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Common Plant Diseases and Symptoms
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Downy Mildew
Yellow spots on upper leaves, fluffy white or grey growth underneath; stunted growth.
Powdery Mildew
White powdery growth on leaves and stems; leaves may turn yellow and die.
Early Blight
Circular brown spots with concentric rings on leaves and stems; can lead to defoliation.
Anthracnose
Dark, sunken lesions on fruits, leaves, or stems; distorted growth.
Fusarium Wilt
Yellowing and wilting, often starting with one branch or side of the plant; brown vascular tissue.
Leaf Curl
Curled or twisted leaves; stunted growth, reduced yield.
Citrus Canker
Raised lesions on leaves, fruit, and stems; fruit drop and defoliation.
Bacterial Wilt
Wilting and yellowing leaves; brown discoloration in plant's vascular tissue.
Late Blight
Dark, water-soaked spots on leaves and stems; white fungal growth under high humidity.
Fire Blight
Blackened branches and twigs resembling fire damage; ooze from cankers may be present.
Grape Powdery Mildew
White powdery film on grape leaves, stems, and fruit; can lead to fruit cracking.
Banana Bunchy Top Virus
Dark green streaks on veins, stunted growth, bunchy appearance in banana plants.
Soybean Cyst Nematode
Stunted growth, yellowing leaves, cysts on roots; reduced yield.
Blight
Leaf or fruit spots, wilting, rot; often leading to complete decay.
Rust
Pustules of reddish or orange spores; can cause defoliation.
Verticillium Wilt
Yellowing leaves, often beginning at the bottom of the plant; wilting despite moist soil.
Apple Scab
Olive green to black spots on apple leaves and fruit; can cause fruit deformation.
Clubroot
Swelling and distortion of roots, resulting in stunted plant growth and yellowing of leaves.
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