QoI

[2] QoI are chemical compounds which act at the quinol outer binding site of the cytochrome bc1 complex.

QoI fungicides are used on a wide range of crops, such as cereals, vines, pome fruits, cucurbits, tomatoes, and potatoes.

[citation needed] They are also commonly used for vine culture, against Plasmopara viticola, responsible for downy mildew or in oïdium treatment.

[3] Some fungicide resistance has been observed in many crop pathogens[4] (such as in the case of wheat powdery mildew), so the application of QoI products should respect effective rates and intervals to provides time and space when the pathogen population is not influenced by the product selection pressure.

[clarification needed] [5] Resistance to group 11 is conferred by cytochrome b mutations G143A and F129L, and by other mechanisms.