Comparing the Efficacy of Two Copper Fungicides in Controlling Peach Leaf Curl Disease

Subject Areas : Journal of Chemical Health Risks

Zohreh Jahani Hossein Abadi ¹ , Mahdi Mohammadi Moghadam ² , Hojjatollah Rabbani Nasab ³ , Hamid Namvar Hamzanlue ⁴ , Majid Aldaghi ⁵ , Hossein Khabbaz-Jolfaee ⁶

1 - Ph.D student in Plant Protection, Faculty of Agriculture, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 - Crop and Horticultural Sciences Research Department, Agricultural and Natural Resources Research and Education Center of Semnan, AREEO, Shahrood, Iran
3 - Department of Plant Protection, Agricultural and Natural Resources Research and Education Center of Golestan, AREEO, Gorgan, Iran
4 - Department of Plant Protection, Agricultural and Natural Resources Research and Education Center of North Khorasan, AREEO, Bojnord, Iran
5 - Department of Plant Protection, Agricultural and Natural Resources Research and Education Center of Khorasan-Razavi, AREEO, Mashhad, Iran
6 - Department of Plant Pathology, Iranian Research Institute of Plant Protection, AREEO, Tehran, Iran

Received: 2023-12-27 Accepted : 2024-04-06 Published : 2024-04-29

Keywords: Chemical control, Peach leaf curl, Disease incidence, Disease severity, Badge®,

Abstract :

Peach leaf curl disease, caused by Taphrina deformans (Berk.) Tul., is one of the most serious peach diseases, causing quantitative and qualitative damage to crops across Iran each year. In current study, the efficacy of two new fungicides, Badge®WG280 and Barzidox®WP85%, was evaluated in controlling peach leaf curl disease. The experiment was conducted in Golestan, Semnan and North Khorasan using a randomized complete block design with ten treatments and four replications. Treatments included 0.75, 1, and 1.2 mL L^-1 of Badge®WG280 (copper hydroxid+copper oxychloride), 2, 4, and 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 three physiological stages (the first in autumn after the leaves had fallen, the second at the end of March before the bud had swollen, and the third after the petals had dropped). Disease incidence and severity percentage were determined. Duncan's multiple range test was used to compare the mean disease severity and incidence percentages. The results showed that 6 g L^-1 of Barzidox® had the highest efficacy in reducing disease severity compared to the control in Golestan and Semnan provinces, with 81% and 80% respectively. Furthermore, the best performance of two indicator fungicides, Nordox® and Captan were 73% and 72% in Golestan province and 67% and 68%, in Semnan province, respectively. According to the results, it is concluded that 1.2 mL L^-1   of Badge® and 4 g L^-1  of Barzidox® have the best efficiency in controlling the peach leaf curl disease.

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