one showing how close I am to the bud using a 10x handlens
one clean bud (no winter moth larva or frass)
Most winter moth caterpillars are not visible from the outside of buds yet. Buds need to be opened to see if there is a caterpillar inside. If you find many caterpillars inside you may want to spray with an insecticide soon. For apples, you may need to wait until the flower buds separate (but before the flowers open) to effectively spray an insecticide.