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Université de Fribourg

Co-formulation of Beauveria bassiana with natural substances to control pollen beetles – Synergy between fungal spores and colza oil

Kaiser, Deborah ; Handschin, Stephan ; Rohr, Rudolf P. ; Bacher, Sven ; Grabenweger, Giselher

In: Biological Control, 2020, vol. 140, p. 104106

Pollen beetles (Brassicogethes spp.) are a major pest in colza (Brassica napus L., also known as oilseed rape) and show increasing resistance to commonly used insecticides. Entomopathogenic fungi (EPF) such as Beauveria bassiana have potential as a sustainable alternative means of control. However, field applications of fungal spores targeting the immigrated beetles on the crop have not been...

Université de Fribourg

Evaluation of resazurin-based rapid test to detect colistin resistance in Acinetobacter baumannii isolates

Germ, Julija ; Poirel, Laurent ; Cerar Kisek, Tjasa ; Cvitkovic Spik, Vesna ; Katja Seme ; Mueller Premru, Manica ; Lejko Zupanc, Tatjana ; Nordmann, Patrice ; Pirs, Mateja

In: European Journal of Clinical Microbiology & Infectious Diseases, 2019, vol. 38, no. 11, p. 2159–2162

Acinetobacter baumannii primarily causes colonization, yet it can be an opportunistic pathogen associated with hospital-acquired infections. Many countries report rapid spread of carbapenem-resistant Acinetobacter baumannii (CRAb) which limits treatment options, with colistin frequently being the last line treatment option. The aim of our study was to evaluate a recently developed rapid...

Université de Fribourg

Efficiency of natural substances to protect Beauveria bassiana conidia from UV radiation

Kaiser, Deborah ; Bacher, Sven ; Mène‐Saffrané, Laurent ; Grabenweger, Giselher

In: Pest Management Science, 2019, vol. 75, no. 2, p. 556–563

Solar radiation is assumed to be a major factor limiting the efficacy of entomopathogenic fungi used as biocontrol agents in open field applications. We evaluated 12 natural UV‐protective co‐formulants for their effect on the survival of UV‐ exposed Beauveria bassiana spores on agar plates, colza leaf discs and in the field.RESULTS: Colony‐forming unit (CFU) counts of unformulated...