Arthropods in the spotlight – identifying predators of vineyard pest insects with infrared photography

Author:

Reiff Jo Marie12ORCID,Theiss Konrad12,Hoffmann Christoph2,Entling Martin H.1

Affiliation:

1. RPTU Kaiserslautern‐Landau iES Landau, Institute for Environmental Sciences Landau in der Pfalz Germany

2. Julius Kühn Institute Federal Research Institute for Cultivated Plants, Institute for Plant Protection in Fruit Crops and Viticulture Siebeldingen Germany

Abstract

AbstractGrape berry moths, particularly Lobesia botrana Denis & Schiffermüller (Lepidoptera: Tortricidae), and vinegar flies, such as Drosophila melanogaster Meigen and Drosophila suzukii Matsumura (Diptera: Drosophilidae), are important vineyard pests, causing severe quality loss of grapes. Several arthropod taxa may be involved in the natural control of these pests. However, the role of arthropod predators in the natural control of vineyard pests remains unclear. We investigated 32 vineyards in the Palatinate region, southwest Germany, under organic and conventional management, which in both cases received either full or reduced fungicide applications (2 × 2 design). Predation of L. botrana eggs and pupae and D. melanogaster pupae on sentinel cards exposed in the vineyards was observed with infrared cameras. In total, nine predator taxa could be identified. The most dominant predator was the European earwig, Forficula auricularia L. (Dermaptera: Forficulidae), with 90% of all predation events. We conclude that F. auricularia is likely a key predator of vineyard pests, and that special attention should be paid to maintain it at high population densities.

Publisher

Wiley

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