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Journal of Crop Protection، جلد ۱۰، شماره ۳، صفحات ۵۲۳-۵۳۳
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عنوان انگلیسی Efficacy of copper oxychloride base fungicides to control cucumber downy mildew in greenhouse conditions in Iran
چکیده انگلیسی مقاله The use of a multi-site fungicide in cucumber downy mildew protection programs are recommended to ensure crops are adequately protected and delay a possible resistance development of high-risk groups of single-site fungicides. Commercially available dicopper chloride trihydroxide (also known as copper oxychloride) based fungicides (M FRAC Group) were assessed for their efficacy against cucumber downy mildew in comparison to a commonly used phosphonate (Fosphite® 53 WSL, P7 FRAC Group) and untreated control. Foliar treatments started with the onset of disease symptoms and were repeated weekly. Disease severity was calculated twice during crop development. Significant differences between the treatments were detected. Fosphite® was the most effective among other treatments, with a reduction in disease severity of 82.6%. Among the copper oxychloride-based fungicides, statistically significant differences were detected. Copertox® and Oksavit® were significantly effective than the other products at the first disease assessment, and Copertox® being the most efficient fungicide at the second disease assessment. Significant differences were also detected among control plots. The efficiency of commercial brands of copper oxychloride in control of cucumber downy mildew was 53-67%. This efficiency is acceptable in normal disease conditions but not desirable in an epidemic situation. If the conditions are favorable for a severe disease epidemic, it is necessary to combine them with more effective fungicides such as Fosphite.  
کلیدواژه‌های انگلیسی مقاله Cucurbits, Foliar diseases, Oomycetes, Potassium phosphite, Multi-site fungicides
نویسندگان مقاله | Seyed Reza Fani
Plant Protection Research Department, Yazd Agricultural and Natural Resources Research and Education, AREEO, Yazd, Iran.


| Hossein Azimi
Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.


| Claudia Probst
Department of Agricultural Technology and Management, School of Engineering, University of Applied Sciences, Wels, Austria.
نشانی اینترنتی http://jcp.modares.ac.ir/browse.php?a_code=A-10-35214-1&slc_lang=en&sid=3
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