نوع مقاله : بیماریشناسی گیاهی
نویسندگان
1 گروه گیاهپزشکی، دانشکده تولید گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گلستان، ایران
2 بخش تحقیقات گیاهپزشکی، مرکز تحقیقات کشاورزی و منابع طبیعی استان گلستان، سازمان تحقیقات، آموزش وترویج کشاورزی، گرگان، ایران
3 گروه علوم باغبانی، دانشکده تولید گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گلستان، ایران
4 گروه علوم زیستی، دانشکده علوم زیستی و پزشکی، دانشگاه هرتفورشایر، هاتفیلد، بریتانیا
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Blackleg disease of oilseed rape (Brassica napus L.), caused by the fungus Leptosphaeria maculans, is one of the major factors limiting canola production worldwide. This study was conducted to investigate the epidemiology of the disease and its relationship with climatic conditions in Golestan Province, Iran. The results showed that the disease occurred in all regions during both cropping seasons, but its severity and spread patterns are varied significantly among regions and years. During the leaf spot phase, the highest incidence and severity were recorded in the first year in Bandar-e-Gaz and in Gorgan in the second year. In the first year diseases incidence and deases severity were significantly associated with minimum temperature and relative humidity, whereas in the second year, maximum relative humidity and heavy rainfall events emerged as the dominant factors. During the stem canker phase, Aliabad showed the highest levels of disease incidence and severity in both years. Correlation analysis indicated that mild minimum temperatures, high relative humidity, and heavy rainfall wer strongly positively correlated with disease incidence and severity.
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کلیدواژهها [English]
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