Hardy Geranium

Symptoms: fuzzy gray-brown mold on leaves, stems, flowers, or fruit; soft watery rot on fruit and blossoms; dieback from cut or wounded stems; mold spreading in cool humid still conditions; blighted flowers that fail to set

• CulturalRemove infected tissue and old blossoms●●●Strongstrong evidence — extension confidence

  Prune out moldy leaves, stems, and fruit and clear fallen blossoms and debris where the fungus gets started, disposing of them rather than composting.

  Source: UMN Extension; Cornell

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• CulturalImprove airflow and reduce leaf wetness●●●Strongstrong evidence — extension confidence

  Space and stake plants for good air movement, water at the base in the morning, and harvest ripe fruit promptly so botrytis has fewer cool, humid, wet surfaces to colonize.

  Source: UMN Extension; Cornell

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Symptoms: fine pale stippling/speckling on leaves; fine webbing on undersides in hot dry spells; leaves bronzing and dropping

• CulturalHose down and raise humidity· every 3 days · ~2 wks●●●Strongstrong evidence — extension confidence

  Mites thrive in hot, dry, dusty conditions. Spray foliage (especially undersides) with water to dislodge them and reduce dust.

  Source: UC IPM

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• OrganicInsecticidal soap or horticultural oil - label use only· every 5 days · ~2 wks●●Moderatemoderate evidence — extension confidence

  Apply to undersides per label; mites resist many products, so soaps/oils are preferred. Not in extreme heat.

  Always follow the product label — it is the law.

  Source: UC IPM

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Symptoms: clouds of tiny white insects fly up when plants are disturbed; yellowing stippled leaves; sticky honeydew and black sooty mold; weak stunted growth

• CulturalRemove infested leaves and hose off· every 4 days●●Moderatemoderate evidence — extension confidence

  Pick off and discard heavily infested lower leaves and rinse colonies off undersides with a strong spray of water; yellow sticky cards help monitor numbers.

  Source: UC IPM: Whiteflies

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• OrganicApply a labeled soap or oil· every 1 wk · ~3 wks●●Moderatemoderate evidence — extension confidence

  Apply a labeled insecticidal soap or neem oil per the label, covering leaf undersides; these reduce but won't eliminate whiteflies, so repeat as needed.

  Always follow the product label — it is the law.

  Source: UC IPM: Whiteflies

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Symptoms: clusters of tiny soft-bodied insects on new growth and undersides; sticky honeydew or sooty mold; curled distorted new leaves; ants tending them

• CulturalBlast off with water· every 3 days · ~2 wks●●●Strongstrong evidence — extension confidence

  Knock colonies off with a strong jet of water in the morning; repeat every few days. Light infestations rarely need more.

  Source: UC IPM: Aphids

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• OrganicInsecticidal soap - label use only· every 1 wk · ~3 wks●●Moderatemoderate evidence — extension confidence

  For persistent colonies apply insecticidal soap to undersides per label. Avoid open flowers.

  Always follow the product label — it is the law.

  Source: UC IPM

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