Alison from San Diego writes
BioCeres WP is not labeled to target gnats and yellow jackets. It is labeled for foliar-feeding pests, including aphids, white flies, thrips, plant bugs, beetles and weevils infesting labeled crops or use sites. For more information/product recommendations, please view our Fungus Gnat Treatment Guide and Yellow Jacket Treatment Guide
Answer last updated on: 08/29/2021