Why does your Phalaenopsis Casablanca have fine webbing? Diagnose the cause and fix it with our step-by-step guide.
The presence of fine, silky webbing on orchid leaves is a hallmark sign of Spider Mites (Tetranychidae). These microscopic pests pierce the plant cells to feed on sap, causing stippling and eventual leaf chlorosis.
While webbing is usually biological, extremely low humidity can cause fine structural degradation or 'web-like' patterns of necrotic tissue on the edges of Phalaenopsis leaves. This occurs when the orchid cannot maintain moisture through its velamen.
While Thrips typically cause silvering or scarring rather than webs, a heavy infestation can sometimes lead to secondary fungal growth or debris that mimics a webbed appearance. They primarily target the developing flower spikes of Phalaenopsis.
Your plant might also be experiencing one of these issues:
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