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Effects of Orchard Environments and Landscape Features on the Population Occurrence of Major Lepidopteran Pests in Apple Orchards

과원 환경과 경관 요소가 사과원 주요 나방류 해충 발생에 미치는 영향

  • Kim, Hyangmi (Department of Plant Medicals, Andong National University) ;
  • Jung, Chuleui (Department of Plant Medicals, Andong National University)
  • 김향미 (안동대학교 식물의학과) ;
  • 정철의 (안동대학교 식물의학과)
  • Received : 2021.02.16
  • Accepted : 2021.02.22
  • Published : 2021.03.01

Abstract

Landscape composition and structure are important factors determining biological diversity including pests and natural enemires in agricultural ecosystem. This study was conducted to indentify effect of landscape composition on occurrence of lepidopteran pest population in Geochang, Gyoungdnam. For this, orchard characteristics and management practices were surveyed in 80 conventional apple orchards in Geochang, Korea, along with the monitoring of pest population densities. The landscape features of each surveyed orchard also obtained by extracting information from the public-service map. Grapholita molesta was the most dominat and damaging pest followed by Phyllonorycter ringoniella and Carposina sasakii in trap catches. Adoxophyes paraorana occurrences were low. Farmers spray insecticides and fungicides ap. 12.4 times per year respectively while acaricides were sprayed 2.4 times. Major landscape features such as surrounding apple orchard or paddy field did not influence the pest populations but presence of plum, peach, wild peach, graph, and even abandoned orchards significantly resulted in higher pest population mostly on G. molesta. C. sasakii population was higher in orchards with grape, peach, and P. ringoniella with peach, grape, abandoned orchards and jujube. Results highlight the need of landscape management not only for the rural amenity but also for increasing functional diversity of agroecosystem as well as reducing pest population.

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