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

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.

Keywords

Steinernema carpocapsae All and Pocheon strain;S.glaseri NC and Dongrae strain;Heterorhabditis bacteriophora NC 1 strian;Meloidogyne hapla;Egg mass

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