Publikationen - Mitarbeiter: Westerman, P

88. Hahn, Juliane; Westerman, Paula; Gerowitt, Bärbel; Heiermann, Monika: Mesophilic, Anaerobic Digestion in a Full-Scale, Commercial Biogas Reactor Kills Seeds More Efficiently than Lab-Scale Systems. In: Fermentation. 2023, Nr. 9, S. 1 - 19.
87. Hahn, J.; Westerman, P. R.; de Mol, F.; Heiermann, M.; Gerowitt, B.: Viability of Wildflower Seeds After Mesophilic Anaerobic Digestion in Lab-Scale Biogas Reactors. In: Frontiers in Plant Science. 2022, Nr. 13, S. 942346.
86. Selig, C.; de Mol, F.; Westerman, P. R.; Gerowitt, B.: Quantifying seed and establishment limitation to seedling recruitment of arable weeds: an example of barnyardgrass (Echinochloa crus-galli). In: Weed Science. 2022, Nr. 70, S. 87 - 94.
85. Pannwitt, Heike; Westerman, Paula R.; de Mol, Friederike; Gerowitt, Bärbel: Demographic processes allow Echinochloa crus-galli to compensate seed losses by seed predation. In: Agronomy. 2021, Nr. 11, 565, S. 1 - 13.
84. Pannwitt, Heike; Westerman, Paula Renate; de Mol, Friederike; Gerowitt, Bärbel: Using panicle dry weight to estimate seed production in Echinochloa crus-galli. In: Weed Research. 2019, Nr. 59, S. 437 - 445.
83. Hahn, Juliane; Müller, Jürgen; Westerman, Paula; Gerowitt, Bärbel: Weed and wildflower seeds in biogas plants - inactivation of seeds during ensiling. In: Botanikertagung 2019. , 2019. , S. 71.
82. Hahn, J.; Müller, J.; Westerman, P. R.; Gerowitt, B.: Weed and wildflower seeds in biogas plants – inactivation of seeds during ensiling. In: Deutsche Botanische Gesellschaft (Hrsg.): International Plant Science Conference : Book of Abstracts. , 2019. , S. 71 - 71.
81. de Mol, Friederike; Ladwig, Wencke; Westerman, Paula: Interactions between granivorous and carnivorous carabids affect weed seed predation. In: IOBC-WPRS Bulletin, Landscape Management for Functional Biodiversity. 143. , 2019. - ISBN 978-92-9067-328-6, S. 85 - 89.
80. Pannwitt, Heike; Westerman, Paula R.; Gerowitt, Bärbel: Post-dispersal seed predation can limit the number of seedlings of Echinochloa crus-galli. In: IOBC-WPRS Bulletin, Landscape Management for Functional Biodiversity. 143. , 2019. - ISBN 978-92-9067-328-6, S. 95 - 98.
79. Hahn, Juliane; Westerman, Paula R.; Heiermann, Monika; Gerowitt, Bärbel: Survival of wildflower seeds at 42°C as proxy for survival probability in biogas reactors. In: Book of Abstracts — 18th European Weed Research Society Symposium. , 2018. , S. 137.
78. Hahn, Juliane; Parzych, David; Schulz, Julia; Westerman, Paula R.; Gerowitt, Bärbel: Wildpflanzen-Samen in der Biogas-Anlage: Screening des Überlebensrisikos verschiedener Arten. In: Henning Nordmeyer; Lena Ulber (Hrsg.): Julius-Kühn-Archiv. 458. , 2018. - ISBN 978-3-95547-054-8 / 1868-9892, S. 41 - 46.
77. Gerowitt, B.; Barberi, P.; Darmency, H; Petit, S.; Storkey, J.; Westerman, P.: Weeds and Biodiversity. In: Hatcher, P.E.; Froud-Williams, R.J. (Hrsg.): Weed Research – Expanding Horizons. : Wiley-Publisher, 2017. - ISBN 978-1-119-96914-3, S. 115 - 146.
