Effect of certain adjutants on enhancing the biological activity of some fungicides to control potato late blight [electronic resource].

Includes references.

A number of selected fungicides, namely chlorothalonil,(Daconil 500 F), mancozeb (Dithane M 45), metalaxil (Ridomil 5 G), Fluazinam (Shirlan) and fentin hydoxide (Stanex 18 flow) were used to control late blight of potato caused by Phytophthora infestans in field trials.fungicides were applied at normal and half normal application rates either alone or mixed with adjuvants .The adjuvants (0.1%) mixed with fungicides were -AtpIus- 450, SCS 3338. SCS 3610 and 3878. The best fungicide-adjuvant combination for controlling late blight of potato were fentin hydroxide "Atplus" 450 followed by fluazinam-SCS 3976 and mancozeb-any of adjuvants.Clorothalonil was equally well enhanced by addition of either Atplus "450 or SCS 3338 adjuvant. Biochemical changes such as Chlorophyll content, total soluble sugars, total reduced sugars and phenolic compoundS, due to late blight of potato in treated plants were investigated. When adjuvants were used, a pronounced Improvement of the biological activity of reduced doses of tested fungicides was achieved in potato plants infected with Phytophthora infestans.

Summary in Arabic.

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