How to get rid of spider mites on currants? - briefly
Apply horticultural oil or neem spray to fully coat leaves, repeat after 7–10 days, and keep plants well‑ventilated. Introduce predatory mites (e.g., Phytoseiulus persimilis) for biological control.
How to get rid of spider mites on currants? - in detail
Spider mites infest currant vines by feeding on leaf tissue, causing stippling, yellowing, and premature leaf drop. Early detection prevents severe damage.
Inspect foliage weekly, focusing on the undersides where mites congregate. Look for fine webbing and tiny moving specks. A magnifying lens reveals the characteristic oval, reddish‑brown bodies.
Cultural measures reduce population pressure. Prune dense growth to improve air circulation and sunlight penetration. Remove and destroy heavily infested shoots, then clean tools with alcohol. Water the plants with a strong spray to dislodge mites; repeat every few days during hot, dry periods. Maintain soil moisture, as drought‑stressed vines attract higher mite numbers.
Biological controls provide sustainable suppression. Introduce predatory insects such as Phytoseiulus persimilis, Neoseiulus californicus, or Amblyseius swirskii. Release rates of 10–20 predators per square meter, repeating weekly until pest levels drop. Apply neem oil (2 % solution) or horticultural oil (1 % emulsified) in the early morning or late evening; both act as suffocants and deter feeding. Ensure coverage of leaf undersides and repeat applications at 7‑day intervals.
Chemical options are reserved for severe outbreaks. Select a miticide labeled for currants, such as abamectin (0.5 ml L⁻¹) or spirotetramat (0.5 % soluble concentrate). Follow label instructions precisely, observing pre‑harvest intervals and protective equipment requirements. Rotate active ingredients to prevent resistance development.
Monitoring after treatment confirms efficacy. Re‑inspect leaves after 3–5 days; a marked reduction in webbing and mite counts indicates success. Continue preventative cultural practices and periodic releases of natural enemies to keep populations below economic thresholds.