76. Pannwitt, Heike; Westerman, Paula Renate; de Mol, Friederike; Selig, Christian; Gerowitt, Bärbel: Biological control of weed patches by seed predators; responses to seed density and exposure time. In: Biological Control. 2017, Nr. 108, S. 1 - 8.
75. Blaix, C; Dostatny, D F; Izquierdo, J; Le Corff, J; Morrison, J; Redwitz, C von; Schumacher, M; Westerman, P; Moonen, A C: Weeds and Ecosystem services: a systematic review in arable crops. In: Proceedings of 6th workshop of the EWRS working group Weeds and Biodiversity. , 2016. , S. 35.
74. Pannwitt, Heike; Selig, Christian; Westerman, Paula Renate; Gerowitt, Bärbel: Samenfraß bei Ackerunkräutern - Ein Beitrag zur Selbstregulation?. In: Julius-Kühn-Archiv. 454. , 2016. - ISBN 978-3-95547-035-7, S. 184.
73. Hillenberg, Ann-Christin; Westerman, Paula Renate; Hirthe, Gunnar; Katroschan, Kai-Uwe: Untersaaten im ökologischen Rosenkohlanbau: Regulierungspotential gegenüber der Kohlmottenschildlaus (Aleyrodes proletella), pflanzliche Konkurrenz und Ertragswirkung. In: Julius-Kühn-Archiv. 454. , 2016. - ISBN 978-3-95547-035-7, S. 260 - 261.
72. Hahn, Juliane; Westerman, Paula R; Heiermann, Monika; Gerowitt, Bärbel: Survival of seeds from species of a wild-fl owering mixture in ensiling, anaerobic mesophilic digestion and storage of digestate at laboratory scale. In: Proceedings of the 7th International Weed Science Congress. , 2016. - ISBN 978-80-213-2648-4, S. 247.
71. Westerman, Paula R.; Hemerik, Lia; Werf, Wopke van der; Stomph, Tjeerd-Jan; Mourik, Tom van: Density-dependent population regulation in the hemi-parasite, Striga hermonthica, on sorghum. In: Proceedings of the 7th International Weed Science Congress. , 2016. - ISBN 978-80-213-2648-4, S. 219.
70. Westerman, Paula R.; Hemerik, Lia; Werf, Wopke van der; Stomph, Tjeerd-Jan; Mourik, Tom A. van: Konkurrenz in Populationen der hemiparasitären Pflanze Striga hermonthica auf dem Wirt Sorghum. In: Julius-Kühn-Archiv. 452. , 2016. - ISBN 978-3-95547-028-9, S. 100 - 102.
69. Hahn, Juliane; Parzych, David; Westerman, Paula R.; Heiermann, Monika; Gerowitt, Bärbel: Die Bedeutung der Temperatur für die Inaktivierung von Samen im Biogas-Reaktor. In: Julius-Kühn-Archiv. 452. , 2016. - ISBN 978-3-95547-028-9, S. 123 - 129.
68. Torra, J.; Atanackovic, V.; Blanco-Moreno, J.; Royo-Esnal, A.; Westerman, P.R.: Effect of weed patch size on seed removal by harvester ants. In: Weed Research. 2016, Nr. 56, S. 14 - 21.
67. Schuldreich, A.C.; Katroschan, K.U.; Westerman, P.R.; Hirthe, G.: Challenges and successes in predicting local migration dynamics of cabbage whitefly Aleyrodes proletella - a preliminary evaluation. In: Abstract IOBC/WPRS Working Group “Integrated Protection in Field Vegetables”, 04-07 October 2015 Hamburg, Germany: Abstract IOBC/WPRS Working Group “Integrated Protection in Field Vegetables”, 04-07 October 2015 Hamburg, Germany. . , S. x - y.
