Istotnym problemem współczesnego rolnictwa jest obniżenie efektywności dostępnych na rynku środków ochrony roślin. Przyczyną spadku lub nawet całkowitej utraty skuteczności fungicydów jest często wzrost odporności na ich substancje czynne u zwalczanych pa­togenów. Odporność na substancje czynne środków grzybobójczych jest cechą naturalnie występującą w populacjach grzybów. Jednak działania człowieka powodują nasilenie rozwoju tego zjawiska. W artykule przedstawiono sposoby działania substancji czynnych fungicy­dów najpowszechniej stosowanych w Polsce do ochrony upraw: triazoli, morfolin, inhibitorów dehydrogenazy kwasu bursztynowego oraz strobiluryn. Opisano także mechanizmy nabywania odporności przez grzyby na te substancje.

A significant problem of modern agriculture is the reduction in the effectiveness of plant protection products available on the market. The reason for the decrease or even complete loss of effectiveness of fungicides is often the increase in resistance to their active sub­stances among the pathogens being fought. Resistance to the active substances of preparations is a feature that naturally occurs in fungal populations. However, human activities cause the development of this phenomenon to intensify. The article presents the modeses of action of the active substances of the fungicides most commonly used in Poland to protect crops: triazoles, morpholines, succinic acid de­hydrogenase inhibitors and strobilurins. The mechanisms of acquiring resistance by fungi to these substances have also been described.

triazole; morfoliny; strobiluryny; SDHI; odporność grzybów; DMI; morpholines; QoI; SDHI; fungus resistance

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