우리나라 더덕의 주 재배지인 전라남북도, 경상북도, 경기도, 강원도, 제주도, 울릉도 등 15지역 116개 재배포장을 대상으로 한 식물기생선충의 분포와 피해를 조사하였다. 분포가 확인된 9속의 선충 중 Ditylenchus citri, Meloidogyne hapla, M. incognita, Pratylenchus neglectus, Tylenchorynchus claytoni 등 5종이 동정되었다. 이들 중 M. hapla의 포장검출률이 61.9%로 가장 높았고, Tylenchu spp. 16.1%, Pratylenchus neglecrus 7.8%, Ditylenchus citri 5.1%, Helicotylenchus sp. 5.1%순이었다. 더덕 2년생을 대상으로 한 지역별 당근뿌리혹선충에 의한 피해는 포장감염률과 감염주율이 각각 67.0%, 60.2%였으며 평균 감수율은 10%였다. 전북지역 더덕 재배지에서 당근뿌리혹선충에 의한 피해는 재배년수가 길어질수록 많았고, 평야지가 산간지나 중산간지보다 많은 경향이었다.
This study was conducted to survey plant-parasitic nematodes and their damages on Codonopsis lanceolata Trautv at 116 fields of 15 major cultivation areas in Korea. Among the 9 plant-parasitic nematode genera detected in the fields, Ditylenchus citri, Meloidogyne hapla, M. incognita, Pratylenchus neglectus, Tylenchorynchus clayton were identified. M. hapla Chitwood showing the highest field infection rate of 61.9% followed by Tylenchus spp. 16.1%, Pratylenchus neglectus 7.8%, Ditylenchus citri 5.1%, and Helicotylenchus sp. 5.1%. Average field infection rate of root-knot nematodes in 2-year-old C. lanceolata was 67.0%, and the average plant infection rate was 60.2%. The average yield decrease rate was 10%. The damage rate by the root-hot nematode increased as the cultivation year extended in Jeonbuk province, and the damage was also higher in flat land than in mountainous areas.
