Answer: It should be yellowing caused by iron deficiency. Appropriate application of organic fertilizer or foliar fertilizer should be applied. Iron-containing nutrient solution, such as ferrous sulfate, EDTA-Fe, etc., can be sprayed onto the foliage to mix with acidic pesticides. Spraying. According to the degree of yellowing, spraying once every 7 to 10 days, and even spraying 3 times on it.
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