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Effect of Inoculum Density and Temperature on Clover Cyst Nematode, Heterodera trifolii

온도와 접종밀도가 클로버씨스트선충의 증식에 미치는 영향

  • Jeong, Mungi (Department of Ecological Science, Kyungpook National University) ;
  • Lee, Dong Woon (Department of Ecological Science, Kyungpook National University)
  • Received : 2019.01.28
  • Accepted : 2019.02.18
  • Published : 2019.03.01

Abstract

Clover cyst nematode, Heterodera trifolii are one of the major pests that damage Chinese cabbage in high land cultivation area and have recently been distributed in Korea. This study was conducted to investigate the effect of temperature and inoculation density on the proliferation of clover cyst nematode. The clover cyst nematode was proliferated at $15-30^{\circ}C$ and the egg, female adult and cyst number was the highest at $20^{\circ}C$. As the inoculation density increased, the number of female cyst nematodes increased with the inoculation density and when 16 eggs were inoculated per gram of soil, the amount of growth, number of egg and cyst was the highest. Number of females and eggs were formed more in cabbage than in kale regardless of inoculation density. Chinese cabbage was a favorable host for clover cyst nematode growth than kale.

클로버씨스트선충(Heterodera trifolii)은 우리나라 고랭지에서 배추에 피해를 주는 주요 씨스트선충으로 최근에 분포가 확인되었다. 본 연구는 온도와 접종밀도에 따른 클로버씨스트선충의 증식에 미치는 영향을 알아보기 위하여 수행하였다. $15{\sim}30^{\circ}C$ 온도조건에서 클로버씨스트선충이 증식되었으며 $20^{\circ}C$에서 암컷 성충 수, 알 수, 씨스트 수 모두 가장 많았다. 접종밀도에 따른 클로버씨스트선충의 증식은 접종밀도가 높아질수록 암컷 씨스트선충의 수가 증가하는 경향이었는데 토양 1 g당 16개의 알 처리 시 증식량, 알 수, 씨스트 수 모두 가장 많았다. 암컷 씨스트 수와 알 수는 접종밀도에 상관없이 배추가 케일에 비하여 많이 형성되어 배추가 케일보다 클로버씨스트선충의 증식에 유리한 기주였다.

Keywords

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Fig. 1. Mean weight of shoot depending on temperature between with or without H. trifolii in pot.

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Fig. 2. Mean weight of shoot of Chinese cabbage and kale depending on different H. trifolii inoculation density in pot.

Table 1. Effect of temperature on the reproduction of Heterodera trifolii on kale

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Table 2. Effect of inoculation density on the reproduction of Heterodera trifolii on cabbage and kale

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