Why does your Begonia coccinea have sticky leaves? Diagnose the cause and fix it with our step-by-step guide.
Aphids are small, soft-bodied insects that pierce the succulent stems and leaves of Begonia coccinea to suck out sap, excreting a sugary substance known as honeydew. This residue creates the characteristic sticky film on leaf surfaces.
Scale insects attach themselves to the stems and leaf petioles of Begonias, feeding on plant fluids and secreting honeydew that coats the foliage. Unlike aphids, these pests appear as stationary, waxy bumps.
Mealybugs produce a sticky residue as they feed on the plant's nutrients, often accompanied by white, cottony masses in the crevices of the Begonia foliage.
Some Begonia species possess nectaries that secrete nectar to attract predatory insects; while less common as a primary symptom, an excess of this natural secretion can feel tacky.
Your plant might also be experiencing one of these issues:
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