GreenlyBusy Lizzie pests and diseases: how to recognise them
Impatiens walleriana
The pests, diseases and disorders recorded for busy lizzie in our library, each with a photo and its first symptom. Every page has the full list of symptoms, organic and chemical treatment and prevention.
At a glance
| Problems in total | 5 |
|---|---|
| Pests | 2 |
| Diseases | 3 |
| Need quick action | 2 |
Pests
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Two-spotted spider miteTiny yellowish-green mites with two dark patches, white cast skins and eggs on the leaf undersides — easiest to see with a 10× hand lens.Also called: red spider mitePhoto: Gilles San Martin from Namur, Belgium, CC BY-SA 2.0, Wikimedia Commons
Vine weevilGrubs also bore into cyclamen and begonia tubers and into the stem bases of cacti and succulents.Also called: black vine weevilPhoto: Opuntia, CC BY-SA 3.0, Wikimedia Commons
Diseases
Downy MildewPale green, yellow, purple or brown blotches on the upper side of leaves, often angular where they are bordered by the veins.Photo: Christian Hummert (Ixitixel), CC BY-SA 3.0, Wikimedia Commons_mit_Grauschimmel_(Botrytis_cinerea)-Josef_Schlaghecken.jpg/330px-Himbeere_(Rubus_idaeus)_mit_Grauschimmel_(Botrytis_cinerea)-Josef_Schlaghecken.jpg)
Grey mouldSmall, almost translucent spots that turn brown and water-soaked; affected tissue goes soft, dark and dies, and buds and flowers shrivel.Photo: Schlaghecken Josef, CC BY 4.0, Wikimedia Commons
Verticillium wiltOn raspberries and blackberries the fruiting canes can turn bluish-black and die as the fruit ripens.Photo: Howard F. Schwartz, Colorado State University, Bugwood.org, CC BY 3.0 us, Wikimedia Commons
Which busy lizzie problems need quick action?
These spread or do lasting harm fast; check the plants and start treatment the day you see them.
- Downy Mildew: A white, grey or purple mould on the underside of the leaf, directly below each blotch, in damp weather.
- Grey mould: On strawberries, grapes and other soft fruit a soft brown rot, often as the fruit ripens; on gooseberries whole branches die.
Plants with many of the same problems
Which plants each problem affects: sources
The links between these problems and the plant were checked against these pages.
