Res. Plant Dis > Volume 25(3); 2019 > Article
Research in Plant Disease 2019;25(3):124-130.
DOI: https://doi.org/10.5423/RPD.2019.25.3.124    Published online September 30, 2019.
마 재배지의 뿌리혹선충의 발생 실태 및 수직 분포
권기윤1 · 강헌일1 · 서종민1 · 윤을수2 · 박남숙2 · 최인수1,2*
1부산대학교 생명자원과학대학 식물생명과학과
2부산대학교 생명자원과학대학 선충연구센터
 
Occurrence and Vertical Distribution of Meloidogyne incognita in Chinese Yam (Dioscorea batatas)
Giyoon Kwon1, Heonil Kang1, Jongmin Seo1, Eulsoo Yun2, Namsook Park2, Insoo Choi1,2
1Plant Bioscience, College of Natural Resources and Life Science, Pusan National University, Miryang 50463, Korea
2Nematode Research Center, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea
Correspondence:  Insoo Choi,*Tel: +82-55-350-5692
Fax: +82-55-350-5509
E-mail: ichoi@pusan.ac.kr
Received: August 08, 2019   Revised: August 27, 2019   Accepted: August 29, 2019
Abstract
The study was conducted to investigate the infestation and distribution of plant-parasitic nematodes on Chinese yam (Dioscorea batatas) in Andong, Korea. Root-knot nematodes, Meloidogyne incognita was the most prevalent nematode species which is found from 43 yam fields (81.1%) with high population densities (average of 450 juveniles/300 cm3). Other nematodes, root-lesion nematode (Pratylenchus spp.) and pin nematode (Paratylenchus spp.) were less problematic. Density of juveniles (J2) of M. incognita was 10 J2/300 cm3 by August, then increased to 274 in September and 624 in October. The highest J2 density was found at the soil depth between 40 and 50 cm (1,840 J2/300 cm3). M. incognita was able to infest yam tuber down to a depth of 70 cm and developed galls outside and brown spots inside. The highest number of females were found at 40–50 cm (79 females/10 cm piece) tuber from the top.
Key Words: Chinese yam, Dioscorea batatas, Meloidogyne incognita, root-knot nematodes, vertical distribution
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