Why does your Citrus paradisi have sticky leaves? Diagnose the cause and fix it with our step-by-step guide.
Aphids feed on the sap of grapefruit trees, excreting a sugary substance known as honeydew that makes leaves feel sticky. This often leads to secondary issues like sooty mold growth on the leaf surface.
Scale insects attach themselves to citrus stems and leaf veins, sucking nutrients and producing honeydew. Because they are stationary and often look like bumps, the sticky residue is often the first visible sign.
Whiteflies congregate on the undersides of citrus leaves and excrete large amounts of honeydew. A cloud of tiny white insects may appear when the foliage is disturbed.
These soft-bodied insects produce sticky honeydew and are often covered in a white, waxy powder. They tend to hide in the crevices of the grapefruit's leaf axils.
Your plant might also be experiencing one of these issues:
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