Untersuchungen zur Wirtseignung verschiedener geographischer Herkünfte von Ackerunkräutern gegenüber dem Rübenzystenälchen Heterodera schachtii Schmidt |
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| Authors: | W GLEIßL G BACHTHALER G M HOFFMANN† |
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| Institution: | Bayerische Landesanstalt für Bodenkultur und Pflanzenbau, Vöttinger Str. 38, D-8050 Freising;Lehrstuhl für Phytopathologie der Technischen Universität München, D-8050 Freising-Weihenstephan, Bundesrepublik Deutschland. |
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| Abstract: | Investigations on the suitability of weeds of various geographical origins as hosts of the sugar-beet nematode Heterodera schachtii Schmidt The suitability of five weed species of various geographical origins in Bavaria as host plants of Heterodera schachtii was tested. The root diffusates of all Capsella bursa-pastoris and Stellaria media origins examined increased hatching of larvae; Chenopodium album. Viola arvensis and Galium aparine did not have any effects. In biotests, cyst-forming was found regularly on the first-mentioned species, whereas only single ones were seen on the roots of Chenopodium album, in no case were new cysts found on those of Viola arvensis and Galium aparine. There were also no differences in influence on the population density. Hence, at least within a restricted geographical area, the suitability of weeds as hosts of Heterodera schachtii is species-specific. |
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