Keith R. Day

article

Interannual population dynamics of the green spruce aphid Elatobium abietinum (Walker) in France

Guy Lemperiere, Keith R. Day, Yves Petit‐Berghem, Nicolas Robinet, more

Annals of Applied Biology > 176 > 3 > 233 - 240

The hypothesis that similar processes govern interannual dynamics of green spruce aphid in the UK and France, is generally supported by the application of a general discrete model. A simple model based on relatively few parameters was able to closely characterise interannual population dynamics from completely independent aerial and arboreal samples of aphids. Long‐term field population estimates...

article

The effects of high temperatures on individuals and populations of the green spruce aphid Elatobium abietinum (Walker)

Nigel A. Straw, Freia M. Bladon, Keith R. Day, Nick J. Fielding

Agricultural and Forest Entomology > 21 > 1 > 69 - 78

Green spruce aphid Elatobium abietinum is an important defoliating pest of Sitka spruce Picea sitchensis that may become more damaging in the future as a result of climate change. Mild winters and higher spring temperatures increase E. abietinum population densities, although this positive response to warmer conditions might be over‐ridden if E. abietinum is adversely affected by exceptionally high...

article

Temperature‐dependent development of the great European spruce bark beetle Dendroctonus micans (Kug.) (Coleoptera: Curculionidae: Scolytinae) and its predator Rhizophagus grandis Gyll. (Coleoptera: Monotomidae: Rhizophaginae)

Claire A. Gent, David Wainhouse, Keith R. Day, Andrew J. Peace, more

Agricultural and Forest Entomology > 19 > 3 > 321 - 331

Dendroctonus micans is an invasive species that has spread throughout Britain, which prompts the question: how is the voltinism of this pest and its biocontrol agent Rhizophagus grandis affected by climate? Dendroctonus micans and R. grandis were reared at a range of constant temperatures. Lower developmental threshold temperature (LDT) and day degree (DD) requirements for the egg, larval and pupal...

book

Bark and Wood Boring Insects in Living Trees in Europe, a Synthesis

François Lieutier, Keith R. Day, Andrea Battisti, Jean-Claude Grégoire, more

For the first time, a synthesis on the research work done in Europe on all Bark And Wood Boring Insects In Living Trees (BAWBILT) is presented. As final product of a four-year research project gathering together 100 scientists from 24 countries, the book is the fruit of a real collective synthesis in which all European specialists have participated. It reviews and comments on all the European literature,...

article

Interaction between flight, reproductive development and oviposition in the pine weevil Hylobius abietis

Janine Y. Tan, David Wainhouse, Geoffrey Morgan, Keith R. Day

Agricultural and Forest Entomology > 13 > 2 > 149 - 156

1The development of reproductive and flight capacity of pine weevils Hylobius abietis during the spring and their dispersal to, and subsequent development at, new clearfell oviposition sites comprise key phases in their life cycle in managed forests. At an old clearfell site where autumn‐emerging weevils had overwintered, weevils were trapped as they re‐emerged in the spring and tested for their ability...

article

Flight ability and reproductive development in newly‐emerged pine weevil Hylobius abietis and the potential effects of climate change

Janine Y. Tan, David Wainhouse, Keith R. Day, Geoffrey Morgan

Agricultural and Forest Entomology > 12 > 4 > 427 - 434

1Adult pine weevils Hylobius abietis emerge from conifer root‐stumps, on which larvae develop, over an extended period during summer and autumn. Newly‐emerged weevils were tested for their ability to fly and assessed for wing muscle and reproductive development. In addition, the effect of summer–autumn maturation feeding on reproductive development was assessed in field bioassays. 2There was considerable...

article

Does shooting disturbance affect diving ducks wintering on large shallow lakes? A case study on Lough Neagh, Northern Ireland

Darren M. Evans, Keith R. Day

Biological Conservation > 2001 > 98 > 3 > 315-323

Waterfowl hunting is widespread and common throughout Europe, affecting waterfowl populations directly through the kill and indirectly through disturbance. Freedom from such disturbance is an important part of waterfowl management. However, most studies of the effects of disturbance on duck populations have been site specific with few attempts to synthesis the results of these local studies and use...

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Search results for: Keith R. Day

Interannual population dynamics of the green spruce aphid Elatobium abietinum (Walker) in France

The effects of high temperatures on individuals and populations of the green spruce aphid Elatobium abietinum (Walker)

Temperature‐dependent development of the great European spruce bark beetle Dendroctonus micans (Kug.) (Coleoptera: Curculionidae: Scolytinae) and its predator Rhizophagus grandis Gyll. (Coleoptera: Monotomidae: Rhizophaginae)

Bark and Wood Boring Insects in Living Trees in Europe, a Synthesis

Interaction between flight, reproductive development and oviposition in the pine weevil Hylobius abietis

Flight ability and reproductive development in newly‐emerged pine weevil Hylobius abietis and the potential effects of climate change

Does shooting disturbance affect diving ducks wintering on large shallow lakes? A case study on Lough Neagh, Northern Ireland

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INFONA - science communication portal

Search results for: Keith R. Day

Interannual population dynamics of the green spruce aphid Elatobium abietinum (Walker) in France

The effects of high temperatures on individuals and populations of the green spruce aphid Elatobium abietinum (Walker)

Temperature‐dependent development of the great European spruce bark beetle Dendroctonus micans (Kug.) (Coleoptera: Curculionidae: Scolytinae) and its predator Rhizophagus grandis Gyll. (Coleoptera: Monotomidae: Rhizophaginae)

Bark and Wood Boring Insects in Living Trees in Europe, a Synthesis

Interaction between flight, reproductive development and oviposition in the pine weevil Hylobius abietis

Flight ability and reproductive development in newly‐emerged pine weevil Hylobius abietis and the potential effects of climate change

Does shooting disturbance affect diving ducks wintering on large shallow lakes? A case study on Lough Neagh, Northern Ireland

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