Suiguang City, Lulv Town, a vegetable farmer reported that his spinach plants were showing pale yellow spots on the leaves, which later turned the entire leaves yellow and caused them to die. When the leaves were wet, a gray mold layer could be seen on the surface of the lesions. What could this disease be? This is downy mildew of spinach, a common fungal disease that typically begins on the outer or lower leaves and gradually spreads upward and inward. It thrives in cool, moist conditions, making it particularly problematic in early spring or during periods of high humidity. To manage this disease, several control measures can be taken. First, agricultural practices are essential. After harvest, all fallen or diseased leaves should be removed from the field and either burned or buried deep in the soil to prevent further spread. Crop rotation with non-host plants for 2–3 years is also recommended to reduce pathogen buildup in the soil. Providing adequate nutrients and maintaining good plant health can improve resistance to infection. Proper planting density and controlled irrigation help reduce moisture levels in the field, which is crucial for preventing disease development. Chemical control is also an important part of managing downy mildew. Early application of fungicides is key. You can use 25% thiophanate-methyl wettable powder diluted at 600 times, or 25% metalaxyl wettable powder at 600 times. Another option is 75% chlorothalonil wettable powder mixed at 500 times. Additionally, 64% mancozeb (also known as Maneb) can be applied at a dilution of 400–500 times. It’s best to rotate between different fungicides to avoid resistance. Spraying should be done every 5–7 days, and you may need to apply it 2–3 times depending on the severity of the infection. Regular monitoring of the crop is essential, especially after rain or irrigation, as these conditions favor the growth of the pathogen. Prompt action at the first sign of infection can significantly reduce losses and ensure healthier spinach crops. Textile And Printing Chemicals Chemicals used for textile and printing, like Fixing Agent, decoloring agent, eco-fix agent. Formaldehyde-Free Color-Fixing Agent 1701,Formaldehyde-Free Fixer,Color-Fixing Agent,Color-Fixing Agent 1701 Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com