Yunxiang County, Dingdian Township, Zhuo Cun, Lao Zhengwen: Why did the red crack appear at the base of the leaf before the convulsions? Why do you see pods when seeding?
A: Some rapeseeds before the convulsions, part of the sun-facing surface of the leaf root can be seen inflated, cracking the cortex, showing purple spots, and to the upper and lower development. The leaves are thick and fragile, the tip of the leaf is reeled, the buds turn green and yellow, and some dry off, the petals are shrunken, the flowering is not very normal, the foliar flowers are less fruitful, or only flowerless. The occurrence of this symptom indicates that the application of boron fertilizer is neglected in the potential lack of boron in the soil or basal fertilizer. Rape is very sensitive to boron fertilizers, and the application of boron fertilizer can greatly increase production. In the middle and later period of management, boron fertilizer should be applied to the roots, and 0.1% to 0.2% of borax solution or 0.1% to 0.15% of Sonic boron solution can be sprayed.
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