66. Westerman, P.R.: Functional biodiversity for sustainable weed management: Case studies and opportunities. In: Rao, A.N.; Yaduraju, N.T.Indian Society of Weed Science (Hrsg.): Weed science for sustainable agriculture, environment and biodiversity : Proceedings of the plenary and lead papers of the 25th Asian-Pacific Weed Science Society Conference, Hyderabad, India. Vol. 1. Hyderabad, 2015. - ISBN 13-978-81-931978-1-3, S. 49 - 60.
65. Schuldreich, A-C; Katroschan, K-U; Westerman, P R; Hirthe, G: First results of monitoring local migration dynamics of cabbage whitefly (Aleyrodes proletella) in winter oilseed rape fields. In: Abstractbook IPPC Berlin 2015. , 2015. , S. 672.
64. Hahn, J.; Westerman, P.R.; Heiermann, M.; Gerowitt, B.: Überleben von Wildpflanzensamen aus Blühmischungen in der anaeroben Vergärung der Biogas-Prozesskette. In: Gers-Grapperhaus, C.; Gruber, W.; Keymer, U.; Krautkremer, B.; Liebetrau, J.; Linke, B.; Oechsner, H.; Paterson, M.; Reinhold, G.; Riesel, D.; Schüsseler, P. ; Kuratorium für Technik und Bauwesen in der Landwirtschaft e.V. (KTBL) (Hrsg.): Tagungsband FNR/ KTBL-Biogaskongress ‘Biogas in der Landwirtschaft – Stand und Perspektiven‘. , 2015. - ISBN 978-3-945088-07-4, S. 438 - 439.
63. Pannwitt, H; Selig, C; de Mol, F; Westerman, P R: Biological control of weeds in maize using seed predators. In: Abstractbook IPPC Berlin 2015. , 2015. , S. 48.
62. Pannwitt, H; Selig, C; Westerman, P R; Gerowitt, B: Density-dependent seed predation in maize monoculture. In: Proceedings of the 17th EWRS-Symposium. , 2015. , S. 127.
61. Selig, C; Pannwitt, H; Westerman, P R; Gerowitt, B: Estimation of the degree of seed limitation in a weed population in maize and the importance of weed seed predation. In: Proceedings of the 17th EWRS-Symposium. , 2015. , S. 140.
60. Pannwitt, Heike; Selig, Christian; Westerman, Paula: The effect of post-dispersal seed predation on weed population dynamics of Echinochloa crus-galli in maize monoculture. In: Julius-Kühn-Archiv. 447. , 2014. , S. 553.
59. Selig, C.; Pannwitt, H.; Westerman, P.R.: The impact of functional biodiversity on arable weeds; determining the degree of seed limitation. In: Abstract 44th annual meeting of the ecological society of Germany, Austria and Switzerland, 8-12 September 2014 Hildesheim, Germany, poster 2-P1: Abstract 44th annual meeting of the ecological society of Germany, Austria and Switzerland, 8-12 September 2014 Hildesheim, Germany, poster 2-P1. , 2014.
58. Westerman, P.R.: Maintaining granivores in agroecosystems for biological weed control. In: Abstract 44th annual meeting of the ecological society of Germany, Austria and Switzerland, 8-12 September 2014 Hildesheim, Germany, 2-08: Abstract 44th annual meeting of the ecological society of Germany, Austria and Switzerland, 8-12 September 2014 Hildesheim, Germany, 2-08. , 2014.
57. Pannwitt, H.; Selig, C.; Westerman, P.R.: The importance of post-dispersal seed predation in the population dynamics of the weed Echinochloa crus-galli in maize. In: Abstract 44th annual meeting of the ecological society of Germany, Austria and Switzerland, 8-12 September 2014 Hildesheim, Germany, poster 2-P2.: Abstract 44th annual meeting of the ecological society of Germany, Austria and Switzerland, 8-12 September 2014 Hildesheim, Germany, poster 2-P2.. , 2014.
