국내 들깨 재배지 식물기생선충 감염현황
Incidence of plant-parasitic nematodes in perilla in Korea
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국내 들깨 재배지의 식물기생선충 감염현황을 조사하기 위해 2020년 1월 21일부터 10월 27일까지 8개 시군의 노지, 시설 들깨 재배지에서 채취한 토양 시료 51점을 분석하였다. 들깨 재배지에는 뿌리썩이선충류, 나선선충류, 뿌리혹선충, 위축 선충이 감염되어 있었으며, 뿌리썩이선충 (39%)과 나선선충 (55%)이 다른 선충에 비해 높은 감염률을 보였다. 들깨는 연작연수가 증가할수록 뿌리썩이선충의 발생 빈도는 증가하는 추세를 보였으며, 11년 이상 연작하면 5년 미만일 때보다 발생 빈도가 2배 이상 증가하였다. 잎들깨와 종실용 들깨 재배지에 감염된 선충 종류와 밀도는 차이를 보였다. 들깨 검출 선충 가운데 경제적으로 중요한 뿌리썩이선충의 분자생물학적 종 동정 결과, 2속 3종 (Pratylenchus penetrans, P. vulnus, Pratylenchoides leiocauda)의 뿌리썩이선충이 감염되어 있는 것으로 나타났다. 본 연구 결과에 따라, 들깨 밭의 선충 관리 전략 수립을 위해서는 뿌리썩이선충이 문제 선충이라는 점이 고려되어야 할 것이다.
Abstract
To investigate the incidence of plant-parasitic nematodes (PPNs) in perilla fields in Korea, 55 soil samples were collected from open fields and plastic-film house fields and were analyzed during January 2020 to October 2020. Root-lesion nematodes (RLNs), spiral nematodes, root-knot nematodes, and stunt nematodes were detected in perilla fields, and the incidences of RLNs (39%) and spiral nematodes (55%) were higher than those of other nematodes. Among PPNs, RLNs are very important species found on economic crops. The detection frequency of RLNs was increased due to continuous crop cultivation, and the frequency of fields that cultivated only one crop continuously for over 11 years was twice higher than the frequency of fields that cultivated only one crop for less than 5 years. The PPN species diversity and density were different between leaf-perilla cultivation fields and seed-perilla cultivation fields. In phylogenetic analysis of RLNs, Pratylenchus penetrans, P. vulnus, and Pratylenchoides leiocauda were identified in perilla fields. These results suggest the RLNs should be considered for establishing nematode management strategies in perilla fields in Korea.
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