Rape winter management advice

In view of the fact that some of the current varieties and some of the crops have heavy frost damage, as long as the field management of frozen rape is still able to win high yields, the following field management measures are proposed.

1. Qinggou Drainage: Clean the silt in the ditch, reduce the groundwater level, reduce the soil moisture content, increase the ground temperature, and enhance the resistance of the rapeseed.

2, chase fertilization material: rape into the winter, the plant above ground growth and development slowed down, but the root growth is still relatively strong, especially after some of the leaves freeze to death, the axillary buds have a certain demand for nutrients, so the severe damage to the field Block to grab a proper amount of fertilizer supplement, topdressing 10-15 kg of ammonium per acre.

3. Prevention of pests and diseases: The main diseases and pests of rape after spring are Sclerotinia, downy mildew and aphids. Sclerotia are more common, and the damage is serious. In deepening the "three ditch", lowering the groundwater level, and removing the old leaves, the rate of diseased leaves was up to 10% at the early flowering stage, and the rate of diseased stems reached 1% in time for spraying control. The 50% carbendazim per mu was used to add water. 50kg or Shi Weiwei 200G plus water 60KG spray to prevent Sclerotinia sclerotiorum.

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