Spotted Wing Drosophila in Sweet Cherry Orchards in Relation to Forest Characteristics, Bycatch, and Resource Availability
Research Division Plant Protection, Agroscope, Müller-Thurgau-Strasse 29, 8820 Wädenswil, Switzerland
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Insects 2018, 9(3), 118; https://doi.org/10.3390/insects9030118
Received: 2 August 2018
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Revised: 4 September 2018
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Accepted: 10 September 2018
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Published: 13 September 2018
(This article belongs to the Special Issue Insect Population Dynamics: Theory & Practice)
Forest vegetation is essential for the population development of the spotted wing drosophila (SWD). Yet, little is known of how the structure of surrounding forest areas influence the abundance of SWD within orchards. In this work, we use data from a field trial at five sites in Switzerland to analyse the relationship between the extent of forest area, its edge density, and its distance from the orchard with the occurrence of SWD in sweet cherry orchards in a Bayesian hierarchical model. Availability of cherries and bycatch were also included in the model to account for effects of resource availability and trap attractiveness, respectively. For all main effects and their interactions, we accounted for potential temporal changes by adding interactions with time. We found that the closer an orchard was to a forest, the more SWD were trapped within the orchard. However, the interaction of forest proximity with forest area caused a disproportionate decrease of SWD catches. Also, the within orchard variables, trap catches of other drosophilid flies and resource availability affected SWD trap catches, but their relation changed in the course of the experiment. The findings imply that reducing SWD occurrence in orchards and other crop fields requires not only the consideration of processes outside and within the host crop field, but also of temporally changing relationships between SWD and other factors.
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Keywords:
forest; edge density; distance; Drosophila suzukii; bycatch; cherries
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MDPI and ACS Style
Hennig, E.I.; Mazzi, D. Spotted Wing Drosophila in Sweet Cherry Orchards in Relation to Forest Characteristics, Bycatch, and Resource Availability. Insects 2018, 9, 118. https://doi.org/10.3390/insects9030118
AMA Style
Hennig EI, Mazzi D. Spotted Wing Drosophila in Sweet Cherry Orchards in Relation to Forest Characteristics, Bycatch, and Resource Availability. Insects. 2018; 9(3):118. https://doi.org/10.3390/insects9030118
Chicago/Turabian StyleHennig, Ernest I., and Dominique Mazzi. 2018. "Spotted Wing Drosophila in Sweet Cherry Orchards in Relation to Forest Characteristics, Bycatch, and Resource Availability" Insects 9, no. 3: 118. https://doi.org/10.3390/insects9030118
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