Changes of inoculum of pathogens for sugar beet in tare soils after different storages in lysimeters and stacks
2000
Schaeufele, W.R. | Buettner, G. (Institut fuer Zuckerruebenforschung, Goettingen (Germany))
In a pluriannual study (1993 - 1998) tare soils of different origins were stored under equal conditions in lysimeters and stacks. The tare soils were sampled repeatedly and the potential of Heterodera schachtii, of soil-borne fungal root rot pathogens of beet, of beet necrotic yellow vein virus and others was determined. While a contamination of Heterodera schachtii could not longer be traced in the soils after an one-year period, the root rot inducing fungi appeared sporadically in a biotest (BW-test) till the end of the observation period. The rhizomania virus was found also in the roots of young bait plants till the end of the trial; but the level of salt concentration in soil water seemed to influence the activity of the vector fungus Polymyxa betae.
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