Einfluss von ligninhaltigen Komposten und Pflanzgutgesundheit auf den Befall mit Rhizoctonia solani bei Kartoffeln

Summary

The effects of initial seed potato infection and suppressive composts made of mixtures
of organic household and yard waste on the R. solani severity in potatoes were tested
in field trials under organic conditions at the University Kassel in the years 2006-08
and at two sites in northern Germany in 2008. Composts directly applied in strips to
the seed tuber area at 5 t dry matter ha-1 significantly reduced both the infestation of
harvested potatoes with black scurf and the percentage of tubers with malformations
and dry core The rate of initial seed tubers infection and the site significantly affected
tuber health and quality.