MySheen

Impatiens powdery mildew

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, Symptoms the disease mainly occurs on leaves and shoots. It usually begins in June, and the leaves are covered with white powder layer after July. Subsequently, small yellow dots were formed in the powder layer, and the color gradually darkened, and finally showed dark brown. The pathogens overwintered in the remnants of diseased plants and seeds. The following year, when the environment is suitable, the germs spread by wind and rain. The peak period of disease is from August to September. Prevention and control methods 1. Planting is not too dense, proper ventilation, strengthen fertilizer and water management, enhance plant disease resistance. Remove diseased leaves and plants

Symptoms the disease mainly occurs on leaves and shoots. It usually begins in June, and the leaves are covered with white powder layer after July. Subsequently, small yellow dots were formed in the powder layer, and the color gradually darkened, and finally showed dark brown.

The pathogens overwintered in the remnants of diseased plants and seeds. The following year, when the environment is suitable, the germs spread by wind and rain. The peak period of disease is from August to September.

Prevention and cure method

1. Planting is not too dense, proper ventilation, strengthen fertilizer and water management, enhance plant disease resistance. Remove diseased leaves and diseased plants and destroy them centrally so as to reduce the source of infection.

two。 During the onset of the disease, 15,000,1200-fold solution of the wettable powder, or 1000-fold solution of 70% methyl topiramate wettable powder were used for prevention and treatment. Avoid spraying at a high temperature above 32 ℃ to avoid drug damage.

 
0