What's eating my begonia 'shamus'?

Begonia 'Shamus', kept indoors, is most often troubled by spider mites, which rapidly colonise begonia foliage in heated rooms with low humidity. Mealybugs and whiteflies are secondary concerns. Routine leaf inspection and maintaining humidity above 50% are the best preventive measures.

Pale speckled stippling on upper leaf surface; fine webbing on undersides; leaves may dry and drop Shower plant with lukewarm water, then apply neem oil or insecticidal soap spray; repeat every 5–7 days

White powdery wax and cottony clusters at stem nodes and leaf undersides; honeydew and ants Dab with alcohol swab, then follow up with a systemic neem oil drench if infestation is widespread

Tiny white flies that flutter up when disturbed; yellowing leaves and sticky honeydew on surfaces below Use yellow sticky traps to monitor numbers; spray undersides of leaves with insecticidal soap or neem oil