Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Comparative Responses of Sugar Beet Cyst Nematode, Heterodera schachtii and Clover Cyst Nematode, H. trifolii to Different Nematicides

클로버씨스트선충과 사탕무씨스트선충 알과 유충에 대한 약제 반응 비교

  • Jeong, Mungi (Department of Ecological Science, Kyungpook National University) ;
  • Lee, Dong Woon (Department of Ecological Science, Kyungpook National University)
  • Received : 2020.08.11
  • Accepted : 2020.11.03
  • Published : 2020.12.01
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Abstract

This study aimed to investigate the differences in the effects of nematicidal materials (Burkholderia rinojensis, fluazaindolizine, fluopyram, fosthiazate, hydrogen peroxide, and imicyafos) on eggs and larvae of the sugar beet cyst nematode, Heterodera schachtii and clover cyst nematode, H. trifolii, which have recently become problematic in highland Chinese cabbage cultivation areas in Korea. Comparison of the hatching rates according to the test materials showed differences between treatments. In the treatment with fluopyram, fosthiazate, and imicyafos, a very high hatching inhibitory effect of 99% was observed in both nematodes, and there was no difference in the efficacy of treatments between nematode species except for that with hydrogen peroxide. Regarding the nematocidal activity of treatments against hatched larvae, only the fluazaindolizine treatment, despite showing a high hatching inhibitory effect, showed a low nematicidal effect of less than 30% against both nematodes, whereas a mortality rate of more than 90% was observed in the other treatments. There was no difference between nematode species in the reactions of the 2nd instar juveniles to all nematicidal test materials after 24 and 48 h of treatment. Although there are limitations to the laboratory experiment, the reaction to the nematicidal materials of the two cyst nematodes that damage the same host was similar, and simultaneous control is suggested in the areas where the two nematodes occur together.

본 연구는 우리나라 고랭지 배추재배지에서 근래에 문제되고 있는 Heterodera속의 사탕무씨스트선충(H. schachtii)과 클로버씨스트선충(H. trifolii)에 대한 살선충 물질(Burkholderia rinojensis, fluazaindolizine, fluopyram, fosthiazate, hydrogen peroxide, imicyafos)들의 알과 유충에 대한 약제 반응 차이를 알아보기 위하여 수행하였다. 실험 물질에 따른 부화율 비교 결과 부화율은 처리 약제별에 따라 차이를 보였는데 fluopyram, fosthiazate, imicyafos 처리에서는 두 선충 모두 99%의 매우 높은 부화억제 효과를 보였으며 선충간 약효차이는 hydrogen peroxide를 제외하고는 없었다. 부화유충에 대한 처리별 살선충 활성은 부화 억제효과 실험에서 높은 부화억제 효과를 보였던 fluazaindolizine 처리에서만 두 선충 모두에 대하여 30%미만의 낮은 살선충 효과를 보였고, 나머지 처리에서는 90%이상의 치사율을 보였다. 처리 24시간 후와 48시간 후 모든 실험물질에 대한 2령충들의 약제반응은 종간 차이를 보이지 않았다. 실내 실험에서 동일한 기주를 가해하는 두 씨스트선충들의 살선충제들에 대한 약제 반응이 동일하게 나타나 두 선충 혼생지에서 동시방제가 가능할 것으로 판단된다.

Keywords

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