by the Northern Root-knot Nematode, Meloidogyne hapia

곤충병원성 선충이 당근뿌리혹선충의 난낭 형성에 미치는 영향

  • 김형환 (농촌진흥청 원예연구소 원예환경과) ;
  • 추호렬 (경상대학교 농생물학과 응용생명과학원) ;
  • 조명래 (농촌진흥청 원예연구소 원예환경과) ;
  • 전흥용 (농촌진흥청 원예연구소 원예환경과) ;
  • 임명순 (농촌진흥청 원예연구소 원예환경과)
  • Published : 2002.09.01
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Abstract

The entomopathogenic nematodes, Steinernema carpocapsae All strain (ScA), S.glaseri NC strain (SgN) and H. bacteriophora NC 1 strain (HbN), were evaluated for the effects on egg mass formation by the northern root-knot nematode, Meloidogyne hapla in pot experiment using tomato. In the first experiment, 2.5$\times$10$^{5}$ infective juveniles (Ijs) of entomopathogenic nematodes were inoculated to 100 g of the soil infected with ca. 450 Ijs of M. hapla/100 ㎤ in 150 $mell$ container. The number of egg mass was significantly decreased to 9.4-36.5 in ScA, to 5.7-24.7 in SgN and to 11.2-16.0 in HbN treatments compared with 62.5 in M.hapla alone. In the second experiment, ScA and S.carpocapsae Pocheon strain (ScP) and SgN and S.glaseri Dongrae strain (SgD) were treated to 350 g of the soil infected with 100, 200 M.hapla larvae/100 ㎤ in 450 $mell$ container The entomopathogenic nematodes were inoculated at the rate of 2,020 Ijs and 1.6$\times$105 Ijs in 350 g soil. The number of egg mass of M.hapla were significantly decreased in the entomopathogenic nematode treatments compared with M.hapla alone although no differences were observed among Steinernema species, strains, or infection concentrations. Treatments of entomopathogenic nematodes 3 days before M.hapla inoculation were more effective on reduction of egg mass formation than those of 3 days after M.hapla treatments. Growth of tomato was not affected by entomopathogenic nematode treatments.

곤충병원성 선충인 Steinernema carpocapsae All (ScA)과 포천(ScP) 계통, S.glaseri NC (SgN)와 동래(SgD) 계통, Heterorhabditis bacteriophora NC 1 계통(HbN)이 당근뿌리혹선충 (Meloidogyne hapla)의 난낭 형성에 미치는 영향을 구명하기 위하여 토마토를 이용한 pot실험을 수행한 결과는 다음과 같다. 450마리의 당근뿌리혹선충이 있는 100g 토양에 곤충병원성 선충을 2.5$\times$$10^{5}$ 마리 농도로 처리한 결과 ScA처리에서 9.4-36.5개, SgN처리에서 5.7-24.7개, HbN처리에서 11.2-16.0개로서 당근뿌리혹선충 단독 처리에서의 62.5개보다 난낭수가 매우 적었다. Steinernema선충을 100㎤당 100마리, 200마리의 당근뿌리혹선충에 대해 2,020마리/토양 350g와 1.6$\times$$10^{5}$ 마리 농도로 처리한 결과 Steinernema 선충의 종간, 계통별 또는 처리농도 간에는 난낭수의 차이가 없었으나, 당근뿌리혹선충 단독 처리와 비교하면 난낭수가 현저히 감소하였다 곤충병원성 선충을 당근뿌리혹선충 처리 3일 전에 처리한 것이 3일 후에 처리한 것보다 난낭 형성 억제에 더 효과적이었다. 한편, 곤충병원성 선충은 토마토의 생육에 아무런 영향을 끼치지 않았다.

Keywords

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