Lene Sigsgaard

• Agricultural entomology
• Biological control
• Integrated pest management
• Predator-prey interactions
• Functional agrobiodiversity
• Insect ecology
• tri-trophic interactions

Liste med publikasjoner fra min forskning. (Cristin)

1.       Bick E, Sigsgaard L, Torrance MT, Helmreich S, Still L, Beck B, El Rashid R, Lemmich J, Nikolajsen T, Cook SM. 2023. Dynamics of pollen beetle (Brassicogethes aeneus) immigration and colonization of oilseed rape (Brassica napus) in Europe. Pest Manag Sci. 2023 May 14. doi: 10.1002/ps.7538. Epub ahead of print. PMID: 37183217.

2.       Gamonal Gomez, N., Sørensen, D. H., Chua, P. Y. S., & Sigsgaard, L. 2023. Assessing flower-visiting arthropod diversity in apple orchards through metabarcoding of environmental DNA from flowers and visual census. Environmental DNA, 5, 117– 131. https://doi.org/10.1002/edn3.362

3.       Musaqaf, N., Jørgensen, H.J.L., Sigsgaard, L. 2023. Plant resistance induced by hemipterans —Effects on insect herbivores and pathogens. Crop Protection 163, https://doi.org/10.1016/j.cropro.2022.106122

4.       López Carretero, L., Pekas, A., Stubsgaard, L., Sancho Blanco, G., Lütken, H., Sigsgaard, L. 2022. Glandular trichomes affect mobility and predatory behavior of two aphid predators on medicinal cannabis, Biological Control 170, 104932, https://doi.org/10.1016/j.biocontrol.2022.104932

5.       Musaqaf N, Sigsgaard L, Markussen B, Stenberg JA. 2022. Effects of strawberry resistance and genotypic diversity on aphids and their natural enemies. Biological Control 170, 104919,

https://doi.org/10.1016/j.biocontrol.2022.104919

6.       Jacobsen, SK, Sørensen, H., Sigsgaard, L. 2022. Perennial flower strips in apple orchards promote natural enemies in their proximity. Crop Protection 156. https://doi.org/10.1016/j.cropro.2022.105962

7.       Jacobsen SK, Sigsgaard L., Johansen AB, Thorup-Kristensen K, Jensen PM. 2022. The impact of reduced tillage and distance to field margin on predator functional diversity. Journal of Insect Conservation 26, 491-501. https://doi.org/10.1007/s10841-022-00370-x

8.       Olvera-Vazquez S.G;  Remoué C., Venon A., Rousselet A., Grandcolas O., Azrine M., Momont L., Galan M., Benoit L., David G. M., Alhmedi A., Beliën T., Alins G., Franck P., Haddioui A., Jacobsen S.K., Andreev R., Simon S., Sigsgaard L. , Guibert E., Tournant L., Gazel F., Mody K., Khachtib Y. , Roman A., Ursu T.M., Zakharov I.A. , Belcram H., Harry M., Roth M., Simon J.C., Oram S., Ricard J.M., Agnello A., Beers E. H., Engelman J., Balti I., Salhi-Hannachi A., Zhang H., Tu H. , Mottet C., Barrès B., Degrave A., Razmjou J. , Giraud T., Falque M., Dapena E., Miñarro, M., Jardillier L., Deschamps P., Jousselin E., Cornille, 2021. A. Large-scale geography survey provides insights into the colonization history of a major aphid pest on its cultivated apple host in Europe, North America and North Africa. PCI Evol. Ecol.   https://doi.org/10.24072/pcjournal.26

9.       Lalyer, C.R., Sigsgaard, L., Giese, B. 2021. Ecological vulnerability analysis for suppression of Drosophila suzukii by gene drives. Global Ecology and Conservation, Volume 32. https://www.sciencedirect.com/science/article/pii/S2351989421004339

10.   Cardona, A., Tchamitchian, M., Penvern, S., Dufils, A., Jacobsen, S. K., Korsgaard, M., Porcel, M., Świergiel, W., Tasin, M., Warlop, F., Sigsgaard, L. 2021. Monitoring methods adapted to different perceptions and uses of functional biodiversity: Insights from a European qualitative study. Ecological Indicators, 129, 107883. https://doi.org/10.1016/j.ecolind.2021.107883

11.   Holm, L.L., He, X., Sigsgaard, L. (2021), Flower diet enhances Adalia bipunctata larval development significantly when prey is limited. Entomol Exp Appl, 169: 750-757. https://doi.org/10.1111/eea.13068

