Leafhopper Newsletter

Adult emergence slowing, nymphs present in Mendocino and Lake Co. - July 26

MENDOCINO COUNTY

VCLH adult populations are low or in decline and the peak of the second flight is most likely over. Densities of WGLH adults continue to increase, especially in Redwood and Potter Valley and at the "Hopland2" site. Third brood VCLH/WGLH nymphs are present, most of which are 1st - 3rd instar (stage). Some 4th - 5th instar nymphs were seen at the Potter Valley and "Talmage2" site and are likely from the second brood.

LAKE COUNTY

Adult populations continue to level off and we are seeing second brood nymphs which are mostly 3rd instar (stage).

PARASITOID RELEASE PROGRAM

A batch of Anagrus daanei, the parasitoid that controls VCLH, was released on July 21 in Lake County near Kelseyville.