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Registros recuperados: 11
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A new system to evaluate Organic Inputs in EU. How does if affect the grower Organic Eprints
Trapman, Marc.
Conclusions (1) What can be solved: - Possibly quicker - More transparent, technical and objective evaluation that allows for development What can not be solved: - Differences between countries due to lack of active policy for local registration of Organic Inputs Conclusions (2) What should be considered System effects in: - “domino” effects in the use of other PPP” - substitution of PPP’s - preventing resistance - moving organic production to geographical areas where more Inputs are allowed Conclusions (3) A transparent, technical and system-based evaluation of input materials, aimed at further and equal development of organic agriculture in all EU member states would be highly welcome!
Tipo: Conference paper, poster, etc. Palavras-chave: Quality and evaluation of inputs.
Ano: 2005 URL: http://orgprints.org/6088/1/trapman_2005_Practitioners_view.pdf
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A simulation program for the timing of fungicides to control Sooty Blotch in organic apple growing. First results in 2003 Organic Eprints
Trapman, Marc.
A simulation program for infections by Sooty Blotch was developed based on literature data and expert judgements. The value of the model as tool for timing fungicide sprays to control Sooty Blotch was tested in 2003 in two randomized plot trials, and four “on farm” trials where the treatments where made by the growers. Disease pressure was relative low due to the warm and dry summer of 2003. Two to five post infection treatments with lime sulfur or coconut soap aimed at severe infection periods as indicated by the model provides 72 to 100 % control.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2004 URL: http://orgprints.org/14068/1/11_Trapman_56_66.pdf
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CO-FREE Alternative Test Products for Copper Reduction in Agriculture Organic Eprints
Schmitt, Annegret; Scherf, Andrea; Mazzotta, S; Kühne, Stefan; Pertot, Ilaria; Köhl, Jürgen; Markellou, Emilia; Andrivon, Didier; Pellé, R; Bousseau, M; Chauvin, J-E; Thiéry, D; Delière, Laurent; Kowalska, Jolanta; Parveaud, Claude-Eric; Petit, Audrey; Giovinazzo, Robert; Brenner, Johanna; Kelderer, Markus; Lammerts van Bueren, E.T.; Bruns, Christian; Finckh, Maria R.; Kleinhenz, Benno; Smith, Jo; Simon-Levert, A; Pujos, P.; Trapman, Marc; Stark, J; van Cutsem, P; Neerakkal, S; Kleeberg, Hubertus; Peters, Arne; Tamm, Lucius.
The project CO-FREE (2012-2016) aimed to develop strategies to replace/reduce copper use in organic, integrated and conventional farming. CO-FREE alternative test products (CTPs) were tested and integrated together with decision support systems, disease-tolerant varieties, and innovative breeding goals (ideotypes) into improved management strategies. CO-FREE focused on apple/apple scab (Venturia inaequalis), grape/downy mildew (Plasmopara viticola), and tomato and potato/late blight (Phytophthora infestans). Starting point of the project were ten CTPs with direct or indirect modes of action including Trichoderma atroviride SC1 and protein extract SCNB, Lysobacter spp., yeast-based derivatives, Cladosporium cladosporioides H39, the oligosaccharidic complex...
Tipo: Book chapter Palavras-chave: Crop health; Quality; Protection.
Ano: 2017 URL: http://orgprints.org/35120/1/45_Schmitt_et_al_CO-FREE_Alternative_Test_Products_for_Copper_Reduction_in_Agriculture_0294-sp-2017-Reinh-45-6.pdf
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Contributions of EU-project REPCO to apple scab control Organic Eprints
Köhl, Jürgen; Heijne, Bart; Hockenhull, John; Pedersen, Hanne Lindhard; Trapman, Marc; Eiben, Ute; Tamm, Lucius.
The objective of REPCO is to contribute to the replacement of copper fungicides in organic agriculture by new measures for control of downy mildew (Plasmopara viticola) in grapevine and scab (Venturia inaequalis) in apple. Both major European organic crops strongly depend on copper fungicides. Permitted amounts will be reduced stepwise during the following years (Council Regulation (EEC) 2092/91, Annex II) to avoid environmental risks. In European countries where copper fungicides are already out of use, production of organic apples suffers severe economical problems because of insufficient scab control. Potentiators of resistance, organically based fungicides and biocontrol agents are screened and evaluated in apple. Effects of crop management...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2006 URL: http://orgprints.org/13796/1/ecofruit_12th_13.pdf
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Diplodia seriata, cause of black fruit rot in organically grown apples in Holland, Belgium and Northern Germany Organic Eprints
Trapman, Marc; Maxin, Peter; Weber, Roland W. S..
A fruit rot resembling Gloeosporium infections but appearing on fruits prior to harvest was noticed in organic apple orchards in Holland, Belgium and Northern Germany in 2007. Infections were most commonly observed on ‘Elstar’, but other cultivars were also affected. Fruit colonisation progressed in two steps, whereby a latent stage of sunken black lesions in immature fruits gave rise to a rapidly spreading firm brown rot upon fruit ripening. Isolation experiments from both stages consistently yielded a single species of fungus identified as Diplodia seriata, formerly known under the teleomorph name Botryosphaeria obtusa. Lesions of D. seriata were also seen on leaves as necrotic light brown spots surrounded by a purple halo, and occasionally on...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2008 URL: http://orgprints.org/13668/1/177%2D181.pdf
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Disease management in organic apple orchards is more than applying the right product at the correct time Organic Eprints
Trapman, Marc; Jansonius, Pieter Jans.
