Dear Colleagues, There are several large fires threatening communities all over the state and causing concern. I want you to know we've been in touch with our colleagues in the fire zones and everyone is safe. Here's an update from the affected areas.
What's going on when manzanitas (Arctostaphylos sp) and Pacificmadrone (Arbutusmenziesii) peel their beautiful smooth red bark into cinnamon-like curls? Trees and shrubs with smooth bark lack a thick woody bark layer, so they need to employ alternative protective strategies.
Monitoring efforts during the week of May 14th showed the first emergence of VCLH nymphs for the season (see Table 1/Figure 1 for # VCLH nymphs per leaf). The numbers of nymphs decreased on the week of June 11th as the three vineyards we are monitoring were sprayed around that time.
On July 9 we surveyed parasitism of Western grape leafhopper (WGLH) and Virginia creeper leafhopper (VCLH) across 9 sites in Mendocino and Lake counties (Fig. 1). WGLH parasitism was fairly consistent (average 38%), but there was little to no VCLH parasitism (average 0.6%).
Virginia creeper leafhopper and Western grape leafhopper peak egg laying from the overwintering adults has passed (Fig. 1 & 2). Monitoring efforts during the week of May 14th showed the first emergence of VCLH nymphs for the season (see Table 1/Figure 3 for # VCLH nymphs per leaf).
Virginia creeper leafhopper and Western grape leafhopper peak egg laying from the overwintering adults has passed (Fig. 1 & 2). Monitoring efforts during the week of May 14th showed the first emergence of VCLH nymphs for the season (see Table 1 for # VCLH nymphs per leaf).
Virginia creeper leafhopper and Western grape leafhopper peak egg laying has passed (Fig. 1 & 2). Monitoring efforts during the week of May 14th showed the first emergence of VCLH nymphs for the season (see Table 1 for # VCLH nymphs per leaf).
Dear Colleagues, The California Natural Resources Agency, California Environmental Protection Agency, California Air Resources Board, the California Department of Food and Agriculture, and California Strategic Growth Council will be hosting regional public meetings on the development of California's...
