Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Tussenevaluatie van de nota ‘Gezonde Groei, Duurzame Oogst’ : deelproject Milieu
Verschoor, A. ; Zwartkruis, J. ; Hoogsteen, M. ; Scheepmaker, J. ; Jong, F. de; Knaap, Y. van der; Leendertse, P. ; Boeke, S. ; Vijftigschild, R. ; Kruijne, R. ; Tamis, W. - \ 2019
Den Haag : Planbureau voor de Leefomgeving (RIVM rapport 2019-0044) - 167
Atmospheric CH4 in the first decade of the 21st century: Inverse modeling analysis using SCIAMACHY satellite retrievals and NOAA surface measurements
Bergamaschi, P. ; Houweling, S. ; Segers, A. ; Krol, M.C. ; Frankenberg, C. ; Scheepmaker, R.A. ; Dlugokencky, E. ; Wofsy, S.C. ; Kort, E.A. ; Sweeney, C. ; Schuck, T. ; Brenninkmeijer, C. ; Chen, H. ; Beck, V. ; Gerbig, C. - \ 2013
Journal of Geophysical Research: Atmospheres 118 (2013)13. - ISSN 2169-897X - p. 7350 - 7369.
growth-rate - methane emissions - carbon-dioxide - northern-hemisphere - data assimilation - transport model - variability - chemistry - climate - troposphere
The causes of renewed growth in the atmospheric CH4 burden since 2007 are still poorly understood and subject of intensive scientific discussion. We present a reanalysis of global CH4 emissions during the 2000s, based on the TM5-4DVAR inverse modeling system. The model is optimized using high-accuracy surface observations from NOAA ESRL's global air sampling network for 2000-2010 combined with retrievals of column-averaged CH4 mole fractions from SCIAMACHY onboard ENVISAT (starting 2003). Using climatological OH fields, derived global total emissions for 2007-2010 are 16-20 Tg CH4/yr higher compared to 2003-2005. Most of the inferred emission increase was located in the tropics (9-14 Tg CH4/yr) and mid- latitudes of the northern hemisphere (6-8 Tg CH4/yr), while no significant trend was derived for Arctic latitudes. The atmospheric increase can be attributed mainly to increased anthropogenic emissions, but the derived trend is significantly smaller than estimated in the EDGARv4.2 emission inventory. Superimposed on the increasing trend in anthropogenic CH4 emissions are significant inter-annual variations (IAV) of emissions from wetlands (up to +/- 10 Tg CH4/yr), and biomass burning (up to +/- 7 Tg CH4/yr). Sensitivity experiments, which investigated the impact of the SCIAMACHY observations (versus inversions using only surface observations), of the OH fields used, and of a priori emission inventories, resulted in differences in the detailed latitudinal attribution of CH4 emissions, but the IAV and trends aggregated over larger latitude bands were reasonably robust. All sensitivity experiments show similar performance against independent shipboard and airborne observations used for validation, except over Amazonia where satellite retrievals improved agreement with observations in the free troposphere.
Biological control of the mushroom sciarid Lycoriella auripila and the phorid Megaselia halterata by entomopathogenic nematodes
Scheepmaker, J.W.A. - \ 1999
Radboud University Nijmegen. - - 127 p.
Influence of Steinernema feltiae and diflubenzuron on the yield and economics of the cultivated mushroom Agraricus bisporus in Dutch mushroom culture
Scheepmaker, J.W.A. ; Geels, F.P. ; Smits, P.H. - \ 1998
Biocontrol Science and Technology 8 (1998). - ISSN 0958-3157 - p. 281 - 287.
Comparison of the efficacy of entomopathogenic nematodes for the biological control of the mushroom pests Lycoriella auripila (Sciaridae) and Megaselia halterata (Phoridae)
Scheepmaker, J.W.A. ; Geels, F.P. ; Rutjens, A.J. ; Smits, P.H. ; Griensven, L.J.L.D. van - \ 1998
Biocontrol Science and Technology 8 (1998). - ISSN 0958-3157 - p. 289 - 300.
