How to deal with the yellowing of winter rapeseed leaves is fat or disease? What should be done when the leaves of rapeseed are yellow? The common diseases of rapeseed leaves are mainly downy mildew and white rust. Downy mildew is characterized by the appearance of polygonal yellow lesions on the front of the leaves. In severe cases, the whole leaves are yellow and burnt, and there is a white mold on the back of the leaves when wet; white rust is a white bulge on the back of the leaves. The erythema ruptures after maturity, and it emits white powder. When it is severe, the whole piece also yellows. Control measures: 72% gram dew (cream urea manganese zinc) wettable powder 800 times, 50% nail cream copper wettable powder 600 times, 58% toxic myricium manganese zinc wettable powder 800 times, 70% B Manganese wettable powder 500 times solution, or an optional one of the above alternate sprays. Spraying the whole plant, focusing on the back of the leaf. Every 7 to 10 days, even spray 2 to 3 times. In field management, it is necessary to prevent excessive use of nitrogen fertilizer and appropriate application of phosphorus and potassium fertilizer. This article URL: How to deal with the yellowing of winter rape leaves is lack of fertilizer or disease TCT HANGZHOU DIAN BIOTECHNOLOGY CO., LTD. , https://www.dianbiotech.com