12.   Nielsen H, Sigsgaard L, Kobro S, Jensen NL, Jacobsen SK. 2021. Species Composition of Thrips (Thysanoptera: Thripidae) in Strawberry High Tunnels in Denmark. Insects 12(3):208. https://doi.org/10.3390/insects12030208

13.   He X., Kiær LS, Jensen PM, Sigsgaard L. 2021. The effect of floral resources on predator longevity and fecundity: A systematic review and meta-analysis. Biological Control 153, 104476 https://doi.org/10.1016/j.biocontrol.2020.104476

14.   Borbély C, György Z, Jacobsen SK, Musa F, Ouředníčková J, Sigsgaard L, Skalský M, Markó V. 2021. First records of the invasive aphid species, Aphis spiraecola, in Kosovo, Slovakia, the Czech Republic, the United Kingdom and Denmark. Plant Protection Science 57,1, 70-74 https://doi.org/10.17221/108/2020-PPS

15.   Mozūraitis, R., Hall, D., Trandem, N., Ralle, B., Tunström, K., Sigsgaard, L., Baroffio, C., Fountain, M., Cross, J., Wibe, A., Borg-Karlson, A-K. 2020. Composition of Strawberry Floral Volatiles and their Effects on Behavior of Strawberry Blossom Weevil, Anthonomus rubi. J Chem Ecol. https://doi.org/10.1007/s10886-020-01221-2

16.   Steinwender B.M., Sigsgaard L., Jacobsen S.K., Eilenberg, J. 2020. First steps towards biological control of the pear gall midge (Contarinia pyrivora) with the insect pathogenic fungus Metarhizium brunneum. J Appl Ent. 144, 834-837. https://doi.org/10.1111/jen.12810

17.   Aregbesola O.Z, J.P. Legg, O.S. Lund, L. Sigsgaard, M. Sporleder, P. Carhuapoma , Rapisarda, C.2020. Life history and temperature-dependence of cassava-colonising populations of Bemisia tabaci (Gennadius). Journal of Pest Science 93, 1225–1241. https://doi.org/10.1007/s10340-020-01249-z

18.   Montoro M.C., De Fine Licht H., Sigsgaard L. 2020. Nutritional quality of Drosophila melanogaster as factitious prey for rearing the predatory bug Orius majusculus. Insect Science 28, 191-202. https://doi.org/10.1111/1744-7917.12758

19.   Montoro M., Jensen P.M., Sigsgaard L. 2020. Stable Isotope Enrichment (Δ15N) in the Predatory Flower Bug (Orius majusculus) Predicts Fitness-Related Differences between Diets. Insects, 11(4), p.255.  https://doi.org/10.3390/insects11040255  

20.   He X, Qiao Y, Sigsgaard L, Wu X. 2020. The spider diversity and plant hopper control potential in the long-term organic paddy fields in sub-tropical area, China. Agriculture, Ecosystems and Environment 295, 106921, 15 June 2020, https://doi.org/10.1016/j.agee.2020.106921

21.   Montoro, M. C., De Clercq, P., Overgaard, J., Sigsgaard, L. 2020. Fitness consequences of artificial diets with different macronutrient composition for the predatory bug, Orius majusculus. Entomologia Experimentalis et Applicata 168: 492-501.https://doi.org/10.1111/eea.12881

22.   Toft, S, Jensen K, Sørensen, JG, Sigsgaard, L, Holmstrup, M 2020. Food quality of Ephestia eggs, the aphid Rhopalosiphum padi and mixed diet for Orius majusculus. Journal of Applied Entomology 144, 251-262, https://doi.org/10.1111/jen.12739

23.   Jacobsen SK, Klingen I, Eilenberg J, Markussen B & Sigsgaard L. 2019. Entomopathogenic fungal conidia marginally affect the behavior of the predators Orius majusculus (Hemiptera: Anthocoridae) and Phytoseiulus persimilis (Acari: Phytoseiidae) foraging for healthy Tetranychus urticae (Acari: Tetranychidae), Experimental & Applied Acarology, 79(3-4): 299-307. https://doi.org/10.1007/s10493-019-00441-w      

24.   Jensen, K., Toft, S., Givskov Sørensen, J., Sigsgaard, L., Kristensen, T., Overgaard, J. Holmstrup, M. 2019. Prey-specific experience affects prey preference and time to kill in the soil predatory mite Gaeolaelaps aculeifer Canestrini. Biological control 139. https://doi.org/10.1016/j.biocontrol.2019.104076

