2022 Adult Spotted Lanternfly Status in PA Vineyards: November 4

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. Twenty growers reported the absence of adult SLF in their vineyards, while fourteen growers reported the presence of adult SLF in their vineyards between October 28 to November 3, 2022.

Below is a map showing counties with at least one vineyard that reported the presence of adult SLF. At least one vineyard in Allegheny, Armstrong, Beaver, Berks, Bucks, Butler, Cambria, Clearfield, Cumberland, Fulton, Luzerne, Monroe, New Hampshire,  Sullivan, Susquehanna, Union, and Wyoming counties reported adult SLF absence.

Map source: www.fedstats.gov

Out of the twenty Pennsylvania vineyards that reported adult SLF absence, eight vineyards reported that adult SLF became absent after no intervention, and two vineyards reported that adult SLF became absent after insecticide application. Out of the fourteen vineyards that reported adult SLF presence, five of them had higher adult SLF populations than the previous reporting period, while adult SLF populations decreased without (five vineyards) or after (one vineyard) insecticide application in six vineyards.

Most grape growers reported that adult SLF existed in less than 20% of their vineyard acreage. Adult SLF density was below ten insects per vine in most vineyards where adult SLF presence was documented. At least one vineyard in Chester, Dauphin, or York counties reported the highest adult SLF density (11–20 insects per vine) for this reporting period.

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 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.