Cowpea lacks boron, which is manifested by necrosis of the growth point, dry top of the vine, hard and easy to break leaves, cracking of the stem, unfruitful flowers or few grains in the pod, and no grains in severe cases. The solution to the problem is to spray boron-containing foliar fertilizers such as Borme, Sule Boron, and Photosynthetic Power before blooming. In an emergency, 0.5% borax solution can be sprayed on the foliage. Spraying amino acid molybdenum 500 times liquid mixed with sule boron 1200 to 1500 times liquid before flowering can greatly increase its flowering pod setting rate, and avoid the phenomenon of falling flowers and pods and bending of pods caused by boron deficiency.
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