25.   Herz, A., Cahenzli, F., Penvern, S., Pfiffner, L., Tasin, M., Sigsgaard, L. 2019. Managing Floral Resources in Apple Orchards for Pest Control: Ideas, Experiences and Future Directions. Insects, 10(8), 247. https://doi.org/10.3390/insects10080247

26.   Ahrenfeldt, E. J., Sigsgaard, L., Hansted, L., Jensen, A. C. and Toldam‐Andersen, T. B. 2019. Forage quality and quantity affect red mason bees and honeybees differently in flowers of strawberry varieties. Ent Exp Appl. 167, 763-773. https://doi.org/10.1111/eea.12820

27.   Penvern, S., Fernique, S., Cardona, A., Herz, A., Ahrenfeldt, E.J., Dufils, A., Jamar, L., Korsgaard, M. Kruczynska, K., Matray, S. Ozolina-Pole, L., Porcel, M., Ralle, B., Steinemann, B, Swiergiel, W., Tasin, M., Telfser, J., Warlop, F., Sigsgaard, L. 2019 Farmers' management of functional biodiversity goes beyond pest management in organic European apple orchards. Agriculture, Ecosystems and Environment 284. https://doi.org/10.1016/j.agee.2019.05.014      (15 Nov 2019)

28.   Pfiffner, L, Cahenzli, F.; Steinemann, B.; Sigsgaard, L.; Bjørn, M.C.; Porcel, M.; Tasin, M.; Kelderer M.; Telfser, J.; Lisek, J.. 2019. Design, implementation and management of perennial flower strips to promote functional agrobiodiversity in organic apple orchards: a pan-European study. Agriculture, Ecosystems and Environment 278, 61-71 https://www.sciencedirect.com/science/article/pii/S0167880919300556 

29.   Cahenzli, F; Sigsgaard, L.; Daniel, C.; Herz, A.; Jamar, L.; Kelderer, M.; Jacobsen, S.K.; Kruczyńska, D.; Matray, S.; Porcel, M.; Sekrecka, M. ; Swiergiel, W.; Tasin, M.; Telfser, J.; Pfiffner, L. 2019. Perennial flower strips for pest control in organic apple orchards - A pan-European study. Agriculture, Ecosystems and Environment 278, 43-53 https://doi.org/10.1016/j.agee.2019.03.011

30.   Jacobsen, S.K., Sigsgaard, L., Hansen, K., Harwood, J., Chapman, E., Hurtado, M., Jacas, J., Jensen, A.B. 2019. Generalist predator contribution to control of T. urticae by PCR-based gut content analysis. Exp Appl Acarol 77, 133-143. https://doi.org/10.1007/s10493-019-00351-x

31.   Svensson GP, Tönnberg V, Sigsgaard L. 2019. Identification and field evaluation of (E)‐11,13‐tetradecadienal as sex pheromone of the strawberry tortrix (Acleris comariana). J Appl Entomol. 2019; 00:1–7 https://doi.org/10.1111/jen.12619

32.   Ahrenfeldt, EJ., Kollmann, J, Madsen, HB Skov-Petersen, H, Jensen, AC, Aalborg, GL, Sigsgaard, L 2019. Generalist solitary ground-nesting bees dominate diversity survey in intensively managed agricultural land. Journal of Melittology 82, 1-12 https://doi.org/10.17161/jom.v0i82.7057

33.   He, X., Sigsgaard, L. 2019. A floral diet increases the longevity of the coccinellid Adalia bipunctata but does not allow molting or reproduction. Frontiers in Ecology and Evolution 7:6. https://doi.org/10.3389/fevo.2019.00006   

34.   Azevedo, A.G.C.; Steinwender, B.M.; Eilenberg, J.; Sigsgaard, L. 2019. Non-target effects of Metarhizium brunneum (BIPESCO 5/F 52) in soil show that this fungus varies between being compatible with, or moderately harmful to, four predatory arthropods. Biological Control 131, 18-24 https://doi.org/10.1016/j.biocontrol.2019.01.002

35.   Esbjerg, P, Sigsgaard, L. 2019. Temperature dependent growth and mortality of Agrotis segetum. Insects 10(1), 7; https://doi.org/10.3390/insects10010007

36.   Jacobsen, SK, Moraes, GJ, Sørensen, H, Sigsgaard, L. 2019. Organic cropping practice decreases pest abundance and positively influences predator-prey interactions. Agriculture, Ecosystems and Environment 272, 1-9. https://doi.org/10.1016/j.agee.2018.11.004

