Whitehall Project: Leafy Spurge Flea Beetles, where do they work?

There are 6 species of flea beetles approved for release on leafy spurge. They are: Aphthona abdominalis

Aphthona cyparissiae

Aphthona czwalinae

Aphthona flava

Aphthona lacertosa

Aphthona nigrascutis

They are a very small beetle with a back "hopping" leg somewhat like a grasshopper. Some of these species are black, and some are coppery brown. The adults emerge from the soil from mid-June to mid-July in Montana. Adult feeding creates many holes and chewed edges on spurge leaves. They make an attractant pheromone (a chemical scent signal) that caused them to stay together in an area. The adults...