Yellow patches on cucumber leaves

Q: There are many yellowing patches on the large cucumber leaves in my greenhouse. However, it is not downy mildew. It starts with yellow-brown dots on the small veins and develops along the veins. Severe yellow leaves have become A fine mesh, what is this disease?

Answer: This is bacterial leaf blight. Starting from the damage of small leaf veins, serious dense mesh, can cause the leaves to turn yellow, and gradually develop from the bottom up, mostly caused by seed seedlings sick, cloudy days or after watering easily occurs. It should be sprayed with copper preparation and streptomycin. It can be sprayed with 600 times of Garrinong or 3000 times of DT500 times of streptomycin. It is sprayed once every 5-7 days for 2-3 times. Mainly on the back.

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