Green Industry - A Knowledge Portal for Commercial Horticulture in Wisconsin (sponsored by University of Wisconsin-Extension)

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Diagnostics

Woody Ornamentals

Rhododendron, Azalea (Rhododendron)

Common aphids (Several)
Numerous species with colors ranging from yellow to red to black with short oval bodies. Aphids are small but vary in size.

Russian sage (Perovskia)

Common aphids (Several)
Numerous species with colors ranging from yellow to red to black with short oval bodies. Aphids are small but vary in size.

Sage (Salvia)

Common aphids (Several)
Numerous species with colors ranging from yellow to red to black with short oval bodies. Aphids are small but vary in size.

Thyme (Thymus)

Common aphids (Several)
Numerous species with colors ranging from yellow to red to black with short oval bodies. Aphids are small but vary in size.

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Annuals
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Conifer
Deciduous-Shrub
Deciduous-Tree
Vines

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branches
flowers
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needles ✓
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trunk ✓

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greenhouse
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January
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May
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July
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September
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October
Early - Mid ✓ - Late
November
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December
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