2022 Adult Spotted Lanternfly Status in PA Vineyards: October 14

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. Nineteen growers reported the absence of adult SLF in their vineyards; twenty-seven growers reported the presence of adult SLF in their vineyards between October 7 to October 13, 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, Centre, Clearfield, Cumberland, Fayette, Fulton, Huntington, Pike, Snyder, Sullivan, Union, Washington, Wayne, and Wyoming counties reported adult SLF absence.

Map source: www.fedstats.gov

The adult SLF population has increased in at least one vineyard in Chester, Cumberland, Franklin, Luzerne, Monroe, and Perry counties, while adult SLF populations have decreased in nineteen Pennsylvania vineyards.  The reported decrease in the adult SLF population was due to grower intervention (i.e., insecticide application) for eleven vineyards, while adult SLF density per vine decreased without insecticide application in eight vineyards.

At least one vineyard in Berks, Chester, Delaware, Lehigh, Schuylkill, and York counties reported that adult SLF existed in 30% or more of their vineyard acreage. Relative to last week’s reporting period, the average number of adult SLF per vine has decreased, with reports of below ten adult SLF per vine for the majority of vineyards.

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.