Ochrona warzyw kapustowatych przed chorobami w zrównoważonym systemie produkcji

The aim of this work was to study the effect of new chemical products: azoxystrobin, pyraclostrobin/boksalid, trifloxystrobin, iprodione and natural products: extract with grapefruit, oil of tea tree and extract with a lot of species herbs to control black cross (Alternaria spp.), gray mold (Botrytis cinerea) and clubroot (Plasmodiophora brassicae) on cruciferous crops in Poland. The most effective products against black cross were fungicidies with strobilurin group and containing cyprodinil/fludioksonil or alternately applications naturals products. The best control of clubroot in microplots trials gave natural product.