Hollyhock
Symptom Cause  
Light/purplish brown leaf spots; Black Areas; Leaves Yellow/wither/drop/die
Anthracnose (on plants)
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Leaves Wrinkled or Curled; Discolored, Stunted, Tend to fall off
Aphids
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Stems Break Off; Leaves Wilt
Common Stalk Borer
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Plant actually disappears or entire plant, blooms, stems are eaten
Deer
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Leaves Riddled With Shot holes; Caterpillar inside Stalk
European Corn Borers
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Holes In Leaves and Flowers
Japanese Beetles
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White Powder Coats Top of Leaves
Powdery Mildew
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Pale Yellow Spots on Leaves; Reddish Brown Pustules underside of Spots
Rust (on plants)
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Ragged Holes in Leaves, often in middle of leaf
Slugs and Snails
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Black powdery sooty mold fungus forms on honeydew; plants may die.
Sooty Mold
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Leaves Stippled/yellow/bronze/dry out/Drop. Webbing Visible; leaf galls
Spider Mites
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Lesions On Stems; Foliage Wilted
Stem Canker
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Deformed or Dwarfed Flowers
Tarnish Plant Bugs
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Leaves and Petals Are Pale; Silvery
Thrips
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Weakened Plants; Yellow Leaves; Leaves Discolored; Covered With Honeydew
Whiteflies
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