Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Impatiens > Blotches or spots on leaves
Impatiens >Leaves > Blotches or spots on leaves
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Gray Mold
Botrytis cinerea
- Brown spots on leaves with concentric brown rings like a bull’s eye
- Brown blossoms or petals; flowers drop off prematurely
- Gray fuzzy mold develops on rotted tissue under humid conditions
- Disease develops during cool, wet weather
- More information on Gray Mold
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Impatiens Necrotic Spot Virus (INSV)
- Symptoms are extremely variable
- Stunted growth and wilting may occur
- Leaf distortion; ringspots or black spots on leaves and stems; blackish/purplish coloration along leaf veins
- Tip dieback and in some cases entire plant will collapse
- Lab test needed to identify INSV since it is difficult to diagnose on symptoms alone
- More information on INSV
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Flower Thrips
Frankinella spp.
- Active from June through September
- Feeding damage causes petals and leaves to have a stippled or silvery appearance
- Flowers turn black and prematurely fall off
- Tiny, black excrement can be seen inside damaged flower buds or on the underside of leaves
- Adults are 1/16 inch long, elongate, and range from yellow to brown. Nymphs are yellow
- More information on Flower Thrips
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Edema
- Pale-green to white blisters or bumps on the undersides of leaves
- Blisters brown with age and have a crusty or corky appearance
- Older leaves are more affected then younger ones
- Occurs when plants are overwatered during cool or humid weather
- More information on edema
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Sunscald
- Exposed parts of leaves bleach yellow to white
- In severe cases, affected areas turn brown and brittle
- Symptoms more severe in dry hot weather
- More information on Sunscald
