How to eradicate spider mite on houseplants? - briefly
Isolate affected plants, rinse foliage with a strong stream of water, and apply insecticidal soap or neem oil every few days until no mites are observed.
How to eradicate spider mite on houseplants? - in detail
Spider mites thrive in dry, warm conditions and reproduce rapidly on foliage. The first step in any control program is to confirm their presence by inspecting leaves for tiny, moving specks and the characteristic stippled or yellowed patches. Check the undersides of leaves, where webs and eggs are most common.
Remove heavily infested foliage whenever possible. Prune affected stems with clean, sharp scissors and dispose of the cut material away from other plants. Wash the remaining leaves with a strong jet of water, using a spray bottle or garden hose, to dislodge mites, eggs, and webs. Repeat the rinse every few days for two weeks to interrupt the life cycle.
Increase ambient humidity, which hampers mite development. Place a humidifier nearby, mist plants daily, or group pots on a tray filled with water and pebbles. Raise the temperature slightly above the usual range for a short period (e.g., 75‑80 °F) to encourage natural predators, such as predatory mites, to become active.
Apply biological agents if chemical treatment is undesirable. Commercial preparations of Phytoseiulus persimilis or Neoseiulus californicus can be sprayed directly onto foliage; follow label rates and reapply every five to seven days until the pest disappears. For organic chemicals, use neem oil, insecticidal soap, or a horticultural oil, diluting according to manufacturer instructions and covering both leaf surfaces. Apply in the early morning or late evening to avoid leaf burn, and repeat every 5–7 days for at least three applications.
When synthetic acaricides are required, select products specifically labeled for indoor use and containing active ingredients such as abamectin, bifenthrin, or spiromesifen. Rotate chemistries to prevent resistance: after two applications of one class, switch to a different mode of action. Observe safety precautions—wear gloves, keep the area ventilated, and keep pets and children away during treatment and until the spray dries.
Maintain regular monitoring. Inspect plants weekly, focusing on new growth, and keep a record of infestation levels. If counts rise again, repeat the water rinse and consider a supplemental biological spray before resorting to chemicals. Consistent cultural practices—adequate watering, balanced fertilization, and proper lighting—strengthen plant vigor and reduce susceptibility to future outbreaks.