Influence of crop rotation and fungicides on occurrence limitation of winter oilseed rape diseasesWpływ zmianowania i fungicydów na ograniczanie występowania chorób rzepaku ozimego

Abstract

Summary The aim of this study was to determine the effect of crop rotation on the occurrence limitation of major fungal diseases of oilseed rape depending on the used fungicides. The experiment was carried out in the Field Experimental Station in Winna Gora on the two cultivars of oilseed rape. The experiment was established on a field with oilseed rape cultivation three years before the experiment, and on the field with oilseed rape cultivated in monoculture. The occurrence of diseases depends on the crop rotation, timing of application of fungicides and season. Higher level of diseases was reported on plants cultivated in monoculture. Oilseed rape seeds originated from monoculture were significantly more infected by fungi. The examined oilseed rape cultivars were similarly susceptible to infection by pathogens. Both, appropriate crop rotation, and chemical crop protection result in reducing of the occurrence of diseases and allow to obtain a higher yield. However, this relationship may be modified by the weather conditions.