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The distance between forests and crops affects the abundance of Drosophila suzukii during fruit ripening, but not during harves

Cahenzli, Fabian; Bühlmann, Irene; Daniel, Claudia and Fahrentrapp, Johannes (2018) The distance between forests and crops affects the abundance of Drosophila suzukii during fruit ripening, but not during harves. Environmental Entomology, doi:, 10.1093/ee/nvy116.

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Drosophila suzukii (Matsumura; Diptera: Drosophilidae) is an invasive pest with the ability to reproduce not only in various soft fruit crops, but also in numerous wild hosts. Forests and forest edges harbor many wild hosts, provide suitable microclimatic conditions and are therefore thought to enhance the abundance of D. suzukii. Although the comprehension of pest activity based on specific landscape elements is important to implement efficient management strategies, knowledge of how forests affect the abundance of D. suzukii in nearby crops is very limited. We conducted a monitoring study with liquid baited traps across different crops at different distance from the forests. During fruit ripening, more flies were captured in crops closer to forests (22.21 % decrease per 500 m distance), whereas there was no significant relationship during harvest. Since color can affect the efficiency of D. suzukii traps, we have used traps either with a red or black lid. Acquired data suggest that traps with black lids capture significantly more flies than traps with red lids. We provide a quantitative estimation of how and when distance from adjacent forests affects the abundance of D. suzukii in crop fields. Our results can help consultants and farmers to estimate the pest pressure of D. suzukii in crop fields near forested, noncrop areas and to implement appropriate control strategies when D. suzukii populations increase and fruit becomes susceptible to infestation.

EPrint Type:Journal paper
Keywords:Drosophila, Landschaft area wide, distribution
Subjects: Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Plant Protection and Biodiversity
Deposited By: Daniel, Dr. Claudia
ID Code:33703
Deposited On:22 Aug 2018 12:03
Last Modified:22 Aug 2018 12:04
Document Language:English
Refereed:Peer-reviewed and accepted

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