Why does your Lilium oriental Tiber have fine webbing? Diagnose the cause and fix it with our step-by-step guide.
This is the most common cause of fine webbing on Oriental lilies. These arachnids thrive in hot, dry conditions and pierce the leaf cells to suck out chlorophyll, leading to stippling and eventual web formation.
While not a web itself, edema causes cells to burst due to excessive water uptake, creating small bumps that can sometimes be covered by fine, fungal mycelium or dust that mimics webbing. It is common in Liliums when humidity fluctuates wildly.
If you have recently used biological controls to fight spider mites, the leftover fine webbing from dead prey or movement can persist on the large, lush leaves of 'Tiber' lilies.