Medicinal plant North Adenophora yellowing

Symptoms, also known as chlorotic disease, occur frequently in the northern sand ginseng cultivation area. Starting from the new leaves, the leaf color changes to yellowish white, but the veins remain green. At the height of growth, the symptoms are particularly evident.

Cause iron deficiency. Department of physiological factors caused. Excessive water in the growing season or excessive salt content in the soil affects iron absorption and utilization. In addition, there are many underground pests, and the root-crown damage that affects nutrient absorption can also induce yellowing.

Control methods (1) Apply sufficient organic fertilizer, promote the use of enzyme compost composting. (2) Foliar spraying 1% ferrous sulfate solution at the onset of the disease, spraying once every 3-5 days, the phenomenon of yellowing can be eliminated.

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