Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2019
Authors
Johan A. Stenberg Daniel Flø Lawrence R. Kirkendall Paal Krokene Beatrix Alsanius Christer Magnusson Mogens Nicolaisen Iben M. Thomsen Sandra Wright Trond RafossAbstract
No abstract has been registered
Authors
Wiktoria Kaczmarek-Derda Anne-Kari Holm Lars Olav Brandsæter Knut Asbjørn Solhaug Inger Sundheim FløistadAbstract
No abstract has been registered
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Authors
Richard Meadow Tor J. Johansen Gunda Thöming Annette Folkedal Schjøll Belén Cotes Christian NansenAbstract
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Abstract
We studied the effect of three Pandora neoaphidis isolates from one Sitobion avenae population, three temperatures, and two aphid species namely S. avenae and Rhopalosiphum padi on (i) aphid mortality, (ii) time needed to kill aphids, and (iii) aphid average daily and lifetime fecundity. A total of 38% of S. avenae and 7% of R. padi died and supported fungus sporulation. S. avenae was killed 30% faster than R. padi. Average daily fecundity was negatively affected only in S. avenae inoculated with, but not killed by, P. neoaphidis. Nevertheless, lifetime fecundity of both aphid species inoculated and sporulating with P. neoaphidis was halved compared to lifetime fecundity of surviving aphids in the control. Increased temperature resulted in higher mortality rates but did not consistently affect lethal time or fecundity. Results suggest that (i) temperature effects on virulence differ between isolates, even when obtained within the same host population, and (ii) even though an isolate does not kill a host it may reduce its fecundity. Our findings are important for the understanding of P. neoaphidis epizootiology and for use in pest-natural enemy modelling.
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Authors
Arne Stensvand Aruppillai Suthaparan Belachew Asalf Tadesse Ranjana Pathak Hans Ragnar Gislerød Knut Asbjørn Solhaug Pål Johan From Rodrigo B. Onofre Natalia A. Peres William Turechek Andrew Bierman Lance Cadle-Davidson David M. GadouryAbstract
No abstract has been registered
Authors
Arne Stensvand Aruppillai Suthaparan Belachew Asalf Tadesse Ranjana Pathak Hans Ragnar Gislerød Knut Asbjørn Solhaug Pål Johan From Rodrigo B. Onofre Natalia A. Peres William Turechek Andrew Bierman Mark Rea Lance Cadle-Davidson David M. GadouryAbstract
No abstract has been registered