56. Westerman, Paula R.; Gerowitt, Bärbel: Die meisten Samen sterben ab. In: Landwirtschaft ohne Pflug. Juni 2014 2014, S. 30 - 34.
55. Westerman, Paula R.; Pannwitt, Heike ; Selig, Christian; de Mol, Friederike; Gerowitt, Bärbel: Testing for the weed control potential of seed predators in agroecosystems. In: IOBC-WPRS Bulletin, Landscape Management for Functional Biodiversity. 100 2014, S. 143 - 146.
54. Westerman, Paula R.; Atanackovic, Valentina; Torra, Joel: Effect of patch size on seed removal by harvester ants. In: Julius-Kühn-Archiv. 443. , 2014. , S. 451 - 455.
53. de Mol, Friederike; Ladwig, Wenke; Westerman, Paula R.: Prädation von Unkrautsamen durch samenfressende Carabiden unter dem Einfluss karnivorer Carabiden. In: Julius-Kühn-Archiv. 443. , 2014. , S. 475 - 482.
52. Daedlow, D.; Westerman, P.R.; Baraibar,B.; Rouphael, S.; Gerowitt, B.: Weed seed predation rate in cereals as a function of seed density and patch size, under high predation pressure by rodents. In: Weed Research. 2014, Nr. 54, S. 186 - 195.
51. Liebman, M.; Miller, Z.J.; Williams, C.L.; Westerman, P.R.; Dixon, P.M.; Heggenstaller, A.; Davis, A.S.; Menalled, F.D.; Sundberg, D.N.: Fates of Setaria faberi and Abutilon theophrasti seeds in three crop rotation systems. In: Weed Research. 2014, Nr. 54, S. 293 - 306.
50. Blanco-Moreno, J.M.; Westerman, P.R.; Atanackovic, V.; Torra, J.: Weed seed predation rate in cereals as a function of seed density and patch size, under high predation pressure by rodents. In: Insectes Sociaux., Nr. 61, S. 145 - 152.
49. Westerman, P.R.; Gerowitt, B.: Wenige Samen überleben. In: Dlz Agrarmagazin. 2013, Nr. November, S. 116 - 119.
48. Westerman, P.R.; Gerowitt, B.: The effect of anaerobic digestion in experimental and commercial biogas reactors on seed survival. In: Proceedings 16th Symposium of EWRS. , 2013. , S. 41.
47. Daedlow, D.; Westerman, P.R.; Gerowitt, B.: Weed seed predation in cereals as influenced by density and farming system. In: Proceedings 16th Symposium of EWRS. , 2013. , S. 118.
46. Westerman, Paula R.; Gerowitt, Bärbel: Weed seed survival during anaerobic digestion in biogas plants. In: The Botanical Review. 79 2013, Nr. 3, S. 281 - 316.
45. Deadlow, D.; Westerman, P.R.; Gerowitt, B.: Weed seed predation in cereals as influenced by density and farming system. In: DGaaE-Nachrichten. 27. , 2013.
44. Atanackovic, V.; Torra, J.; Baraibar, B.; Westerman, P.R. : Effect of density dependence on seed predation in dryland cereals. In: XIV Simpozijum o zaštiti bilja i IX Kongres o korovima (XIV Symposium on Plant Protection and IX Congress on weeds), Zlatibor, Serbia, 26 - 30 November 2012: XIV Simpozijum o zaštiti bilja i IX Kongres o korovima (XIV Symposium on Plant Protection and IX Congress on weeds), Zlatibor, Serbia, 26 - 30 November 2012. , 2012. , S. 152 - 152.
43. Daedlow, D.; Westerman, P.R.; Gerowitt, B.: Fraßraten von Unkrautsamen im Getreide unter dem Einfluss von Samendichte und Bewirtschaftung. In: Julius-Kühn-Archiv. 438. , 2012. , S. 316 - 316.