Location of immature stages of the mushroom insect pest Megaselia halterata in mushroom-growing medium
Scheepmaker, J.W.A. ; Geels, F.P. ; Smits, P.H. ; Griensven, L.J.L.D. van - \ 1997
Entomologia Experimentalis et Applicata 83 (1997). - ISSN 0013-8703 - p. 323 - 327.
Experiments were conducted to examine the location of oviposition by the phorid fly Megaselia halterata (Wood) (Diptera: Phoridae) in uncased and cased compost. Clearly, a majority of the gravid females choose oviposition sites directly after entering the top layer of the compost. In uncased compost, 60% of all adults emerged from the top of four compost layers of equal thickness. When the compost was covered by a casing layer which was still uncolonized by Agaricus bisporus, oviposition was further concentrated in the top compost layer. In this situation, 91% of all adults emerged from the top compost layer whereas only 1.5% emerged from the casing. When the casing layer was colonized by mushroom mycelium, 45% of all adults emerged from the casing layer and 53% emerged from the top compost layer. Further concentration in the top compost layer and the casing layer occurred as a result of upward migration of larvae. When compost was cased after oviposition, up to 43% of all adults emerged from the casing layer. We concluded that in the control of phorid infestations with insect pathogenic nematodes, applications in uncased compost can be restricted to the upper compost layer. When compost and casing are filled simultaneously, nematode applications in the casing layer only could be considered
Control of the mushroom pests Lycoriella auripila (Diptera: Sciaridae) and Megaselia halterata (Diptera: Phoridae) by Steinernema feltiae (Nematoda: Steinernematidae) in field experiments
Scheepmaker, J.W.A. ; Geels, F.P. ; Smits, P.H. ; Griensven, L.J.L.D. van - \ 1997
Annals of Applied Biology 131 (1997). - ISSN 0003-4746 - p. 359 - 368.
Substrate dependent larval development and emergence of the mushroom pests Lycoriella auripila and Megaselia halterata
Scheepmaker, J.W.A. ; Geels, F.P. ; Griensven, L.J.L.D. van; Smits, P.H. - \ 1996
Entomologia Experimentalis et Applicata 79 (1996). - ISSN 0013-8703 - p. 329 - 334.
Invloed van diflubenzuron en Steinernema feltiae op de opbrengst van de champignon Agaricus bisporus
Scheepmaker, J.W.A. ; Geels, F.P. ; Smits, P.H. - \ 1995
De Champignoncultuur 39 (1995)2. - ISSN 0009-1316 - p. 55 - 59.
gewasbescherming - insecticiden - acariciden - mollusciciden - agaricus - oogsttoename - oogstverliezen - opbrengsten - insecten - plantenplagen - compost - groeimedia - culicidae - chironomidae - cecidomyiidae - tabanidae - dolichopodidae - bombyliidae - stratiomyidae - phoridae - pratylenchus - heteroderidae - tylenchidae - nematocera - brachycera - plant protection - insecticides - acaricides - molluscicides - yield increases - yield losses - yields - insects - plant pests - composts - growing media
Nematoden ter bestrijding van de champignonmug en de champignonvlieg. Ze vormen een alternatief voor de chemische bestrijding met het insekticide diflubenzuron
Control of the mushroom sciarid (Lycoriella auripila) and the mushroom phorid (Megaselia halterata) by entomopathogenic nematodes
Scheepmaker, J.W.A. ; Geels, F.P. ; Griensven, L.J.L.D. van; Smits, P.H. - \ 1995
Mushroom Science 14 (1995)2. - ISSN 0077-2364 - p. 491 - 498.
How contact foraging experiences affect preferences for host-related odors in the larval parasitoid Cotesia marginiventris (Cresson) (Hymenoptera: Braconidae).
Turlings, T.C.J. ; Scheepmaker, J.W.A. ; Vet, L.E.M. ; Tumlinson, J.H. ; Lewis, W.J. - \ 1990
Journal of Chemical Ecology 16 (1990). - ISSN 0098-0331 - p. 1577 - 1589.
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