2022 Adult Spotted Lanternfly Status in PA Vineyards: October 28

The Penn State Grape and Wine Team sends out a weekly survey to learn more about the magnitude and severity of adult spotted lanternfly (SLF) populations throughout Pennsylvania vineyards. Eighteen growers reported the absence of adult SLF in their vineyards, while twenty-seven growers reported the presence of adult SLF in their vineyards between October 21 to October 27, 2022.

Below is a map showing counties with at least one vineyard that reported the presence of adult SLF during the current reporting period. At least one vineyard in Allegheny, Armstrong, Beaver, Bradford, Bucks, Butler, Cumberland, Fayette, Fulton, Lancaster, Northampton, Snyder, Somerset, Susquehanna, and Union counties reported adult SLF absence.

Map source: www.fedstats.gov

Adult SLF populations have increased in four Pennsylvania vineyards, while adult SLF populations have decreased in twenty-five vineyards.  The reported decrease in adult SLF populations occurred after an insecticide was applied in ten vineyards, while adult SLF populations decreased without grower intervention in fifteen vineyards.

At least one vineyard in Berks, Delaware, Lancaster, Lehigh, Monroe, Northampton, Schuylkill, and York counties reported that adult SLF existed in 20% or more of their vineyard acreage. Adult SLF density was below ten insects per vine in over half of the twenty-seven vineyards where adult SLF presence was documented. The highest adult SLF density (between 11–30 insects per vine) was reported in vineyards located throughout Adams, Berks, Chester, Delaware, Lehigh, Northampton, and York counties.

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 Vineyardsfact sheet for information about SLF management in vineyards. Please see The Penn State Extension Grape and Wine Team's website for previous reports of adult SLF trends in Pennsylvania vineyards in the 2022 vintage.

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