There should be two reasons. One is that the capillary roots are damaged by fertilization and watering, which causes nutrient deficiency. The second is a small amount of bacterial leaf spot. As the first case, through the flushing of amino acids, alginic acid, fish protein, and biological fungus fertilizers, rooting and rooting and soil improvement, combined with flushing of a small amount of nitrogen, phosphorus, and potassium, should be able to quickly change the leaves. Yellowing status. For bacterial leaf spot, you can spray chunlei thiazole zinc or chunlei king copper 500-600 times twice, with an interval of 3-5 days/time.
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