What are the key points to note in rapeseed cultivation and management?
How to prevent and control black rot in rapeseed? Please advise. The symptoms of black rot in rapeseed mainly affect leaves, stems and siliques. Both seedlings and mature plants can be affected. Infected leaves show yellow "V"-shaped spots, dark brown veins, and dark green water-soaked petioles, sometimes with yellow bacterial ooze, and the lesions expand until the leaves dry up. After bolting, the main axis...
What should be noted in rapeseed management? Please explainRapeseed management should note the following points:
First, apply bolting fertilizer well: for fields with insufficient base and seedling fertilizer, no winter fertilizer applied, and currently weak growth with obvious decline, apply 7.5-10 kg of urea per mu early as a relay fertilizer, and by mid-March apply an additional 5-7.5 kg of urea per mu as a flowering fertilizer; for normal fields, from late February to early March, apply a heavy bolting fertilizer uniformly, using 10-15 kg of urea per mu.
Second, prevent weed damage: for fields dominated by monocotyledonous (narrow-leaf weeds), you can choose 10.8% haloxyfop-R-methyl emulsifiable concentrate 30-40 ml or 5% quizalofop-p-ethyl emulsifiable concentrate 60-80 ml per mu; for fields dominated by broadleaf weeds, you can choose 50% clopyralid suspension concentrate 20 g per mu.
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