42. Daedlow, D.; Westerman, P.R.; Gerowitt, B.: An attempt to identify the factors influencing weed seed predation in an area with large field sizes. In: IOBC/WPRS Bulletin. 2012, Nr. 75, S. 61 - 64.
41. Westerman, P. R.; Gerowitt, B.: Überlebensrate von Unkrautsamen nach der Vergärung in Versuchs- und Kommerziellen Biogasanlagen. In: Julius-Kühn-Archiv. 438. , 2012. , S. 62 - 63.
40. Westerman, P. R.; Gerowitt, B.: Unkrautbekämpfung durch Samenprädatoren. In: Julius-Kühn-Archiv. 438. , 2012. , S. 315 - 315.
39. Westerman, P.R.; Hildebrandt, F.; Gerowitt, B.: Weed seed survival following ensiling and mesophilic anaerobic digestion in batch reactors. In: Weed Research. 52 2012, S. 286 - 295.
38. Westerman, P.R.; Gerowitt, B.: The probability of maize biomass contamination with weed seeds. In: Journal of Plant Diseases and Protection. 119 2012, S. 68 - 73.
37. Westerman, P.R.; Heiermann, M.; Pottberg, U.; Rodemann, B.; Gerowitt, B.: Weed seed survival during mesophilic anaerobic digestion in biogas plants. In: Weed Research. 52, S. 307 - 316.
36. Westerman, P.R.; Atanackovic, V.; Royo-Esnal A.; Torra, J.: Differential weed seed removal in dryland cereals. In: Arthropod-Plant Interactions. 6, S. 591 - 599.
35. Westerman, P.R., Diesterheft, J., Gerowitt, B.: Phenology of velvetleaf (Abutilon theophrasti Medic.) populations grown in northern Germany. In: Nordmeyer, H., Ulber, L.Julius Kühn-Institut (Hrsg.): Proceedings of the 25th German Conference on Weed Biolog and Weed Control, March 13-15, 2012, Braunschweig, Germany : Julius Kühn Archiv 434. 2. , 2012. , S. 595 - 600.
34. Daedlow, D.; Sommer, T.; Westerman, P.R.: Weed seed predation in organic and conventional cereal fields. In: AnonymusJulius Kühn Institut (Hrsg.): Proc. of 25th German Conference on Weed Biology and Weed Control, 13 – 15 March 2012, Braunschweig, Germany. , 2012.
33. Baraibar, B.; Torra, J.: Westerman, P.R.: Harvester ant (Messor barbarus (L.)) density as related to soil properties, topography and management in semi-arid cereals.. In: Applied Soil Ecology. 2011, Nr. 51, S. 60 - 65.
32. Weed Science Society of America (WSSA) annual meeting (Denver, Colorado, 7-11 February 2010). 49. , 2010.
31. Davis, A.S.; Daedlow, D.; Schutte, B.J.; Westerman, P.R.: Temporal scaling of episodic point estimates of seed predation to long-term predation rates. In: Methods in Ecology and Evolution. 2011, Nr. 2 (6), S. 682 - 690.
30. Baraibar, B.; Ledesma, R.; Royo-Esnal, A.; Westerman, P.R.: Assessing yield losses caused by granivorous ants, Messor barbarus L., in winter cereals. In: Crop Protection. 2011, Nr. 30, S. 1144 - 1148.
29. Baraibar, B.; Carrión, E; Recasens J.; Westerman, P.R.: Unravelling the process of weed seed predation; seed cache finding, seed utilization and seed preference. In: Biological Control. 56 2011, S. 85 - 90.
28. Westerman, P.R.; Luijendijk, C.D.; Wevers, J.D.A.; Werf, W. van der: Weed seed predation in a phenotypically late crop. In: Weed Research. 2011, Nr. 51, S. 157 - 164.
