Leafhopper Newsletter

Adults emergence continues in Mendocino and Lake Co. - July 7

TAIL GATE MEETING ON JULY 7
UCCE Area Wide Virginia Creeper Leafhopper Project Research Update
Date: July 7, 2016
Time: 8-10:00 AM
Place: South Gate of the Sundial Chardonnay Vineyard (across from the Fetzer winery in Hopland), located on Old River Road north of Old Hopland.
Details: 2CEU’s APPLIED FOR

MENDOCINO COUNTY

Remaining nymphs are 5th instar (stage) and adult emergence is well underway. We project that this week (July 3-9) most of the remaining nymphs will molt into adults and we will continue to see increased adult emergence and egg deposition.

LAKE COUNTY

Leafhopper populations are developing more slowly in Lake County relative to Mendocino County, where a majority of the nymphs are 4th-5th instar (stage), although we continue to see many more newly molted adults, indicating that adult emergence has begun.

This week (July 3-9) we expect to see some 5th instar nymphs along with many more adults, whose population will continue to increase in the following week (July 10-16).

With the start of adult emergence in Lake County, the ideal period for leafhopper control measures has ended for most vineyards in this region.

PARASITOID RELEASE PROGRAM

A batch of Anagrus daanei, the parasitoid that controls VCLH, was released on June 30 in Mendocino County near Hopland.