Biology of Torymus geranii (Walker), a Parasitoid of Chestnut Gall Wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera, Cynipidae)

밤나무혹벌(Dryocosmus kuriphilus)의 기생천적 남색긴꼬리좀벌(Torymus geranii)에 관한 생물학

  • Kim, Chul-Su (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Park, Il-Kwon (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Kim, Jong-Kuk (Department of Forest Resources Protection, Kangwon National University) ;
  • Shin, Sang-Chul (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Chung, Yeong-Jin (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute) ;
  • Choi, Kwang-Sik (Division of Forest Diseases and Insect Pests, Korea Forest Research Institute)
  • 김철수 (국립산림과학원 산림병해충과) ;
  • 박일권 (국립산림과학원 산림병해충과) ;
  • 김종국 (강원대학교 산림자원학부) ;
  • 신상철 (국립산림과학원 산림병해충과) ;
  • 정영진 (국립산림과학원 산림병해충과) ;
  • 최광식 (국립산림과학원 산림병해충과)
  • Published : 2005.09.01

Abstract

Torymus geranii was found to be a ectoparasitoid attacking the larvae of Dryocosmus kuriphilus. T. geranii has longevity of a $42.8{\pm}9.8$ days at $20^{\circ}C$ and $26.5{\pm}11.0$ day at $25^{\circ}C$ under conditions supplied with 100% honeydew. Oviposition numbers at 20 and $25^{\circ}C$ were $22.3{\pm}12.5$ and $42.2{\pm}18.4$, respectively. The eggs were oval in shape, measuring $0.56{\pm}0.33$ mm in length. The larvae, $2.94{\pm}0.18mm$ in length, was white and length of male and female pupae were $2.01{\pm}0.18mm$ and $2.73{\pm}0.09mm$, respectively. T. geranii had two generations with overwintering generation emerged on late May to early June at Chunchon, central part of Korea, however showed three generations with overwintering generation emerged on middle May to early June, the first one on late June to early July, and the second one on late July to earlyl August.

남색긴꼬리좀벌은 밤나무혹벌의 유충을 공격하는 외부기생성 천적으로 판명되었다. 남색긴꼬리좀벌의 수명은 꿀 원액을 공급한 경우 $20^{\circ}C$에서의 암컷성충 $42.8{\pm}9.8$일이었으며 아무것도 공급하지 않은 경우 $3.3{\pm}0.8$일이었다. 산란수는 $20^{\circ}C$에서 $22.3{\pm}12.5$개체, $25^{\circ}C$에서 $42.2{\pm}18.4$개체이었으며 산란초기에 다수 산란하는 경향을 보였다. 알은 장타원형으로 백색이며, 길이는 $0.56{\pm}0.33mm$ 이었고, 충방(gall chamber)당 1개의 알을 산란하나 중복하여 산란하는 경우도 관찰되었다. 유충은 백색이며 길이는 $2.94{\pm}0.18mm$이었고, 암컷 용의 길이는 $2.73{\pm}0.09mm$, 숫컷 용의 길이는 $2.01{\pm}0.18mm$로 암컷이 수컷에 비하여 컸다. 강원도 춘천지역에서는 년 2세대 발생했으며, 월동세대 성충발생기간은 5월 하순-6월 상순이었고 제1세대 성충발생기간은 6월 하순-7월 상순이었다. 경상남도 하동지역에서는 년 3세대 발생했으며, 월동세대 성충발생기간은 5월 중순-6월 상순, 제 1세대는 6월 하순-7월 상순, 제 2세대는 7월 하순-8월 상순이었다.

Keywords

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