The aim of this work was to study the effect of new, conventional and natural products using preharvest treatments of head and chinese cabbage and their influence on control of postharvest diseases (grey mould and bacterial rot) in long-term storage. The most effective products against grey mould of head cabbage during long-term storage were: Signum 33 WG (0.75 kg/ha), Teldor 500 SC (1.5 l/ha), Amistar 250 SC (0.8 l/ha). Their effectiveness was similar to the reference product Amistar 250 SC (0.8 l/ha). The most protective control of bacterial rot and grey mould during long-term storage of chinese cabbage was obtained after treatment with Signum 33 WG (0.75–1.0 kg/ha) and Amistar Opti 480 SC (2.1 l/ha). High efficiency was obtained also after applying natural products: Timorex (7.5 l/ha), BM 608 (5.6 l/ha) and Prev-AM 060 SL (3.0 l/ha).
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