Leafhopper Newsletter

Egg deposition, nymphs, parasitism and parasitoid releases - May 18

Leafhopper egg deposition continues but we are also starting to see more first instar nymphs. We expect to see additional leafhopper nymphs emerge in the coming week.

Parasitism of Western grape leafhopper is now fairly consistent at all sites being monitored, indicating that the regional population of the parasitoid Anagrus spp. has colonized the vineyards. There is practically no parasitism of Virginia creeper leafhopper.

A batch of Anagrus daanei, the parasitoid that controls Virginia creeper leafhopper, was released on May 13 in Mendocino County near Hopland.