مقایسه کارایی قارچ‌کش‌های مسی در کنترل بیماری پیچیدگی برگ هلو

Peach leaf curl disease caused by Taphrina deformans is one of the most important diseases of peach which causes quantitative and qualitative damage to crop in many parts of Iran every year. In the present study, the efficacy of two new fungicides, Badge®WG280 and Barzidox®WP85% was evaluated in controlling peach leaf curl disease. The experiment was carried out in Golestan, Semnan and North Khorasan in a Randomized Complete Block Design with 10 treatments and 4 replications. Treatments included 0.75, 1, 1.2 ml/L-1 of Badge®WG280 (copper hydroxid+copper oxychloride), 2,4,6 g/L-1 of Barzidox®WP85% (copperoxychloride), 2.5 ml/L-1 of Nordox®WG75% (copperoxide), 3 g/L-1 of Captan and controls (with and without water spraying). Treatments were applied at tree stages (the first, in autumn after falling leaves, the second, at the end of March before bud swelling and the third time, after the petals fall). Disease incidence percentage and disease severity percentage were measured. Mean comparison of disease severity and disease incidence percentages were done by Duncan's multiple range. Results showed that, the best efficacy of 6g/L-1 of Barzidox® in reducing the severity of the disease compared to the control was 81% and 80% respectively in Golestan and Semnan provinces. Also, it was 78% and 77% for 4 gL-1of this fungicide, respectively. The best performance of 1.2 ml L-1 of Badge, was 91 and 75%, in North Khorasan and Semnan provinces, respectively. Also, the best performance of two indicator fungicides, Nordox® and Captan, respectively, were 73% and 72% in Golestan province and 67% and 68%, in Semnan province. Therefore, according to the obtained results, it is concluded that 1.2ml/L-1 of Badge® and 4g/L-1 of Barzidox® have the best efficiency in controlling the peach leaf curl disease with three times of spraying (the first, in autumn after falling leaves, the second, at the end of March before bud swelling and the third time, after the petals fall).