How to treat a cactus for spider mite? - briefly
Inspect and isolate the cactus, then apply insecticidal soap or neem‑oil spray thoroughly, repeating every 5–7 days until mites are gone. Remove heavily infested pads and maintain low humidity to discourage future outbreaks.
How to treat a cactus for spider mite? - in detail
Spider mite infestations on succulents develop quickly under dry, warm conditions. Inspect leaves regularly; fine webbing, stippled discoloration, and tiny moving specks indicate presence. Early detection prevents severe damage.
Remove heavily infested sections with a sterile knife or scissors, discarding material away from other plants. For the remaining foliage, rinse with a strong stream of lukewarm water, forcing spray between spines and under the crown. Repeat every two to three days for two weeks to dislodge mites and eggs.
Apply a horticultural oil (e.g., neem, jojoba, or mineral oil) at a concentration of 1–2 %. Thoroughly coat all surfaces, including stems and the undersides of pads. Oil suffocates mites and disrupts their life cycle. Reapply after 7–10 days if new activity appears.
Insecticidal soap works as an alternative. Mix 2–5 % liquid soap with water, ensuring a mild, non‑detergent formulation. Spray until runoff, covering all plant parts. Repeat every 5–7 days for three applications. Avoid excessive soap, which can cause cactus tissue burn.
When infestations persist, use a systemic miticide labeled for succulents, such as abamectin or bifenthrin, following manufacturer dosage and safety instructions. Apply only after oil or soap treatments have dried completely, and observe a 14‑day withdrawal period before any edible use.
Maintain optimal cultural conditions to discourage mites: keep humidity above 50 % when possible, provide regular but moderate watering, and ensure good air circulation. Avoid overhead watering that leaves water on the surface for extended periods, as this creates a favorable environment for mite proliferation.
Regular monitoring, prompt mechanical removal, and a rotation of oil, soap, and, if necessary, targeted chemicals constitute an effective, detailed protocol for controlling spider mites on cactus plants.