Occutrrence of Root-knot Nematodes in Sweet Potato Fields and Resistance Screening of Sweet Potato Cultivars
2006
Choi, D.R. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Lee, J.K. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Park, B.Y. (National Institute of Crop Science, RDA, Suwon, Republic of Korea) | Chung, M.N. (Rural Development Administration, Suwon, Republic of Korea)
Total of 36 sweet potato field soils were sampled to survey the occurrence of the root-knot nematodes (RKN). The 61% of sweet potato fields in Haenam, 40% in Iksan and 31% in Yeju were infested with RKN, respectively. Average population density of RKN was 324 juveniles per 300 g soil. The resistance screening of sweet potato cultivars against RKN was carried out by using clay pots in a greenhouse. Average temperature under ground 10 cm in pot was 21.5℃ during the test. There was no difference in number of egg sacs among different inoculation methods, however the egg-inoculation method was easy for treatment and had stable far results.
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