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What is Blue Mold?

Blue mold, or Peronospora tabacina, is a fungal disease that affects tobacco plants, particularly in humid and warm climates. It appears as blue-gray spots on the leaves and can severely damage the tobacco crop if not treated promptly. This disease is a major concern for tobacco farmers, as it can reduce the yield and quality of the tobacco used for cigars. Farmers often use fungicides and controlled environmental measures to prevent or manage blue mold outbreaks. Ensuring that the tobacco used in cigars is free from blue mold is critical for maintaining the quality of the final product.