The temperature‐dependent duration of development and parasitism of three cereal aphid parasitoids, Aphidius ervi, A. rhopalosiphi, and Praon volucre
- L. Sigsgaard
- Biology
- 1 May 2000
In both years, parasitoids were predicted to have emerged from overwintering mummies well in advance of the onset of aphid infestation, and more than a month earlier than the first parasitized aphids were found in winter wheat.
The Value of Producing Food, Energy, and Ecosystem Services within an Agro-Ecosystem
- J. Porter, R. Costanza, H. Sandhu, L. Sigsgaard, S. Wratten
- Business, MedicineAmbio
- 24 June 2009
This work estimated, via field-scale ecological monitoring and economic value-transfer methods, the market and nonmarket ES value of a combined food and energy (CFE) agro-ecosystem that simultaneously produces food, fodder, and bioenergy.
Early season natural biological control of insect pests in rice by spiders-and some factors in the management of the cropping system that may affect this control
- L. Sigsgaard
- Biology
- 2002
Future changes in the irrigated rice cropping system, such as direct seeding, chemical rather than manual weed control, mechanization and larger field sizes, will have significant impacts on spiders and other beneficials, thus disrupting natural biological control in rice.
Habitat and prey preferences of the two predatory bugs Anthocoris nemorum (L.) and A. nemoralis (Fabricius) (Anthocoridae: Hemiptera-Heteroptera)
- L. Sigsgaard
- Biology
- 1 April 2010
Perennial flower strips for pest control in organic apple orchards - A pan-European study
- F. Cahenzli, L. Sigsgaard, L. Pfiffner
- BiologyAgriculture, Ecosystems & Environment
- 1 June 2019
Early season natural control of the brown planthopper, Nilaparvata lugens: the contribution and interaction of two spider species and a predatory bug.
- L. Sigsgaard
- BiologyBulletin of entomological research
- 1 October 2007
In early rice, results show that A. formosana is an important predator of BPH and, like C. lividipennis, can complement control by P. pseudoannulata and serve as intraguild prey for the latter species.
Combining 1,4-dimethoxybenzene, the major flower volatile of wild strawberry Fragaria vesca, with the aggregation pheromone of the strawberry blossom weevil Anthonomus rubi improves attraction
- A. Wibe, A. Borg-Karlson, L. Sigsgaard
- Biology
- 1 October 2014
Egg cannibalism in Helicoverpa armigera on sorghum and pigeonpea
- L. Sigsgaard, M. Greenstone, S. Duffield
- BiologyBioControl (Dordrecht)
- 1 April 2002
Immunoassay with an anti-vitellinmonoclonal antibody showed that egg cannibalismoccurs on pigeonpea under field conditions, which may make a significant contribution to H. armigera populationsuppression.
Cage experiments on Orius tantillus predation of Helicoverpa armigera
- L. Sigsgaard, P. Esbjerg
- Biology
- 1 March 1997
The results indicate that O. tantillus could be an important predator of early stages of an H. armigera infestation, particularly in sorghum, as well as on pigeonpea, where it was a significantly more efficient predator.
Managing Floral Resources in Apple Orchards for Pest Control: Ideas, Experiences and Future Directions
- A. Herz, F. Cahenzli, S. Penvern, L. Pfiffner, M. Tasin, L. Sigsgaard
- Biology, MedicineInsects
- 1 August 2019
A careful selection and management of plants with particular traits exploitable by most natural enemies emerged as a key-point for success and the elaborated design of such measures needs to be adopted by stakeholders and policy makers to encourage farmers to implement these measures in their orchards.
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