Managing Japanese Beetle Adults & Grubs While Minimizing Impacts on Pollinators Established in Wisconsin in the 1990s, the Japanese beetle (Popillia japonica) is a voracious defoliator of many landscape and garden plants. Roses, birches, lindens, grapes, raspberries, Norway maples, beans, apples, plums, crabapples, elms, beech, asparagus, and rhubarb are some of its favorite plant species. Typically, Japanese […]