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Second, the appropriate spraying (1) spike differentiation process: This is a basic, essential basis. It is the appropriate period for spraying at the end of the florets.
(2) Leaf age index method: The leaf age index reaches 50-60% for the appropriate period of spraying. For example, Danyu No. 2, the total number of leaves of the variety is 22, and the spraying of chlormesonine is performed when 12-14 leaves are expanded. , It can increase production by 15-30% per mu.
(3) Stripping head method. When the corn enters the big horny period, it is peeled off from the base of the corn leaf at a depth of 7-10 cm, and the head of the tassel can be seen. This is the right time for spraying.
The use of corn chlorella
First, the appropriate amount of medication 1 acre (20 ml), against the water 30-40 kg prepared into a concentration of 600-800ppm of the liquid, you can spray.