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Leaf Damage Symptom of Grape (Vitis vinifera) by Tea Bagworm (Eumeta minuscula) and Control Efficacies of Several Insecticides against the Eumeta minuscula

차주머니나방(Eumeta minuscula)에 의한 포도 잎 피해증상 및 몇 가지 약제의 차주머니방에 대한 방제효과

  • Song, Jin Sun (Horticultural & Herbal Crop Environment Division, National Horticulture of Horticultural & Herbal Science) ;
  • Lee, Chae Min (Department of Ecological Science, College of Ecology and Environment Sciences, Kyungpook National University) ;
  • Lee, Dong Woon (Department of Ecological Science, College of Ecology and Environment Sciences, Kyungpook National University)
  • 송진선 (원예특작과학원 원예특작환경과) ;
  • 이채민 (경북대학교 생태환경대학 생태과학과) ;
  • 이동운 (경북대학교 생태환경대학 생태과학과)
  • Received : 2012.11.15
  • Accepted : 2013.01.18
  • Published : 2013.03.31

Abstract

Damage of tea bagworms, Eumeta minuscula was observed for the first time from grape leaves of grape (varieties: Cambell Early and M.B.A.) from a vinery at Gumho-up, Gyeongsan, Gyeongbuk on 31 August, 2012. Activity of insecticides [Bacillus thuringiensis var. kurstaki (serotype IIIa, IIIb) WP, chlorantraniliprole 5% GP, methoxyfenozide 21% SC, spinetoram 5% GP, and spinosad 10% GP] was tested on fourth instar larvae of Eumeta minuscula in laboratory. Mortality of 4th instar of Eumeta minuscula was higher when treated with spinosad 10% WG (88.7%) and spinetoram 5% WG (67.7%) sprayed with field recommended concentration using a home sprayer in laboratory. Mortality decreased as the concentration decreased, however leaf damage rate was significantly different between the one-fourth rate and the control. Spinetoram 5% WG and spinosad 10% WG showed 63.7 and 55.7% respectively mortality of fourth instar Eumeta minuscula in field. Though these two insecticides could be used for the control of bagworms on grape, a more effective insecticide needs to be found.

차주머니나방에 의한 포도 잎 피해증상을 2012년 8월 31일 경북 영천시 금호읍에서 국내 최초로 확인하였다. 실내에서 5종 약제[Bacillus thuringiensis var. kurstaki (serotype IIIa, IIIb) WP, chlorantraniliprole 5% GP, methoxyfenozide 21% SC, spinetoram 5% GP, spinosad 10% GP]를 추천농도로 포도 잎 분무처리에 의한 차주머니나방 4령충의 살충율은 spinosad 10% WG와 spinetoram 5% WG에서 각각 65% 및 70%로 높았다. 추천농도 이하에서는 치사율이 감소하였고, 엽 피해면적율은 추천농도의 1/4배 처리에서도 무처리에 비하여 낮았다. 4령 유충에 대해 직접살포법으로 야외에서 효과조사를 한 결과는 spinetoram 5% WG와 spinosad 10% WG 처리의 보정사충율이 각각 63.7, 55.7%였다. 따라서 포도 차주머니나방 방제를 위해 spinetoram과 spinosad의 활용가능성을 나타내었으나, 보다 효과적인 약제선발이 요구되는 바이다.

Keywords

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