Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Comparative Analysis to Damage Reduction of Host Plant by Applying a Mating Disruptor of the Oriental Fruit Moth, Grapholita molesta in Two Different Cultivation Environments of Apple Orchard

재배환경이 상이한 사과원에서 복숭아순나방(Grapholita molesta) 교미교란제 처리에 의한 기주 피해 억제 효과 비교

  • Published : 2008.03.30
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Abstract

This study demonstrates a variability in efficacy of mating disruption against the oriental fruit moth, Grapholita molesta, populations infesting apples cultivated in differential environmental conditions. Throughout the growing seasons, trap catches of G. molesta male moths and damaged leaf and fruit were examined to evaluate the efficacy of a commercialized mating disruptor. Treatment of the mating disruptor significantly reduced the trap catches of male moth in treated plot, compared to those of the untreated plot. This reduced trap catches were significantly correlated with leaf and fruit damage. Moreover, the highest host damage occurred in June just after the highest overwintering adult peaks in both plots. The treatment of mating disruptors in Chungsong effectively disrupted the overwintering population in April and May, resulting in no noticeable host damage during the following growing seasons. However, there was a marked difference in host damage between two plots, especially in late seasons. Variation in the efficacy of mating disruption technology in terms of host damage appeared to be related with nearby pheromone-untreated orchards, which may result in the immigration of gravid females.

본 연구는 재배환경이 상이한 두 사과원에서 사과 과실 및 신초에 피해를 주고 있는 복숭아순나방(Grapholita molesta)의 성페로몬을 이용한 교미교란기술의 효과를 검토하는 연구로 재배환경이 다른 지역간에 교미교란효과에 변이가 있을 수 있다는 것을 보여주었다. 효과 검토는 두 지역에서 각각 처리구와 무처리구를 설치하고 각각 시간 경과에 따른 복숭아순나방 성페로몬 트랩에 유인되는 수컷의 밀도와 복숭아순나방에 의한 기주작물 피해도 조사되어 분석되었다. 교미교란 기술은 복숭아순나방의 수컷 포획밀도를 무처리구에 비해 현격하게 낮추어 두 처리지역 모두에서 교미교란효과가 있었음을 나타났다. 이때 수컷 유인밀도는 기주 식물의 피해와 뚜렷한 상관관계를 이루어, 월동세대의 높은 성충발생피크는 바로 다음 세대(6월)의 높은 기주피해를 유발시켰다. 청송 포장의 경우 월동세대(4-5월 성충피크)의 교미교란제 처리 효과가 높았으며 이는 이어지는 복숭아순나방 발생 기간동안 기주 피해는 물론이고 차세대 성충 발생밀도를 낮추는 효과를 나타냈다. 그러나 생육 후기의 기주 피해분석에서 두 포장은 뚜렷한 교미교란 방제 효과 차이를 보였다. 교미교란 효과 차이는 이들 두 사과원의 인근 무방제지역의 분포 차이에 기인된 것으로 교미한 암컷의 유입 가능성을 제시하였다.

Keywords

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