37.   Aregbesola OZ, Legg JP, Sigsgaard L, Lund OS, Rapisarda C. 2019. Potential impact of climate change on the distribution and abundance of cassava-colonising Bemisia tabaci (Hemiptera: Aleyrodidae) in Africa. Journal of Pest Science 92, 381–392. https://doi.org/10.1007/s10340-018-1059-9 with corrigendum in https://doi.org/10.1007/s10340-018-01072-7

38.   Jensen, K; Toft, S; Sigsgaard, L; Sørensen, J; Holmstrup, M. 2018. Prey-specific impact of cold pre-exposure on kill rate and reproduction in a predatory mite. Animal Ecology https://doi.org/10.1111/1365-2656.12916

39.   Azevedo, AGC, Stewart, R, Sigsgaard, L. 2018. Presence of a generalist entomopathogenic fungus influences the oviposition behaviour of an aphid-specific predator. BioControl online 12p https://doi.org/10.1007/s10526-018-9889-1

40.   Baroffio, C, Sigsgaard, L; Ahrenfeldt, EJ; Borg-Karlson, AK; Bruun, SA; Cross, JV; Fountain, MF; Hall, DR; Mozuraitis, R; Ralle, B; Trandem, N; Wibe, A. 2018. Combining plant volatiles and pheromones to catch two insect pests in the same trap: examples from two berry crops. Crop Protection 109, 1-8. https://doi.org/10.1016/j.cropro.2018.02.025

41.   Helgadottir, F., Toft, S., Sigsgaard, L. 2017. Negative effects of low developmental temperatures on aphid predation by Orius majusculus (Heteroptera: Anthocoridae). Biological Control 114, 59-64 https://doi.org/10.1016/j.biocontrol.2017.08.002

42.   Fountain, M.; Baroffio, C.; Borg-Karlson, A-K; Brain, P.; Cross, JV; Farman, DI; Hall, DR; Ralle, B; Rendina, P; Richoz, P; Sigsgaard, L; Storberget, S; Wibe, A. 2017. Design and deployment of semiochemical traps for capturing Anthonomus rubi Herbst (Coleoptera: Curculionidae) and Lygus rugulipennis Poppius (Hetereoptera: Miridae) in soft fruit crops. Crop Protection 99, 1-9. https://doi.org/10.1016/j.cropro.2017.05.001

43.   Azevedo, A.G.C.; Steinwender, B.M.; Eilenberg, J.; Sigsgaard, L. 2017. Interactions among the Predatory Midge Aphidoletes aphidimyza (Diptera: Cecidomyiidae), the Fungal Pathogen Metarhizium brunneum (Ascomycota: Hypocreales), and Maize-Infesting Aphids in Greenhouse Mesocosms. Insects 8, 44. http://www.mdpi.com/2075-4450/8/2/44  doi:10.3390/insects8020044  (publ 12 April 2017, 12 pages)

44.   Sigsgaard, L.; Herz, A.; Korsgaard, M.; Wührer, B. 2017. Mass Release of Trichogramma evanescens and T. cacoeciae Can Reduce Damage by the Apple Codling Moth Cydia pomonella in Organic Orchards under Pheromone Disruption. Insects 8, 41. https://doi.org/10.3390/insects8020041  (publ 4 Apr 17, 9 p)

45.   Rauch, H., Steinwender, B.M., Mayerhofer, J., Sigsgaard, L., Eilenberg, J., Enkerli, J., Zelger, R, Strasser, H. 2017. Field efficacy of Heterorhabditis bacteriophora (Nematoda:Heterorhabditidae), Metarhizium brunneum (Hypocreales:Clavicipitaceae), and chemical insecticide combinations for Diabrotica virgifera virgifera larval management. Biological Control 107, 1-10. https://doi.org/10.1016/j.biocontrol.2017.01.007

46.   Kabi, S., Karungi, J., Sigsgaard, L., Ssebuliba, J.M., 2016. Dysmicoccus brevipes (Cockerell) occurrence and infestation behaviour as influenced by farm type, cropping systems and soil management practices. Agriculture, Ecosystems & Environment, 222, pp. 23-29.        doi:10.1016/j.agee.2016.01.040  

