The aim of this study was to evaluate the development of the peach rust in two seasons and, the efficiency of fungicides to control the peach rust and the shot-hole in orchards of the metropolitan region of Curitiba, Paraná, Brazil. The trials were carried out in a commercial orchard and were designed in complete randomized blocks, cv. Chimarrita, with four treatments (mancozeb, thiophanate methyl, chlorothalonil and control-unsprayed) and four replications, in the crop seasons 20004/5 and 2005/06. Each fungicide was sprayed eight times, at 15 to 20 days intervals. The assessment of the epidemic progress and effectiveness of fungicide were performed based on the incidence and severity on leaves and percentage of plants defoliation. The progress rate of the epidemic and the initial inoculum did not differ significantly between years and the logistic model fit to data of both years. All fungicides reduced the defoliation and severity of peach rust, but chlorothalonil was the best and also reduced the incidence in both years. The fungicides mancozeb and thiophanate methyl reduced the shot-hole incidence.
Prunus persica; Transzchelia discolor; Wilsonomyces carpophilus incidence; chemical control
