False spider mite
Brevipalpus spp.
5 host plants
Last updated
False spider mite feeds on yew foliage in the Puget Sound, causing discoloration and yellowing of needles that become stippled and eventually tan or brown. You will see damage develop gradually through spring and into summer, with affected needles appearing dull and lacking normal green color. Heavy infestations cause severe discoloration; affected trees look stressed and sickly. Damage is cumulative over the growing season.
Spray sulfur dust or insecticidal soap targeting new growth in spring when populations are building. Repeat applications every 10 to 14 days through early summer to keep populations low. Maintain adequate moisture around plants; water-stressed yews are more susceptible. Improve air circulation through careful pruning. Natural predatory mites often suppress populations if pesticides are minimized. Most home gardeners accept minor discoloration rather than pursuing frequent chemical applications.
Quick Reference
Cultural Controls
- biological control Spider mite populations are held down by cool, wet conditions early in the season.
- Natural enemies, particularly lady beetles (Stethorus spp.), minute pirate bugs (Orius spp.), and predator mites such as Typhlodromus spp.
- or Neoseiulus fallacis (syn.
- Amblyseius fallacis) can provide some natural control.
- However, due to the sensitivity of many pear varieties to spider mite feeding, the effect of natural enemies can be too slow or insufficient to prevent significant damage to...