Trials were carried out with difenoconazole for the control of Alternaria/Cercospora leaf spots in carrots and early blight (Alternaria solani) in potatoes and tomatoes.Difenoconazole at 75-125 g/ha gave better control of fungal leaf spots in carrots than the standard protectant mancozeb.Early blight in potatoes and tomatoes was controlled by difenoconazole at 75-250 g/ha applied at a 7-14 day spray interval.This was comparable to, or better than, the standard mancozeb.A 125 g/ha rate of difenoconazole applied at 21 day intervals in carrots and 14 day intervals in potatoes gave optimum control of these diseases.