Whitefly nymph (likely citrus or greenhouse whitefly)

Undersides of leaves, especially on citrus, ornamentals, vegetables, and greenhouse plants in warm climates.

Nymphs and adults suck phloem sap, causing leaf weakening; they may also excrete sticky honeydew that supports sooty mold.

Nymphs remain largely immobile on leaf undersides, passing through scale-like stages; winged adults disperse when disturbed. Populations increase rapidly in warm conditions.

They can yellow leaves, reduce vigor, transmit some plant viruses, and promote sooty mold. They are generally harmless to humans and serve as prey for lady beetles, lacewings, and parasitoid wasps.