Why does your Acer shirasawanum have fine webbing? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyTiny arachnids thrive in hot, dry conditions and pierce the leaf cells of Japanese Maples to suck sap. The fine webbing is a protective structure created by the mites as they colonize the undersides of the foliage.
While not a pathogen itself, extreme lack of humidity causes 'Acer shirasawanum' to produce physiological stress signals that attract mite populations. This often results in stippling (small yellow dots) on the leaves alongside the webbing.
While lace bugs primarily cause chlorotic spotting, their presence can sometimes be accompanied by silk-like debris or secondary webbing from opportunistic mites. They target the tender new growth common in Shirasawa varieties.
Your plant might also be experiencing one of these issues:
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