27. Westerman, P.R.; Hildebrandt, F.; Xamaní Montserrat, P.; Struck, C.; Gerowitt, B., 2010: Weed seed survival after silage and fermentation. In: 57th Deutsche Pflanzenschutztagung: Kurzfassung der Beitrage - 57th Deutsche Pflanzenschutztagung. , 2010. , S. 330 - 331.
26. Bandte, M.; Müller, P.; Rodemann, B.; Pietsch, M.; Westerman, P.R.; Gerowitt, B.; Plöchl,M.; Heiermann, M.; Büttner, C., 2010: Zum phytosanitären Risiko bei der anaeroben Vergärung von pflanzlichen Biomassen in Biogasanlagen – ein Verbundprojekt. In: 57th Deutsche Pflanzenschutztagung: Kurzfassungen der Beiträge - 57th Deutsche Pflanzenschutztagung. , 2010. , S. 513 - 513.
25. Atanackovic, V.; Westerman, P.R.; Torra, J.; Royo, A. 2010: Can weed seeds avoid predation by harvester ants?. In: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010. , 2010. , S. 161 - 161.
24. Schwalm, M.; Daedlow, D.; Westerman, P.R.; Mol, F. de, 2010: Weed seed predation as influenced by tillage. In: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010. , 2010. , S. 169 - 169.
23. Baraibar, B., Torra, J., Westerman, P.R. 2010: Soil characteristics influence granivorous ant populations in dryland cereals. In: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010. , 2010. , S. 172 - 172.
22. Westerman, P.R.; Luijendijk, C.D.; Wevers, J.D.A..; Werf, W. van der. 2010: Weed seed predation in sugarbeet. In: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010. , 2010. , S. 165 - 165.
21. Westerman, P.R.; Borza, J.K.; Liebman, M.; Dixon P.M. 2010: Weed seed burial rate as affected by seed size and crop environment, and consequences for predation risk. In: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010: Proc. of the 15th Symposium of the European Weed Research Society, Kaposvár, Hungary, 12-15 July 2010. , 2010. , S. 153 - 153.
20. Chauhan, B.S.; Migo, T.; Westerman, P.R.; Johnson, D.E.: Post-dispersal predation of weed seeds in rice fields. In: Weed Research. 50 2010, Nr. 6, S. 553 - 560.
19. Westerman, P.R.; Baraibar, B.; Deadlow, D.; Liebman, M., 2010.: Managing weed seed predation in arable fields. In: IOBC/WPRS Bulletin. 56 2010, S. 143 - 146.
18. Daedlow, D.; Baraibar, B.; Westerman, P.R.; de Mol, F.: Comparing methods to measure the effect of weed seed densities on seed predation rates in cereals. In: University of Lleida, Spain: Proceedings of the 3rd Workshop of the EWRS Working Group ‘Weeds and Biodiversity’. , 2009. , S. 56 - 56.
17. Westerman, P.R.; Borza, J.K.; Andjelkovic, J.; Liebman, M.; Danielson, B.: Density-dependent predation of weed seeds in Iowa corn field. In: University of Lleida ; University of Lleida (Hrsg.): Proceeding of the 3rd Workshop of the EWRS Working Group 'Weeds and Biodiversity'. , 2009. , S. 54 - 54.
16. Williams, C. L.; Liebman, M.; Westerman, P.R.; Borza, J.; Sundberg, D.; Danielson B.: Over-winter predation of Abutilon theophrasti and Setaria faberi seeds in arable land. In: University of Lleida, Spain: Proceedings of the 3rd Workshop of the EWRS Working Group ‘Weeds and Biodiversity’. , 2009. , S. 52 - 52.
15. Baraibar, B.; Westerman, P.R.; Carrión, E.; Recasens, J.: Effects of tillage and irrigation in cereal fields on weed seed removal by seed predators. In: University of Lleida, Spain: Proceedings of the 3rd Workshop of the EWRS Working Group ‘Weeds and Biodiversity’. , 2009. , S. 49 - 49.