47.   Jacobsen, S. K., Alexakis, I. Sigsgaard, L. 2016. Antipredator responses in Tetranychus urticae differ with predator specialization. Journal of Applied Entomology, 140: 228-231. http://onlinelibrary.wiley.com/doi/10.1111/jen.12275/abstract doi: 10.1111/jen.12275

48.   Navntoft, S., Kristensen, K., Johnsen, I., Jensen, A.-M. M., Sigsgaard, L., Esbjerg, P. 2016. Effects of weed harrowing frequency on beneficial arthropods, plants and crop yield. Agricultural and Forest Entomology, 18: 59-67. doi: 10.1111/afe.12134

49.   Gacheri, C., Kigen, T., Sigsgaard, L. 2015. Hot-spot application of biocontrol agents to replace pesticides in large scale commercial rose farms in Kenya. BioControl 60, 795-803, http://link.springer.com/article/10.1007%2Fs10526-015-9685-0 DOI: 10.1007/s10526-015-9685-0

50.   Ahrenfeldt, EJ, Klatt, BK, Arildsen, J, Trandem N, Andersson G, Tscharntke T, Smith HG, Sigsgaard, L. 2015. Pollinator communities in strawberry crops - variation at multiple spatial scales. Bulletin of Entomological Research 105, 497 - 506. http://dx.doi.org/10.1017/S000748531500036X

51.   Sigsgaard, L., Haukeland, S., Naulin, C., Kristensen, K., Enkegaard, A., Jensen, NL, Eilenberg J. 2014. Strawberry cropping practice effects on pests and their natural enemies. J. Insect Science, 14(122) DOI:  http://dx.doi.org/10.1673/031.014.122

52.   Wibe, A. Borg-Karlson, A.K., Cross, J., Bichão, H., Fountain, M., Liblikas, I., Sigsgaard, L. 2014. 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. Crop Protection 64, 122-128. http://www.sciencedirect.com/science/article/pii/S0261219414002014/          doi:10.1016/j.cropro.2014.06.016

53.   Esbjerg, P., Sigsgaard, L.  2014. Changing phenology and pest status of Danish Agrotis segetum related to climate change. Crop Protection 62: 64-71. https://doi.org/10.1016/j.cropro.2014.04.003

54.   Sigsgaard L, Betzer C, Naulin C, Eilenberg J, Enkegaard A, Kristensen K. 2013. The effect of floral resources on parasitoid and host longevity: Prospects for conservation biological control in strawberries. Journal of Insect Science 13:104. http://www.bioone.org/doi/abs/10.1673/031.013.10401/  doi: http://dx.doi.org/10.1673/031.013.10401  

55.   Enkegaard A, Sigsgaard L, Kristensen K. 2013. Shallot aphids, Myzus ascalonicus, in strawberry: Biocontrol potential of three predators and three parasitoids. Journal of Insect Science 13:83. Link: http://www.insectscience.org/13.83

56.   Skou, A.-M. T., Jensen, Linda A., Markussen, B., Sigsgaard, L., Kollmann, J. 2011. No evidence for enemy release during range expansion of an evergreen tree in northern Europe. Environmental Entomology. 40(5): 1183- 1191. Link: http://www.bioone.org/doi/abs/10.1603/en11063

57.   Simonsen, M.-L. R., Enkegaard, A., Bang, C. N., Sigsgaard, L. 2010. Anthocoris nemorum (Heteroptera: Anthocoridae) as predator of cabbage pests - voracity and prey preference. - Entomologica Fennica 21, 12-18. http://www.entomologicafennica.org/Volume21/abstracts21_12.htm

58.   Sigsgaard, L. 2010. Habitat and prey preferences of the two predatory bugs Anthocoris nemorum (L.) and A. nemoralis (Fabricius) (Anthocoridae: Hemiptera-Heteroptera). Biological Control 53, 46-54. http://www.sciencedirect.com/science/article/pii/S1049964409002953/  DOI:10.1016/j.biocontrol.2009.11.005

59.   Porter, J., Costanza, R., Sandhu, H., Sigsgaard, L., Wratten, S. 2009. The Value of Producing Food, Energy and Ecosystem Services within an Agro-Ecosystem".  Ambio 38, 186-193. http://www.bioone.org/doi/abs/10.1579/0044-7447-38.4.186

60.   Simonsen, M.-L. R., Enkegaard, A., Bang, C. N., Sigsgaard, L.  2009. Temperature effect on the predation rate of Anthocoris nemorum (Heteroptera: Anthocoridae) on cabbage aphids (Homoptera: Aphididae). Journal of applied entomology 133, 198-200. http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0418.2008.01327.x/abstract

61.   Sigsgaard, L., Jacobsen, S.-E. and Christiansen, J.L.  2008. Quinoa provides a new host for native herbivores in northern Europe: case studies of the moth, Scrobipalpa atriplicella, and the tortoise beetle, Cassida nebulosa. Journal of Insect Science 8, article 49 (4p). online: insectscience.org/8.49

62.   Sigsgaard, L. 2007. Early season natural control of the brown planthopper, Nilaparvata lugens: the contribution and interaction of two spider species and a predatory bug. Bull. Ent. Res. 97 533-544.  

