بررسی وضعیت بیماری سفیدک‌پودری انگور در سه شهرستان منطقه سیستان، ایران

نوع مقاله: مقاله کامل پژوهشی

نویسندگان

چکیده

بیماری سفیدک­پودری انگور در اثر آلودگی با قارچ Erysiphe necatorایجاد شده و از مهمترین بیماری­های انگور در دنیا و ایران بشمار می­رود. جهـت بررسـی وضعیت آلودگی به این بیماری در منطقه سیستان طی دو سال زراعی 96-1395 و 97-1396 تعداد 30 تاکستان در سه شهرستان زابل، زهک و هامون انتخاب و یادداشت­برداری از آن­ها جهت ثبت داده­های مربوط به میزان وقوع و شدت بیماری بصورت هفتگی انجام پذیرفت. نتایج نشان داد که از لحـاظ بیشترین میزان وقوع بیماری در سال اول، دوم و مجموع دو سال، بین شهرستان­ها و تاکستان­ها اختلاف معنی­دار وجود ندارد اما در مجموع دو سال شهرستان­های زابل و زهک (6/57 و 2/57 درصد) به ترتیب دارای بیشترین و کمترین درصد وقوع بیماری در سطح منطقه بوده­اند. از لحاظ شدت آلودگی برگ و خوشه بین دو سال مورد بررسی و شهرستان­ها اختلاف کاملا معنی­دار(۰/۰۰۱(P< بوده و در مجموع دو سال از لحاظ شدت آلودگی برگ شهرستان­های هامون و زهک (1/23 و 6/20 درصد) و از لحاظ شدت آلودگی خوشه­ها شهرستان­های زابل و زهک (4/25 و 8/21 درصد) به ترتیب دارای بیشترین و کمترین درصد آلودگی بوده­اند. بر اساس سطوح زیر­منحنی­های پیشرفت بیماری، از لحاظ میزان وقوع بیماری بین دو سال، شهرستان­ها و تاکستان­ها اختلاف معنی­داری مشاهده نگردید اما از لحاظ شدت آلودگی برگ­ها و خوشه­ها، بین دو سال و شهرستان­ها اختلاف کاملا معنی­دار (۰/۰۰۱(P<، و در مجموع دو سال شهرستان­های هامون و زابل به ترتیب دارای بیشترین سطوح زیر­منحنی­های پیشرفت شدت آلودگی برگ و خوشه (9/696 و 3/680) بودند.

کلیدواژه‌ها


عنوان مقاله [English]

Study on the infection status of powdery mildew of grapevine in three county of Sistan region, Iran

نویسندگان [English]

  • Z. Nasirpour
  • M. Salari
  • M. A. Aghajani
  • A. A. Taheri
چکیده [English]

Grape powdery mildew (PM) caused by plant pathogenic fungus Erysiphe necator, is the most important disease on grapevine in world and Iran. In order to study the spread of this disease in vineyards of Sistan region, 30 vineyards in three county including Zabol, Zahak and Hamoon were selected during years 2017 and 2018. The vineyards were visited on a weekly basis to record PM incidence (I) and disease severity (S). Based on disease incidence, there were no significant differences between counties and vineyards in first, second and combined two years, and in combined two years Zabol and Zahak (57.6%, 57.2%) had the highest and lowest percent of disease incidence.Based on leaf and fruit disease severity, there were significant differences between counties and two years (P­<0.001) and in combined two years Hamoon and Zahak (23.1%, 20.6%) had the highest and lowest percent of infection in leaves. Based on the fruit disease severity, Zabol and Zahak (25.4%, 21.8%) had the highest and lowest percent of infection in fruits respectively. Based on area under disease progress curves, there were no significant differences between years, counties and vineyards in disease incidence but in leaf and fruit disease severity, there were significant differences between years and counties and in combined two years Hamoon and Zabol (696.9 and 680.3) had the highest of leaf and fruit infections respectively.

کلیدواژه‌ها [English]

  • Erysiphe necator
  • Disease incidence
  • Leaf disease severity
  • Fruit disease severity
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