Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 2
Written by Dimitar VASILEV, Lyuben STOYANOV, Svilen RAYKOV
Rapeseed is grown because of the seeds which are rich in fat (30-49%). This makes it the most important plant rich in oil and protein in temperate climate zone. Thanks to this, in the last few decades rapeseed has taken the honorable third place in the world production of vegetable oils. The aim of the present study is to establish the phytosanitary condition of the cultivated rapeseed in the area of the Kavarna town. The present study includes four cultivars of rapeseed grown in the area. As a result of the study it was found that the studied cultivars are characterized by high winter hardiness - 90.5% and good productivity 359.8 kg/da. The rapeseed oil reaches an average content of 47.8%. The low content of glucosinolates in the seeds of rapeseed cultivars 13.3 µmol/g allows quality oil production. The average erucic acid content is 1.31%. Economically important fungal diseases in the autumn for the area of Kavarna town are Phoma (Leptosphaeria maculans), Alternaria (Alternaria brassicae) and Powdery mildew.
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