Single and combined effects of Drosophila suzukii and Drosophila melanogaster on sour rot development in viticulture

• DOI: 10.1111/jen.12721
• Publication Date: 2019-12-11T04:24:57Z
• Authors: Wiebke Entling; Christoph Hoffmann
• Keywords: Drosophila Suzukii; Vineyard; Melanogaster

Abstract Sour rot is a disease complex that causes serious damage in viticulture. The common vinegar fly Drosophila melanogaster (Diptera: Drosophilidae) associated with sour overripe or otherwise damaged grapes. suzukii an invasive species, which suspected to induce previously undamaged grapes due the flies' ability infest healthy, soft fruits its serrated ovipositor. As consequence, infection of healthy by D. may facilitate colonization . We investigated single and combined effects on development measuring volatile acidity under near‐natural conditions vineyard, along laboratory experiments controlled climate. In 2017, field suggested presence increased levels at similar rate. 2018, showed only marginal increase treatments both species. Under more favourable conditions, , but not triggered emergence. A facilitating effect infestation for was detectable. These findings suggest does fact have potential trigger rot, will probably rarely do so least studied region. Instead, our study can impact as emphasizing need comparative studies.