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ارزیابی مقاومت رقم‌های تجاری سیب‌زمینی به بیماری لکه‌موجی در شرایط گلخانه و مزرعه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، بخش تحقیقات گیاه‌پزشکی، مرکز تحقیقات کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران

2 کارشناس ‏ارشد، بخش تحقیقات گیاه‌پزشکی، مرکز تحقیقات کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران

چکیده

قارچ‌های Alternaria alternata وA. solani عامل بیماری لکه‌موجی سیب‌زمینی بوده و بیشتر کشتزارهای سیب‌زمینی کشور را تهدید می‌کنند. لذا در جهت ارزیابی رقم‌های مقاوم و یا متحمل، بررسی‌هایی در سطح گلخانه با مایه‌زنی گونۀ غالب A. alternata و نیز در سطح مزرعه با آلودگی به‌طور طبیعی روی 24 رقم مورد کشت تجاری سیب‌زمینی در اصفهان و فریدن انجام شد. میانگین داده‌ها، در سطح گلخانه مشخص کرد، رقم‌های مارکیز، کنبک، پرمیر، آتلانتیک، سانته، سوناته و آگریا به­ترتیب، بر پایۀ درصد آلودگی، شدت و شاخص بیماری از حساس‌ترین رقم‌ها هستند و رقم‌های گرانولا، دیامانت، پیکاسو، مارادونا، مارفونا و نیز کایزر به ترتیب کمترین میزان آلودگی، شدت و شاخص بیماری را داشته که به­ترتیب به‌عنوان مقاوم‌ترین رقم‌ها مشخص شدند. نتایج به‌دست‌آمده از بررسی‌های صحرایی نیز کماکان با کمی اختلاف در ترتیب رقم‌ها نتایج به‌دست‌آمده از گلخانه را تأیید و از همان روند پیروی کرد. روند گسترش و پیشرفت بیماری در مراحل مختلف رشد در رقم‌های مورد بررسی نشان داد، رقم‌های مربوطه واکنش‌های یکسانی نسبت به بیماری لکه‌موجی نداشته و با اثر معنی‌دار از یکدیگر متمایز هستند.

کلیدواژه‌ها


عنوان مقاله [English]

Susceptibility assessment of commercial potato cultivars to early blight disease under the greenhouse and field conditions

نویسندگان [English]

  • Mehdi Nasr Esfahani 1
  • Giti Alizadeh Moghadam 2
  • Mohammad Ali Karimkhah 2
1 Associate Professor, Plant Protection Research Department, Isfahan Center for Research and Education in Agricultural Science and Natural Resources, (AREEO), Isfahan, Iran
2 M.Sc. Expert, Plant Protection Research Department, Isfahan Center for Research and Education in Agricultural Science and Natural Resources, (AREEO), Isfahan, Iran
چکیده [English]

The early blight disease of potato caused by Alternaria alternata and A. solani is one of the most important epidemic diseases of potato crop in Iran, out of which A. alternata is the dominant one. For resistance sources, 24 potato cultivars which are grown throughout Iran were assessed at greenhouse and field conditions. The infection percentages, severity, and disease scoring scales means showed that the cultivars Markies, Kennebeck, Premiere, Atlantic, Sante, Sonate, and Agria were the most susceptible ones under greenhouse conditions. However, the cultivars Granula, Diamont, Picasso, Maradona, and Kayzer were the most resistant ones and were ranged in the significant and respective groups of statistical analysis. The other cultivars reacted intermediately with a moderately resistance, tolerance, and moderately susceptible reactions with significant effects. The field results also showed almost the same results as for greenhouse experiments with significant statistical groups and distinct on the basis of the disease developments. The disease expansion in advanced stages of the crop growth showed an ascending level of developments in a varying degree with high significant effects, indicating that, the cultivars reacted independently and were distinct from each other on the basis of disease severity and scoring scale.

کلیدواژه‌ها [English]

  • cultivars
  • early blight
  • field
  • glass-house
  • growth stages
  • potato
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