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Common Plant Diseases and Symptoms

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Downy Mildew

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Yellow spots on upper leaves, fluffy white or grey growth underneath; stunted growth.

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Powdery Mildew

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White powdery growth on leaves and stems; leaves may turn yellow and die.

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Early Blight

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Circular brown spots with concentric rings on leaves and stems; can lead to defoliation.

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Anthracnose

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Dark, sunken lesions on fruits, leaves, or stems; distorted growth.

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Fusarium Wilt

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Yellowing and wilting, often starting with one branch or side of the plant; brown vascular tissue.

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Leaf Curl

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Curled or twisted leaves; stunted growth, reduced yield.

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Citrus Canker

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Raised lesions on leaves, fruit, and stems; fruit drop and defoliation.

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Bacterial Wilt

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Wilting and yellowing leaves; brown discoloration in plant's vascular tissue.

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Late Blight

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Dark, water-soaked spots on leaves and stems; white fungal growth under high humidity.

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Fire Blight

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Blackened branches and twigs resembling fire damage; ooze from cankers may be present.

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Grape Powdery Mildew

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White powdery film on grape leaves, stems, and fruit; can lead to fruit cracking.

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Banana Bunchy Top Virus

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Dark green streaks on veins, stunted growth, bunchy appearance in banana plants.

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Soybean Cyst Nematode

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Stunted growth, yellowing leaves, cysts on roots; reduced yield.

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Blight

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Leaf or fruit spots, wilting, rot; often leading to complete decay.

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Rust

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Pustules of reddish or orange spores; can cause defoliation.

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Verticillium Wilt

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Yellowing leaves, often beginning at the bottom of the plant; wilting despite moist soil.

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Apple Scab

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Olive green to black spots on apple leaves and fruit; can cause fruit deformation.

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Clubroot

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Swelling and distortion of roots, resulting in stunted plant growth and yellowing of leaves.

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