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Comprehensive control of chrysanthemum downy mildew in autumn

Published: 2024-11-22 Author: mysheen

Last Updated: 2024/11/22, The downy mildew of Artemisia annua is mainly harmful to leaves. At the initial stage of the disease, a light yellow nearly round or polygonal disease class was produced on the old leaves of the lower part of the plant, which gradually spread to the middle and upper part of the plant, and the disease class was yellowish brown in the later stage. When the humidity is high, there is a white mildew layer on the back of the class. Bacterial infection.

Planting density should be reasonable, avoid over-close planting; re-apply base fertilizer, increase organic fertilizer, control the amount of nitrogen fertilizer, prevent excessive growth; do not flood irrigation, timely drainage after heavy rain. Can you choose 58% nail cream at the initial stage of the disease? Manganese zinc wettable powder 500 times liquid, or poison alum 64% bad mold? Manganese-zinc wettable powder 500 times liquid spray, once every 7 to 10 days, 2 times for 3 times. The fields cultivated in protected areas can be fumigated with chlorothalonil.

Very cool article!