The leaves of Atractylodes macrocephala appear black necrotic spots after the beginning of autumn. The reason is that the high temperature and strong light irradiation causes damage to the leaves in the early stage. After the beginning of autumn, the temperature of the leaves decreases, and the growth rate of the leaves slows down, and the damage symptoms gradually appear. If the leaves in the field are not particularly large, no measures can be taken; if there are more, some foliar fertilizers and fungicides can be sprayed, such as cytokinins or brassinoline or difenoconazole.
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