Sclerotinia stem rot of canola in Golestan province

Subject Areas : دو فصلنامه تحقیقات بیماریهای گیاهی

M.A Aghajani ¹ (استادیار پژوهش بخش تحقیقات گیاهپزشکی، مرکز تحقیقات کشاورزی و منابع طبیعی استان گلستان، گرگان، ایران)
ناصر Safaie ² (دانشیار گروه بیماری شناسی گیاهی، دانشکده کشاورزی دانشگاه تربیت مدرس، تهران، ایران)
عزیزاله Alizadeh ³ (استاد گروه بیماری شناسی گیاهی، دانشکده کشاورزی دانشگاه تربیت مدرس، تهران، ایران)

Received: 2012-07-08 Accepted : 2013-02-09 Published : 2013-05-22

Keywords: Brassica napus, Sclerotinia sclerotiorum, Canola, Sclerotinia stem rot, Golestan Province,

Abstract :

Sclerotinia stem rot (SSR), caused by Sclerotinia sclerotiorum, is the most important
disease of canola (Brassica napus). This disease has been observed in different regions of
Golestan province since the first years of canola planting. In order to study of infection
situation of the fields in the province, disease evaluating was carried out in 80 fields in four
locations (Gorgan, Ali Abad, Kalaleh and Gonbad) during 2006 and 2007. Statistical analyses
of disease data were performed based on disease incidence (I) and mean severity (S) of the
fields. The results revealed that the incidence (P=0.05) and severity (P=0.02) are significantly
different in the four locations. Minimum and maximum of average incidence was observed in
Kalaleh (10.7%) and AliAbad (22.11%), respectively, but Minimum and maximum of mean
severity was recorded in Gonbad (5.6%) and Ali Abad (17.2%), respectively. Minimum and
maximum of disease incidence was observed in Gorgan in 2006 (1%) and Ali Abad in 2006
(81.5%), respectively, that were equivalent to 0.6% and 66.75% disease severity.

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