Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Seasonal Occurrence of Japanese Gall-forming Thrips, Ponticulothrips diospyrosi Haga et Okajima, and Its Damage Pattern

감관총채벌레(Ponticulothrips diospyrosj)의 발생소장과 피해 양상

  • 신원우 (국립식물검역소) ;
  • 이흥수 (경남농업기술) ;
  • 이규철 (경상대학교 농업생명과학대학, 농업생명과학연구) ;
  • 박정규 (경상대학교 농업생명과학대학, 농업생명과학연구원)
  • Published : 2004.06.01
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Abstract

Seasonal occurrence of Japanese gall-forming thrips, Ponticulothrips diospyrosi Haga et Okajima, and its damage pattern on leaves and fruits were studied at sweet persimmon orchards in Gimhae (orchard A, B) and Changwon, Gyeongnam. Korea in 2002 and 2003. Monitoring adults by yellow sticky traps and inspecting each developmental stage in damaged rolled-leaves revealed that the overwintered adults moved to sweet persimmon orchard from late April to late May, and oviposited inside the rolled leaves. Adults developed from the eggs showed peak occurrence of the first generation adults in early to mid June. Inspection of rolled leaves indicated that the peak occurrences of eggs, nymphs, and pupae of the first generation took place in early to mid May, late May to early June, and early June, respectively. Each developmental stage showed the second small peaks in the late season. Results suggest that most thrips live a single generation per year, but a small portion may develop to the second generation in persimmon orchards. The percent of damaged leaves was highest in Changwon orchard at 9.7％ in early June. Percentage of damaged fruits increased from 0.84％ in early June to 30.2％ in early September in Gimhae B orchard. It was found that the closer the persimmon trees were to the edge of the orchard, the worse damaged the leaves were. Appropriate timing for incorporation of control measures were discussed in relation to the seasonal occurrence of adults.

경남 김해와 창원의 단감원에서 감관총채별레(Ponticulothrips diospyrosi Haga et Okajima)의 발생생태와 피해양상을 조사하였다. 황색끈끈이 트랩 조사(2002년)와 피해권엽 내부 정밀조사(2002,2003년)에 의하면 월동세대 성충은 4월 하순부터 5월 하순 사이에 월동처에서 단감원으로 이동하여 단감의 새 잎에 산란하며, 제 1세대 성충의 발생 최성기는 6월 상중순이었다. 피해권엽 정밀조사에 의한 제1세대 난, 약충, 번데기의 발생 최성기는 각각 5월 상중순, 5월 하순6월 상순, 6월 상순이었다. 대부분의 제1세대 성충은 우화후 월동처로 이동하지만 일부 성충이 산란한 개체가 발육하여 제2세대 성충이 되는데, 7월 하순 이후에 발생하는 성충이 제2세대 성충인 것으로 생각된다. 피해엽율은 시기가 경과할수록 증가하였으며 창원포장에서 6월 상순에 9.7%로 가장 높았다. 피해과율은 6월 중순 낙화 이후부터 관찰되었으며 김해 B포장에서 9월 상순의 피해과율이 30.2%로 가장 높았다. 과수원의 가장자리에 가까이 위치한 나무일수록 피해엽 발생시기가 빨랐으며, 특히 소나무 군락을 중심으로 l0m이내에 피해가 심하였다. 성충의 발생시기와 관련하여 방제시기 문제를 고찰하였다.

Keywords

References

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