- Author: Houston Wilson
This week we observed the first eggs of the Western grape leafhopper (WGLH) on chardonnay near Hopland (Fig. 1B). Egg deposition by Virginia Creeper leafhopper (VCLH) continues to generally increase on white varieties in both Mendocino and Lake counties.
No eggs have been observed yet on red varieties that we're monitoring. While adults of both species are active at these sites, leaves of red varieties are not developed enough to support leafhopper egg deposition.
The vineyard we're monitoring in Upper Lake was recently sprayed, which likely accounts for decreased egg deposition (Fig. 1A). We're currently replacing this site with an unsprayed organic vineyard.
The first release of Anagrus daanei took place in a vineyard near Hopland on April 14.