The relative importance of diseases on apple is varying with cultivar, management, time, and climate. Many aspects of the cropping system influence the development of diseases. The choice of the variety determines the disease management during the lifetime of the orchard. Cultural practices improve the growth and nutrial status of the tree, and therewith influence the susceptibility of the plant and fruits to diseases directly. Prolonged growth can also have an indirect effect by causing a microclimate and growing pattern that favours infection of tree, leafs and fruits by various diseases. Sanitation measures are common practise for most organic fruit growers and help to make other measures more effective by reducing infection inoculums. Despite...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2008 URL: http://orgprints.org/13633/1/016%2D022.pdf
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Evaluation of grapefruit seed extract as natural fungicide to control apple scab in organic apple growing Organic Eprints
Trapman, Marc.
C-pro, an experimental fungicide based on grapefruit seed extract was compared to copper oxychloride for the control of apple scab in a field trial. Efficacy and possible phytotoxic effects where accessed. The C-pro formulation was analysed for possible chemical additives by HPTLC. C-pro proved tot be more effective in controlling apple scab then the standard rate of 300 gram copper oxychloride per ha, and gave a better leaf quality and less fruit skin russeting then the standard program of copper oxychloride. However C-pro contained 6.6 % of the synthetic preservation agent benzethonium chloride what excludes C-pro from use in organic agriculture. There is a growing interest in grapefruit seed extract products as well as in other plant extracts...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2004 URL: http://orgprints.org/14540/1/38_Trapman_202_207.pdf
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Observations on the epidemiology of Sooty Blotch in Organic orchards in the Netherlands Organic Eprints
Trapman, Marc.
From 2002 to 2005 field observations where made on the occurrence of Sooty Blotch (SB) in unsprayed orchards on the apple variety Topaz. First SB symptoms in high inoculum orchards where found after on average 639 leaf wetness hours following the first rain 10 days after petal fall. Even then symptoms where present only on places on the fruits that probably stayed wet longer than the leaf wetness sensors have indicated. Weather stations that are set up to register average orchard conditions are unlikely to detect the wetness conditions that lead to SB infections in critical parts of the orchard. From the delayed symptom development compared to the published data form USA we concluded that un-der Dutch conditions the lower temperature retards the symptom...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2006 URL: http://orgprints.org/8841/1/ecofruit_12th_22.pdf
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Resistance management in Vf apple scab resistant organic apple orchards Organic Eprints
Trapman, Marc.
Modern Vf scab resistant apple varieties open the way for organic growers to lower fungicide input, higher yields, better skin quality, more biological control for mites and insect pests and better consumer acceptance of their management practices. Manny examples in the past years have shown however that the Vf resis-tance can be easily overcome by local scab populations in north-western Europe. Discussions during the meetings of the IOBC working group Diseases in Orchards in 2000 in Fontevraud (France) and in 2003 in Lindau (Germany) lead to a set of management practises necessary to prevent gene-fulx, and selection to-wards Vf virulence in the local apple scab populations. Eleven orchards of the Vf resistant apple variety Santana that where planted...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2006 URL: http://orgprints.org/8837/1/ecofruit_12th_19%2D1.pdf
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The effectiveness of winter treatments with copper or lime sulphur to control Sooty Blotch on apple. Organic Eprints
Trapman, Marc; Tamm, Lucius; Fuchs, Jacques G..
In 2002 and 2003 two randomized trials and three “on farm” trials where carried out to test the hypothesis that a single winter treatment could reduce the primary inoculum of Sooty Blotch sufficiently to prevent fruit disease during summer. copperoxychloride (0.2%-0.4%) and lime sulfur (4.0%-5.0%) were applied until run-off in March shortly before bud break. Assessments of Sooty Blotch incidence and severity where made immediately after harvest. The winter treatments with copperoxychloride did reduce disease severity during summer in one case. The treatments with lime sulfur reduced the disease level in three sites to some extent. However, winter treatments alone were not nearly as efficient as summer treatments. Therefore, we see no reason to...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2004 URL: http://orgprints.org/14075/1/12_Trapman_67_72.pdf
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The post infection use of Lime sulphur to control apple scab. Experiences in the Netherlands 1999-2002 Organic Eprints
Trapman, Marc.
Until yet the fongicides in organic fruit growing (sulphur, lime sulphur, copper, claypowders) are used as protectants applied before the rain, or as stop-spray or during infection development. Post infection use of lime sulphur could reduce the number of spray rounds, allowing for the use of less pesticides, and reducing the adverse effect on beneficial insects and mites. In the 30's of the last century, post-infection effects of lime sulphur were found in lab and field trials. Effective control was achieved by applications 30 to even 72 hours after the start of rain. Field trials in the Netherlands in 1999, 2000 and 2001 confirmed that post-infection applications of lime sulphur are effective under field conditions till at least 20 hours after the start...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2002 URL: http://orgprints.org/14601/1/trapman_63.pdf
Registros recuperados: 11
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