Comparison of Predation Rates of Three Phytoseiid Mite Species on Citrus Red Mite (Panonychus citri McGregor) on Citrus Tree

감귤원에 발생하는 귤응애에 대한 3종 이리응애의 포식량 비교

  • 김동환 (제주농업시험장 감귤시험장) ;
  • 김광식 (제주농업시험장 감귤시험장) ;
  • 현재욱 (제주농업시험장 감귤시험장) ;
  • 정순경 (제주농업시험장 감귤시험장)
  • Published : 2002.03.01

Abstract

Predation amount and density suppression ability of three species of phytoseiid mites (one native, Amblyseius womersleys Schica; two introduced species, Amblyseius fallacis Garman and Typhlodromus occidentalis Nesbit) on Panonychus citri McGregor were examined in laboratory condition (25$\pm$1$\^{C}$, RH 65$\pm$5%, 16L:8D). A. fallacis and T. occidentalis consumed 20.1 and 9.1 eggs of P. citri, respectively, whereas A. womersleyi consumed 1.1 eggs. When each larva, protonymph and deutonymph of P. citri were supplied as prey for 24 hours. A. womersleyi consumed 23.8, 16.5 and 9.0, and A. fallacis consumed 26.1, 18.2 and 7.4, respectively. However, T. occidentalis consumed only 7.8, 4.2 and 4.2. respectively Density suppression ability of A. womersleyi and A. fallacis against P. citri was very high at the release ratios of 20 : 1 (prey : predator). However, T. occidentalis did not regulate P. citri population effectively Developmental periods from egg to adult of A. womersleyi and A. fallacis was 6.1 and 5.9 days at 25$\^{C}$, respectively.

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