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Pay close attention to the control of bacterial leaf spot of pepper
Bacterial leaf spot of peppers, caused by *Pseudomonas syringae*, is a common bacterial disease that affects pepper crops. The pathogen spreads through wind, rain, and irrigation water, often entering the plant through wounds on the leaves. The disease typically becomes active from July to August, when warm and humid conditions favor its development.
This disease primarily affects the leaves of mature pepper plants. Initially, small, yellow-green, water-soaked spots appear on the foliage. As the lesions grow, they turn reddish-brown or dark brown, resembling rust. The affected areas become thin and membranous, varying in size. The disease progresses rapidly, and in severe cases, it can cause extensive leaf drop, weakening the plant and reducing yield.
To manage bacterial leaf spot, it's important to maintain good field hygiene. After heavy rains, excess water should be drained promptly to prevent moisture buildup. Applying additional phosphorus and potassium fertilizers can help strengthen the plants' resistance. For chemical control, farmers can use 10% difenoconazole wettable granules diluted at 2000 times, 72% streptomycin soluble powder diluted at 3000 times, or 3% Bacterin wettable powder diluted at 1500 times. These treatments should be applied evenly, with intervals of 7 to 10 days, repeating 2 to 3 times depending on the severity of the infection.
In addition to these measures, crop rotation and using resistant varieties can also play a key role in long-term disease management. Regular monitoring of the fields is essential to detect early signs of infection and take timely action. By combining cultural practices with appropriate chemical treatments, growers can effectively reduce the impact of bacterial leaf spot on their pepper crops.