The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Control Efficacy of Ethofenprox against Soybean Pod Gall Midge, Asphondylia yushimai (Diptera: Cecidomyiidae) at Different Spray Time

Ethofenprox 처리시기별 콩꼬투리혹파리의 방제효과

  • Received : 2014.04.28
  • Accepted : 2014.09.05
  • Published : 2014.09.30
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Abstract

Occurrence of soybean pod gall midge (SPGM), Asphondylia yushimai, and soybean pod damage caused by SPGM, and its control efficacy treated with ethofenprox 20EC were first observed at Miryang from 2006 to 2008 in Korea. The typical damage symptoms in soybean pod caused by SPGM were brownish coloration and malformation. By beating method occurrence of SPGM was observed from beginning bloom of soybean and its collected population increased with season until middle September. Soybean pod damage caused by SPGM was heaviest at seeding date of 10th May, followed by 11th June and 26th May. Control efficacy against SPGM sprayed with one time application of ethofenprox 20EC at different spray time in soybean reproductive stage was highest with 92.9% at R2.5, followed by 87.9% at R2 and 83.6% at R3, and was low from about 19 to 66% at other spray time. Accordingly, the most effective spray time of insecticide for control of SPGM in soybean field was found to be R2.5 which is between R2 and R3.

국내 최초로 밀양에서 콩꼬투리혹파리의 발생시기, 콩꼬투리 피해율 및 ethofenprox 20EC의 방제효과를 조사하였다. 콩꼬투리혹파리에 의한 콩꼬투리의 전형적인 피해증상은 피해부위의 갈변 및 기형화로 나타난다. 콩 포장에서 타락법에 의해 조사된 콩꼬투리혹파리 성충은 콩의 개화시기인 7월 5일부터 발생하여 9월 중순까지 그 밀도가 증가하였다. 파종기에 따른 콩꼬투리혹파리에 의한 콩꼬투리의 피해협률은 5월 10일 파종에서 가장 심하였으며, 다음은 6월 11일 및 5월 26일 파종 순 이었다. 콩 생식생장기에 ethofenprox 20EC 1회 살포에 따른 콩꼬투리혹파리의 방제효과는 R2.5에서 92.9%로 가장 높았으며, 다음은 R2에서 87.9%, R3에서 83.6%이었으며, 나머지 처리시기에서는 약 19~66%로 낮았다. 따라서 콩에서 콩꼬투리혹파리의 효과적인 약제방제 시기는 개화성기와 착협시 사이인 R2.5로 여겨진다.

Keywords

References

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