Evaluation the Efficacy of cyflufenamid + triflumizole (Pancho® TF WG 18.4%) Fungicide in Controlling of Peach Powdery Mildew Disease

The purpose of this study was to evaluate the efficacy of Cyflufenamid 3.4% + Triflumizole 15% Pancho® TF (WG 18.4%) fungicide in controlling of peach powdery mildew. The field trials were undertaken on Esfahan, Markazi and Kohkiloyeh va Boyerahmad provinces. Three commercial orchards of susceptible cultivar (Alberta) which had a background of contamination to the disease in previous years and the trees were almost at the same age, base and growing conditions, were selected. The experiment was carried out in a randomized completely block design pattern with six treatments and four replicates. The fungicides included: Pancho® TF (WG 18.4%), 0.5/1000, 0.75/1000, 1/1000, Kresoxim-methyl 100g/l + Boscalid 200g/l (Collis® SC 30%), 0.5/1000 and control with water spraying and control with no spraying. Fungicides were used at swelling flower buds stage, the end of flowering time and three weeks later. The sampling was carried out of leaves and fruits, three weeks after the end of spraying the parameters of severity disease percent and incidence disease percent were assessed based on available scales considered and the data were analyzed using SAS software. The results showed that there was significant difference between treatments (fungicides) and controls at 1% probability level.  Mean comparison of the treatments with Duncan Multiple Test at 5% probability level showed that, all fungicides caused a significant decrease in the severity and incidence of disease infection percent compared to controls. The results of data analysis in three regions showed that Pancho® TF, 0.75/1000 with 69%, 67% and 71% on leaves disease severity and with 69%, 58% and 74% effect on leaves disease incidence in Esfahan, Markazi and Kohkiloyeh va Boyerahmad provinces respectively, had the best effect in controlling peach powdery mildew. Beside, Pancho® TF 0.75/1000 with 67% and 78% effect on fruits disease severity, 74% and 76% on fruits disease incidence had the best effect in Markazi and Kohkiloyeh va Boyerahmad provinces respectively. So Pancho® TF, 0.75/1000 is recommended to be used in peach powdery mildew management.