Why does your Rhododendron keiskei have fine webbing? Diagnose the cause and fix it with our step-by-step guide.
These microscopic arachnids thrive in warm, dry conditions and feed on the underside of Rhododendron leaves, injecting toxins that cause stippling. The fine webbing is a characteristic silk structure used by the mites to protect their eggs and move across the foliage.
A specific subspecies of spider mite that is highly prevalent in ornamental Ericaceous plants like Rhododendron keiskei. They create dense webbing during periods of drought stress, which can eventually lead to complete defoliation.
Extreme low humidity can cause the fine hairs on Rhododendron leaves to trap airborne dust and debris, which can superficially resemble thin webbing. This is often accompanied by leaf curling or brittle margins.
Your plant might also be experiencing one of these issues:
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