Tiny, Dust-Like Specks Moving on Leaves
At a glance, you might think your kale or Swiss chard is dotted with specks of dust. Lean in, and you’ll notice minute, moving dots—those are the mites themselves, barely 0.4 mm in length. Early in an infestation, these yellowish or greenish mites crawl across leaf surfaces, often on the undersides where they’re harder to see.
Their rapid reproduction means that what starts as a handful of mites can swell into thousands in no time. I learned this the hard way when a quick swipe of my hand on pepper foliage released a flurry of tiny mites into the sunlight—definitely a heart-stopping moment! Catching them at this stage allows for less intensive control measures, so keep your eyes peeled for these “dust” particles.