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Insects 2018, 9(2), 57;

Species Composition, Abundance and Seasonal Phenology of Social Wasps (Hymenoptera: Vespidae) in Wisconsin Vineyards

Department of Entomology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA
Author to whom correspondence should be addressed.
Received: 14 February 2018 / Revised: 23 May 2018 / Accepted: 24 May 2018 / Published: 31 May 2018
(This article belongs to the Special Issue Insect-Plant Interactions)
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Social wasps can be serious pests in fruit growing plantings and are becoming increasingly problematic for grape growers. In this study, we conducted two experiments to assess the species composition and seasonal phenology of social wasps in Wisconsin vineyards in 2015 and 2017. In 2015, three attractants were used: (1) wine; (2) heptyl butyrate (HB); and (3) acetic acid and isobutanol (AAIB) and in 2017, two attractants were used: HB and AAIB. In both years, the same eight species were trapped from the genera Vespula, Dolichovespula, and Polistes. The predominant wasp species trapped were Vespula maculifrons, Vespula vidua, Vespula flavopilosa, and Vespula germanica in 2015 and V. maculifrons, V. flavopilosa, V. germanica, and Dolichovespula maculata in 2017, in order of total abundance. The populations of V. vidua decreased in 2017 compared to 2015, indicating large inter-annual variation. In both years, AAIB lures trapped significantly more V. flavopilosa, V. maculifrons, and V. germanica, the three most prevalent species during grape harvest, than HB, whereas HB lures trapped more V. vidua than AAIB. Wine was generally attractive to all species in 2015. This study identifies for the first time the wasp species present in Wisconsin commercial vineyards using chemical attractants. This knowledge, along with the seasonal phenology of these pest species, will help facilitate the development of management strategies for social wasps in commercial vineyards. View Full-Text
Keywords: Vespula; Dolichovespula; Polistes; acetic acid; isobutanol; heptyl butyrate Vespula; Dolichovespula; Polistes; acetic acid; isobutanol; heptyl butyrate

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Guédot, C.; Hietala-Henschell, K.; Lois, A.N. Species Composition, Abundance and Seasonal Phenology of Social Wasps (Hymenoptera: Vespidae) in Wisconsin Vineyards. Insects 2018, 9, 57.

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