Holes in tomato plant leaves
Thank you for your question. The most common insect causing this damage is described, along with control recommendations, here: https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/tomato-flea-beetle Although this is written primarily for commercial growers, the techniques suggested are appropriate for home gardeners as well, along with the chemical options listed for Home use. Hope this is helpful. Good luck!