terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2023 9 Does spotted lanternfly phloem-feeding have downstream effects on wine volatiles? Preliminary insights into compositional shifts

Does spotted lanternfly phloem-feeding have downstream effects on wine volatiles? Preliminary insights into compositional shifts


Context and purpose of the study – The Spotted lanternfly (SLF), first detected in the U.S. in 2014, is an invasive phloem-feeding planthopper that poses a growing threat to grape and wine production in the U.S. In Pennsylvania, where it was first detected, reductions in grapevine production and fruit quality have been reported by commercial growers. Recent advances have begun to elucidate how SLF affects grapevine physiology and resource allocation, but no research has identified how SLF affects wine chemical composition and quality. Documented reductions in fruit sugar allocation due to heavy SLF phloem-feeding may have downstream effects on wine fermentation dynamics. Additionally, secondary metabolic responses stimulated by SLF may also influence berry chemical composition. The present study investigated SLF-mediated effects on wine composition through analysis of the volatile composition of wines produced from white- and red-fruited varieties of different Vitis parentage (e.g., Vitis vinifera vs. interspecific hybrids) following prolonged exposure to adult SLF phloem-feeding.

Material and methods – In 2020 and 2021, mature grapevines grown in a vineyard in Coopersburg (PA, USA) were exposed to different population densities of adult SLF ranging from 0-15 insects/shoot for about 30 days during the fruit ripening period. In 2020, we used 16 Riesling (Vitis vinifera) vines, while in 2021, 10 Cabernet Franc (Vitis vinifera) and 10 Noiret (Vitis hybrid) vines were used. All clusters per vine were harvested and fermented in triplicate as microvinifications in 50 mL centrifuge tubes. Wine volatile composition was analyzed using HS-SPME-GC-MS and XCMS Online was used to identify metabolite features (e.g., m/z at definite retention times corresponding to potential compounds). Compounds were identified using spectral data and the NIST spectral database and confirmed by authentic standards.

Results – Using an untargeted metabolomics approach, we identified 289, 231, and 73 features in Riesling, Cabernet Franc, and Noiret wines, respectively, that were significantly correlated to SLF infestation density. These features were used to identify 14 compounds in Cabernet Franc wines, 12 in Riesling wines, and 5 compounds in Noiret wines that were affected by prolonged SLF phloem-feeding. Most of the compounds identified thus far are fermentation-derived volatile esters and alcohols, suggesting that SLF phloem-feeding may be predominantly affecting wine volatile composition by altering primary fermentation dynamics. This may be a consequence of reduced fruit sugar accumulation, as juice total soluble sugars tended to decrease with increasing SLF infestation density for all 3 varieties. Additionally, quantification of the concentrations of selected grape-derived volatiles important for Riesling varietal character (e.g., linalool) indicated no relationship with SLF infestation density. While preliminary, these results suggest that SLF-mediated effects on wine volatile chemistry may primarily be a consequence of lowered fruit resource allocation and altered fermentation dynamics, at least within this study.   


Publication date: June 22, 2023

Issue: GiESCO 2023

Type: Article


Andrew HARNER1*, Suraj KAR1,2, Zeke WARREN1, Misha KWASNIEWSKI1, Michela CENTINARI1

1Penn State University, University Park, PA 16802, USA
Current Address: 2Oregon State University, Corvallis, Oregon, USA

Contact the author*


invasive pest, untargeted metabolomics, wine volatile composition


GiESCO | GIESCO 2023 | IVES Conference Series


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.