Control

The use of antibiotics is not permitted in Switzerland; moreover, no other medication exists to combat European foul brood. Hives with symptoms must therefore be destroyed in order to limit the outbreak, and the contaminated material must be sanitised. Since prevention is the best cure, early detection is desirable. Numerous studies have been undertaken and documents have been created at the Swiss Bee Research Centre and elsewhere to draw the attention of beekeepers to these problems and inform them about the causes and the control measures to be implemented.

Merkblatt zur erkennung von Bienenbrutkrankheiten (German (PDF, 357 kB, 18.10.2017) and French (PDF, 226 kB, 02.02.2017))
M. Tschumi (2011)

Predation on Drosophila suzukii within hedges in the agricultural landscape.

Institutional Repository Agroscope

Siffert A., Cahenzli F., Kehrli P., Daniel C., Dekumbis V., Egger B., Furtwengler J., Minguely C., Stäheli N., Widmer F., Mazzi D., Collatz J.

Predation on Drosophila suzukii within hedges in the agricultural landscape.

Insects, 12, (4), 2021, 1-12.

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Link: MDPI

Zusammenfassung:

The invasive Drosophila suzukii feeds and reproduces on various cultivated and wild fruits and moves between agricultural and semi-natural habitats. Hedges in agricultural landscapes play a vital role in the population development of D. suzukii, but also harbor a diverse community of natural enemies. We investigated predation by repeatedly exposing cohorts of D. suzukii pupae be-tween June and October in dry and humid hedges at five different locations in Switzerland. We sampled predator communities and analyzed their gut content for the presence of D. suzukii DNA based on the COI marker. On average, 44% of the exposed pupae were predated. Predation was higher in dry than humid hedges, but did not differ significantly between pupae exposed on the ground or on branches and among sampling periods. Earwigs, spiders, and ants were the dominant predators. Predator communities did not vary significantly between hedge types or sampling peri-ods. DNA of D. suzukii was detected in 3.4% of the earwigs, 1.8% of the spiders, and in one predatory bug (1.6%). While the molecular gut content analysis detected only a small proportion of predators that had fed on D. suzukii, overall predation seemed sufficient to reduce D. suzukii populations, in particular in hedges that provide few host fruit resources.

ISSN Online: 2075-4450
Digital Object Identifier (DOI): https://doi.org/10.3390/insects12040305
Publikations-ID (Webcode): 46311 Per E-Mail versenden

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Predation on Drosophila suzukii within hedges in the agricultural landscape.