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Bacterial Brown Spot (Beans)

Description: Warm temperatures, in the 80-90F range, and wet weather favor infection. The disease first shows up as yellow flecks on the leaves, which later turn dark brown. Individual spots are usually irregular in shape and remain fairly small, surrounded by a narrow yellow margin, but lacking a wide yellow halo.

Solution: Plant disease-free seed, rotate crops, burn infected plant tissues, and clean contaminated equipment. Avoid working with plants when they are wet, as bacteria are easily transmitted in films of water. To prevent infection, or reduce its spread, apply Soap-Shield Fungicidal Soap at 7-10 day intervals. Following heavy rain, or when the amount of disease is increasing rapidly, apply every 7 days, or even more frequently, at the highest recommended rate.



 



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