Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2011
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Forfattere
Annette Folkedal Schjøll Ingeborg Klingen Maria Bjørkman Pierre Antoine Allard Idun Bratberg Richard MeadowSammendrag
A successful push-pull strategy needs to include means to kill pest insects in order to control and reduce the pest population. The use of Chinese cabbage as a trap crop where insect pathogenic fungi may proliferate has been tested in a series of push-pull strategy experiments both in the laboratory, in semi-field and field. In this work, the aim is to develop a push-pull-kill strategy in which the transmission of the entomopathogenic fungi Entomophthora muscae is facilitated with the aim to reduce the population of cabbage- and turnip root flies (Delia radicum and Delia floralis). In the lab experiment, Chinese cabbage proved to be more attractive compared to Broccoli and Broccoli undersown with red clover, for oviposition of both healthy and E. muscae infected D. floralis females. Infected flies also died and sporulated on or near the Chinese cabbage. This pattern was also evident in a preliminary field study in which sporulating Delia spp. cadavers were found on Chinese cabbage only. These results indicate that Chinese cabbage may be used as a trap crop for D. floralis oviposition, but it may also be a sink where healthy flies become infected through contact with sporulating cadavers. This summer, we tested the strategy in larger scale and under more natural conditions in a semi-field study. Healthy D. floralis were released in cages with Broccoli and Chinese cabbage plants, with or without the presence of E. muscae infected D. radicum. Our hypothesis were that 1) D. floralis released in cages with infected flies will be infected, and die and sporulate on or near the Chinese cabbage, 2) Fewer eggs will be laid by D. floralis in cages with infection compared to control cages, 3) More D. floralis eggs will be laid on Chinese cabbage compared to Broccoli. The results from the semi field study strenghtens our previous results which showed that using Chinese cabbage as a trap crop is a promising strategy for the management of D. floralis and D. radicum, both as an oviposition attractant and as a source for fungal transmission between flies.
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Lars Olav Brandsæter Anne Kjersti Bakken Kjell Mangerud Hugh Riley Ragnar Eltun Haldor FykseSammendrag
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