Prevention and treatment of dwarf and sterile disease of rape
Boron deficiency is caused by many factors. in addition to the application of boron fertilizer, the content of available boron in soil should also be increased. Spray boron on the seedbed. One to two days before transplanting, 50 liters of borax solution per mu of seedling bed was sprayed. According to the degree of boron deficiency in soil, one control at seedling stage or one at seedling and bolting stage, 50 grams of borax per mu and 50 liters of water were sprayed on leaves each time. After flowering, if there is a flowering and unfruitful phenomenon, 50 grams of borax can be used per mu, 50 liters of water can be added, and sprayed outside the root. Before rape transplanting, 10 kg boron-calcium-magnesium phosphate fertilizer per mu also had a good effect.
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