Tiny insects called thrips feed on the leaves, weakening the plant. Here’s how to discourage them What’s the problem? My peace lily has recently developed silver and grey streaks on its leaves. It hasn’t been moved and there haven’t been any changes to its routine – it gets watered and misted once or twice a week. Any advice? Diagnosis Silver or grey streaks on peace lily leaves often signify thrips. These are tiny slender insects that feed by scraping the surface of leaves and sucking out the sap, leaving behind a silvery sheen or streaking. They enjoy warm, dry conditions, and can go unnoticed until damage becomes obvious. Continue reading...