14. Williams, C.L.; Liebman, M.; Westerman, P.R.; Borza, J.; Sundberg, D.; Danielson, B.: Over-winter predation of Abutilon theophrasti and Setaria faberi seeds in arable land. In: Weed Research. 49 2009, S. 439 - 447.
13. Westerman, P.R.; Dixon, P.M.; Liebman, M.: Burial rate of surrogate seed in arable fields. In: Weed Research. 49 2009, S. 142 - 152.
12. Baraibar, B.; Westerman, P.R.; Carrión, E; Recasens J.: Effects of irrigation and tillage in cereal fields on weed seed removal by predators. In: Journal of Applied Ecology. 46 2009, S. 380 - 387.
11. Saska, P.; Werf, W. van der; Vries, E de; Westerman, P.R.: Spatial and temporal patterns of carabid activity-density in cereals do not explain levels of predation on weed seeds.. In: Bulletin of Entomological Research. 89 2008, S. 169 - 181.
10. Liebman, M.; Gibson, L.R.; Sundberg, D.N.; Heggenstaller, A.H.; Westerman, P.R.; Chase, C.A.; Hartzler, R.G.; Menalled, F.D.; Davis, A.S.; Dixon P.M.: Agronomic and economic performance characteristics of conventional and low-external-input cropping systems in the central corn belt.. In: Agronomy Journal 100, 600-610. 100 2008, S. 600 - 610.
9. Westerman, P.R.; Borza, J.K.; Andjelkovic, J.; Liebman, M.;Danielson, D.: Density-dependent predation of weed seeds in Iowa maize fields. In: Journal of Applied Ecology. 45 2008, S. 1612 - 1620.
8. Westerman, P.R.; Ast, A. van; Stomph, T.J.; Werf, W. van der: Long term population dynamics of the parasitic weed Striga hermonthica: Strategy evaluation with a population model. In: Crop Protection. 26 2007, S. 219 - 227.
7. Saska, P.; Vodde, M; Heijerman, T.; Westerman, P.R.; Werf, W. Van der: The significance of a grassy field boundary for the spatial distribution of carabids within two cereal fields. In: Agriculture, Ecosystems & Environment. 122 2007, S. 427 - 434.
6. Westerman, P.R.; Liebman, M.; Heggenstaller, A.H.; Forcella, F.: Integrating measurements of seed availability and removal to estimate weed seed losses due to predation. In: Weed Science. 54 2006, S. 566 - 574.
5. Heggenstaller, A.H.; Menalled, F.D.; Liebman, M.; Westerman, P.R.: Seasonal patterns in post-dispersal seed predation of Abutilon theophrasti and Setaria faberi in three cropping systems. In: Journal of Applied Ecology. 43 2006, S. 999 - 1010.
4. Marino, P.C.; Westerman, P.R.; Pinkert, C.; Werf, W. van der: Influence of seed density and aggregation on post-dispersal weed seed predation in cereal fields.. In: Agriculture, Ecosystems & Environment. 106 2005, S. 17 - 25.
3. Westerman, P.R.; Liebman, M.; Menalled, F.D.; Heggenstaller, A.H.; Hartzler. R.G.; Dixon, P.M.: Are many little hammers effective? Velvetleaf population dynamics in two- and four-year crop rotation systems. In: Weed Science. 53 2005, S. 382 - 392.
2. Westerman, P.R.; Wes,J.S. Kropff; M.J., Werf; W. van der: Annual losses of weed seeds due to predation in organic cereal fields. In: Journal of Applied Ecology. 40 2003, S. 824 - 836.
1. Westerman, P.R., Hofman, A.; Vet, L.E.M.;van der Werf, W.: Relative importance of vertebrates and invertebrates in epigeaic weed seed predation in organic cereal fields. In: Agriculture, Ecosystems & Environment. 95 2003, S. 417 - 425.