Planning reference

Spider Mites vs Whiteflies

Compare spider mites and whiteflies by stippling, webbing, tiny moving dots, adult flight, honeydew, sooty mold, heat, dust, water stress, and natural enemies.

What each underside pest clue can mean

Spider mites
Spider mites are tiny arachnids that feed on leaf undersides. Heavy pressure often shows as pale stippling, bronzing, fine webbing, cast skins, and tiny moving dots when leaves are tapped over white paper.
Whiteflies
Whiteflies are tiny white moth-like sap-feeding insects that settle on leaf undersides. Adults usually fly up when disturbed, then resettle; immature stages and honeydew can stay on the leaf.
Stippling, webbing, and tiny moving dots
Fine pale stippling, bronzing, webbing, cast skins, and specks that move after a tap test point more strongly toward spider mites, especially during hot, dry, dusty, or water-stressed periods.
White adults fly up from undersides
A small cloud of white adults lifting from leaf undersides after tapping points more strongly toward whiteflies, especially on tomato, cucumber, eggplant, squash, beans, lettuce, okra, and sweet potato.
Honeydew, sooty mold, heat, and dust
Sticky honeydew and black sooty mold point toward whiteflies or other sap feeders, while heat, dust, drought stress, and recent broad-spectrum sprays can favor spider mite outbreaks.

Decision workflow

Confirm the active pest
Do not treat every pale, stippled, sticky, or webbed leaf as the same pest; check undersides, tap leaves, look for webbing, tiny moving dots, cast skins, white adult flight, honeydew, sooty mold, ants, heat, dust, water stress, recent sprays, and natural enemies before treating spider mites or whiteflies.
Tap and flip leaves
Tap suspect leaves over white paper and then turn them over. Spider mites may show as moving specks near stippling or webbing; whitefly adults usually fly, while nymphs stay attached to undersides.
Separate residue from active pests
Honeydew, sooty mold, webbing, stippling, and bronzing can remain after a population changes, so find live mites, whiteflies, fresh webbing, active flight, or new feeding before escalating.
Correct stress before spraying
Dusty foliage, dry root zones, and heat-stressed plants can make mite pressure worse, while weak transplants can carry whiteflies in; fix water, dust, and plant-stress issues before routine spray responses.
Protect predators
Predatory mites, insects, and parasitoids help keep both pests in check. Avoid broad-spectrum sprays unless active pressure and crop value justify treatment, and follow label limits for edible crops.

Use these paths

Source basis