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찰옥수수 포장에서 1세대 조명나방(Ostrinia furnacalis) 방제를 위한 살충제 처리 시기

Application Timings of Insecticides to Control the First Generation of the Asian Corn Borer, Ostrinia furnacalis in Waxy Maize Fields

  • 정진교 (국립식량과학원 재배환경과) ;
  • 서보윤 (국립농업과학원 작물보호과) ;
  • 정인홍 (국립농업과학원 작물보호과) ;
  • 김은영 (국립식량과학원 재배환경과) ;
  • 이시우 (국립한국농수산대학 산학협력단)
  • Jung, Jin Kyo (Crop Cultivation and Environment Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Seo, Bo Yoon (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Jeong, In-Hong (Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Eun Young (Crop Cultivation and Environment Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Si Woo (R&DB Foundation, Korea National College of Agriculture and Fisheries)
  • 투고 : 2021.09.20
  • 심사 : 2021.11.22
  • 발행 : 2021.12.01

초록

찰옥수수 재배기간 중에 조명나방의 발육태별 밀도 변화와 옥수수의 피해 양상, 유기합성살충제 처리 효과 조사를 통해 1세대 조명나방 유충에 대한 적절한 방제시기를 결정하였다. 수원 지방에서 2016년 4월 20일에 일미찰 옥수수를 파종하고 7월 26일(옥수수 호숙기)에 수확하였다. 성페로몬트랩 조사에서 1화기(월동세대) 성충은 5월 29일 최대발생 피크를, 5월 31일에 50% 누적 발생을 보였다. 1세대 조명나방 유충의 대부분은 찰옥수수 생식생장기 초기인 7월 초까지 발육하였다. 1세대 조명나방 유충은 먼저 말린 잎 안에서 가해하고 이후 수술과 줄기로 이동하여 가해하고, 마지막으로 줄기와 이삭으로 이동하여 가해하였다. 시기별로 살충제를 처리한 후 피해 억제 효과를 검정한 결과, 찰옥수수 9~11엽기(late whorl stage)(6월 10~17일)가 에토펜프록스 유제의 유효한 처리시기였고, 6~7엽기(mid-whorl stage)(6월 3일)가 카보퓨란 입제의 유효한 처리시기였다. 이 시기들은 두 살충제에 대해 성충 최대포획일 12~19일 후와 5일 후였고, 50% 누적발생일 기준으로는 2일씩 앞당겨졌다.

We decided the efficient application timings of organo-synthetic insecticides for controlling the first generation larvae of O. furnacalis through investigations of insect stage-specific densities, damage aspects in maize, and effects of insecticides. A waxy maize cultivar, Ilmichal, was cultivated from April 20 (sowing) to July 26 (harvest, dough stage of maize) in Suwon, 2016. The maximum and 50% cumulative catch dates of the overwintering generation adults in the sex pheromone trapping were May 29 and May 31, respectively. Most of the first generation larvae finished their occurrence till the early reproductive stage of maize. The first generation larvae fed on leaves inside the whorl leaves before tassel and stem development of maize, sequentially moved to tassel and stem, and then moved finally to stem and ear parts. In the results of insecticide applications at different dates, the 9-11 leaf stage (June 10~17) and the 6-7 leaf stage (June 3) of maize were the most efficient application timings for direct spray of Etofenprox EC to maize, and for application of Carbofuran granules onto soil surface, respectively, which resulted in suppression of tunnelling damages. The timings for the two insecticides were 12-19 days and 5 days after the adult maximum catch date, respectively. Those timings after the 50% cumulative adult catch date were advanced 2 days.

키워드

과제정보

본 연구는 농촌진흥청 어젠다 연구과제(PJ01182401)를 수행하는 과정에서 얻은 결과를 바탕으로 작성되었다.

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