63.   Sigsgaard, L., Esbjerg, P. and Philipsen, H. 2006a. Experimental releases of Anthocoris nemoralis F. and A. nemorum (L.) (Heteroptera: Anthocoridae) against the pear psyllid Cacopsylla pyri L. (Homoptera: Psyllidae) in pear. Biol. Control. 39: 87-95   

64.   Sigsgaard, L., Esbjerg, P. and Philipsen, H. 2006b. Controlling Pear psyllids by mass releasing Anthocoris nemoralis and A. nemorum (Heteroptera: Anthocoridae). J. Fruit Ornament. Pl. Res., 14, 89-98.

65.   Sigsgaard, L. 2005. Oviposition preference of Anthocoris nemoralis and A. nemorum (Heteroptera: Anthocoridae) on pear leaves affected by leaf damage, honeydew and prey. Biocontrol Science and Technology 15(2), 139-151. http://www.tandfonline.com/doi/abs/10.1080/09583150400016001 / DOI:     10.1080/09583150400016001

66.   Sigsgaard, L. 2004. Oviposition preference of Anthocoris nemorum and A. nemoralis (Heteroptera: Anthocoridae) for apple and pear. Entomologia Experimentalis et Applicata 111, 215-223                   

67.   Sigsgaard, L., Greenstone, M. H. and Duffield, S.J. 2002. Helicoverpa armigera egg cannibalism. Cage experiments with first instar larvae and eggs. BioControl 47, 151-165                                                   

68.   Sigsgaard, L. 2002a. A survey of aphids and aphid parasitoids in cereal fields in Denmark, and the parasitoids’ role in biological control. Journal of Applied Entomology 126, 101-107.  DOI: 10.1046/J.1439-0418.2002.00611.X                          

69.   Sigsgaard, L. 2002b. 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. In S. Toft and N. Scharff (eds.) European Arachnology 2000, (Proceedings of the 19th European Colloquium of Arachnology, Århus 17-22 July 2000, refereed by 2 referees). Aarhus University Press, Aarhus, 57-64.  DOI: 10.1017/S0007485307005196                                                  

70.   Sigsgaard, L., Toft, S.,Villareal, S. 2001a. Diet-dependent fecundity of the spiders Atypena formosana and Pardosa pseudoannulata, predators in irrigated rice. Agricultural and Forest Entomology 3, 285-295.                                                                                                             

71.   Sigsgaard, L., Villareal, S. 2001. Diurnal distribution of the money spider Atypena formosana in the rice plant, and its relation to tiller density. International Rice Research Notes 26(2) 45-47.

72.   Sigsgaard, L., Toft, S. and Villareal, S. 2001b Diet-dependent survival, development and fecundity of the spider Atypena formosana (Oi) (Araneae: Linyphiidae) - Implications for biological control in rice. Biocontrol Science and Technology 11, 233-244.                                                                              

73.   Sigsgaard, L. 2000. The temperature dependent development and parasitism of the cereal aphid parasitoids Aphidius ervi, Aphidius rhopalosiphi, and Praon volucre. Entomologia Experimentalis et Applicata 95, 173-184.  DOI: 10.1046/J.1570-7458.2000.00655.X                                                                                                                           

74.   Sigsgaard, L. and Villareal, S. 1999. Predation rates of Atypena formosana (Araneae: Linyphiidae) on brown planthopper, and green leafhopper, International Rice Research Notes 24 (3),

75.   Sigsgaard, L., Ersbøll, A.K. 1999. Effect of cowpea intersowing and insecticide application on Helicoverpa armigera and its natural enemies in a sorghum-pigeonpea intercropping system International Journal of Pest Management 45, 61-67

76.   Sigsgaard, L., Esbjerg, P. 1997. Cage experiments on Orius tantillus predation of Helicoverpa armigera. Entomologia Experimentalis et Applicata 82, 311-318.