2022 Adult Spotted Lanternfly Status in PA Vineyards: October 7

The Penn State Grape and Wine Team recently sent out a survey to learn more about the magnitude and severity of adult spotted lanternfly (SLF) populations throughout Pennsylvania vineyards. Sixteen growers reported the absence of adult SLF in their vineyards; twenty-two growers reported the presence of adult SLF in their vineyards.

Below is a map showing counties with at least one vineyard that reported the presence of adult SLF. At least one vineyard in Armstrong, Bedford, Bucks, Butler, Centre, Fayette, Fulton, Luzerne, Perry, Snyder, Union, Wayne, and Wyoming counties reported adult SLF absence.

Map source: www.fedstats.gov

Adult SLF population has increased in at least one vineyard in Adams, Allegheny, Cumberland, Lancaster, and Montgomery counties. If adult SLF populations have decreased, it was due to grower intervention (i.e., insecticide application).

At least one vineyard in Berks, Chester, Lancaster, Lehigh, Northampton, Schuylkill, and York counties reported that adult SLF existed in 50% or more of their vineyard acreage. Relative to last week’s reporting period, there were more reports of a decrease in average adult SLF density per vine after insecticide application. Still, at least one vineyard in Berks, Lancaster, and York counties reported densities of over thirty adult SLF per vine in the infested acreage.

We thank all stakeholders for their participation in this survey! Please retake the survey weekly so that we can report updates on a continuing basis. We estimate the survey will take approximately three minutes to complete.

You may access the survey here: Weekly Adult SLF Survey.

Please see the Spotted Lanternfly Management in Vineyards fact sheet for information about SLF management in vineyards.

Please contact the authors below for any questions you may have about SLF in your vineyard.