Pepper
Symptom Cause  
Dark, round spots on fruit; entire pepper may rot or dry up;
Anthracnose (on plants)
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Leaves wrinkled or curled; discolored, stunted, tend to fall off
Aphids
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In dry areas, leaves develop yellowish spots with darker margins; older leaves die
Bacterial Spot
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Irregular, water-soaked spots may develop on leaves; plant becomes partly defoliated; stem end of fruit becomes grayish-green; blossoms or young fruits may drop
Blight, Early
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Irregular, water-soaked spots may develop on leaves; plant becomes partly defoliated; stem end of fruit becomes grayish-green; blossoms or young fruits may drop
Blight, Late
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No fruit form;
Blossom Drop
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Sunken, water-soaked spots on end of fruit
Blossom End Rot
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Holes chewed in leaves
Colorado Potato Beetle
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Holes chewed in fruit; may chew leaves
Corn Earworms
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Young plant severed at soil
Cutworms
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Seedling cut off at soil
Cutworms
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Tunnels in stalks
European Corn Borers
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Leaves riddled with shot holes; plant weakens
Flea Beetles
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Yellowing of foliage and gradual defoliation; plants may become stunted
Fusarium Wilt
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Leaves blotched with white trails
Leaf Miners
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Septoria and Stemphylium
Leaf Mold
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Foliage yellowed or white mottling, glaze of honeydew; plant weakens
Leafhoppers
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Leaves mottled yellow and green, raised dark areas; plant stunted
Mosaic Viruses
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Plant stunted, leaves yellowed, lesions on roots
Nematodes
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Leaves stippled; covered with webs
Spider Mites
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Leaves bronze, yellow rings, dead areas on leaf tips; leaf stalk, stems die
Spotted Wilt (fungus)
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Fruit becomes soft, wrinkled, light color
Sunscald
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Leaves eaten, black droppings on leaves
Tomato Hornworm
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Yellowing of foliage and gradual defoliation, plants may become stunted.
Verticillium Wilt
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Weakened plant, leaves yellowed, appears like flying dandruff when foliage disturbed
Whiteflies
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