
Thrips
Tiny pale yellow to brown insects, 1 to 2 mm long, that crawl down inside the open tip of the hollow tubular leaf or hide where the leaf bases bundle together at the soil line. Hard to see without slitting a leaf open. Populations build fastest in hot dry weather from late May through July.
Silver or whitish streaks running the length of the hollow leaves, sometimes with tiny black dots of frass tucked inside the streak. Heavy feeding turns whole leaves bronze and limp. Damage is cosmetic on a culinary clump because chives regrow from the underground rhizome after a hard cut, but the current flush of leaves is unsightly until the next regrowth.
Cut the clump back to 2 inches and let it regrow
Chives respond beautifully to a hard chop. Cut the entire clump down to 2 inches with kitchen shears and bag the cuttings (do not compost). New clean leaves push up from the rhizome within 7 to 10 days. The cut-and-come-again pattern is faster and more reliable than spraying. Use the trimmings in the kitchen if they're mostly clean.
Strong water blast every 3 days for 2 weeks
Hold a hose nozzle 12 inches from the clump and spray hard from above and at the base of the leaves. The hollow leaves bend and spring back without damage. Repeat every 3 days for 2 weeks. Best for early infestations where you don't want to lose the standing flush of leaves yet.
Spinosad spray at dusk, every 7 days for 3 rounds
Mix spinosad (Monterey Garden Insect Spray or Captain Jack's Deadbug Brew, ~$15) per label rate.
Spray at dusk, soaking the bundled leaf bases at the soil line and letting some run down inside the hollow leaf tubes.
Repeat every 7 days for 3 rounds. Spinosad is approved for organic edibles and breaks down within 1 to 2 days, so chives are safe to harvest after the listed pre-harvest interval on the label.

