Spatial Distribution of Pasteuria nishizawae Attacking Heterodera glycines
1998
Kim Dong-Geun Songju Fruit Vegetable Experiment Station, Songju (Korea Republic) Lee Young-Kee National Institute of Agricultural Science and Technology, RDA, Suwon (Korea Republic)
Spatial distribution in soil and seasonal population changes of Pasteuria nishizawae first found in Korea from soybean cyst nematode were studied. P. nishizawae infested in 61% of areas in a soybean field; in an average, about 0.3% of 46 cysts and 17.6% of 9 juveniles per 100 g soil were infested with the bacterium. The highest percentages of spore-attached nematodes were found in July (75%) and between soil depth of 11~20 cm. The number of spores per juvenile was positively correlated with the percentage of juveniles with spores (r=0.4203; P0.0133),but negatively correlated with the number of juveniles in soil (r
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