Vineyard Pests: Brood X Periodical Cicadas Coming to a Vineyard Near You

This was the title of an article in the March 2021 Viticulture Notes by Tony K. Wolf, Viticulture Extension Specialist, AHS Jr. Agricultural Research and Extension Center, Winchester, Virginia and based on information from Dr. Doug Pfeiffer’s fruit extension site: https://www.virginiafruit.ento.vt.edu/. 

For those of us in Fairfax County Virginia, the 17-year, periodical cicada ‘Brood X’ has emerged in full force creating a mess on our driveways and walkways while emitting a deafening racket.  According to the Viticulture Notes article, residents of the northern Shenandoah Valley and parts of the northern piedmont can expect a similar situation. But what effect will the cicadas have on vineyards?  I reached out to several growers and wine producers and want to thank Jake Busching (Jake Busching Wines), Shannon Horton (Horton Vineyards), Jennifer Breaux (Breaux Vineyards), and Jack Sexton (Williams Gap Vineyard) for their responses.

https://www.cicadas.info/

Jake Busching had the most succinct answer. "Cicadas will harm new canes. They have a saw on their abdomen that cuts deep furrows into the cane so they can inject their eggs. The cane will most likely die from that point outwards. If you have older pruned vines you’re fine".  And Wolf explains, "...because lateral buds and shoots can easily compensate for the shoot damage that can occur with older vines ... injured shoots will be pruned off later ".  He continues, "However, young vines are subject to severe injury, with females using even the trunks as oviposition sites.  Oviposition may occur at multiple sites on one shoot or young trunk; affected areas become weak and will break easily (Eggs in the shoots may be seen on dissection of the injured material). Young vineyards should be protected."

It's obviously too late now, but the best advice is not to plant a new vineyard 1-2 years before an expected emergence of periodical cicada.