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Registros recuperados: 6
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Black spot diseases in carrot Organic Eprints
Voorrips, Roeland E.; Zijlstra, Sierd; Köhl, Jürgen; Kastelein, Pieter.
An important problem in organic carrot production in the Netherlands is the occurrence of black spots during storage. Several different fungal pathogens cause similar symptoms, which are collectively known as black spot diseases. We identified Alternaria radicina, A. dauci and Rhexocercosporidium carotae (syn. Acrothecium carotae) as the most prevalent black spot pathogens. We developed laboratory test methods for resistance to A. radicina and R. carotae, and assessed resistance in a collection of cultivated varieties and more exotic material.
Tipo: Conference paper, poster, etc.
Ano: 2006 URL: http://orgprints.org/7314/1/Black_spot_diseases_in_carrot.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; Lindhard Pedersen, Hanne; Trapmann, 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 practices...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Fruit and berries.
Ano: 2006 URL: http://orgprints.org/8820/1/ecofruit_12th_13.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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Integrated disease management Organic Eprints
Köhl, Jürgen.
Integrated disease management in organic farming combines the use of various measures. The usefulness of certain measures depends on the specific crop-pathogen combination. In many crops, preventative measures can control diseases without the need of plant protection products. However, for certain disease problems, preventative measures are not sufficient. For example, organic apple production strongly depends on the multiple use plant protection products.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection.
Ano: 2006 URL: http://orgprints.org/8206/1/Integrated_disease_management%2Djkohl.pdf
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Screening of micro-organisms for Venturia inaequalis control by means of DGGE Organic Eprints
Speksnijder, Arjen; Lombaers- van der Plas, Carin; Köhl, Jürgen.
Venturia inaequalis causes apple scab. The control of the disease in organic apple production depends on the use of copper which will be restricted in future for environmental reasons. In the search for environmental friendly microbial biocontrol agents and stimulation of antagonistic populations in situ the molecular technique of DGGE fingerprinting can is applied. This fingerprinting technique allows to bypass culturing techniques and even can identify not yet culturable organisms. Comparison of microbial fingerprints and pathogen development in the leaf samples during winter and spring has been performed to identify populations with antagonistic potential. Such potential antagonistic organisms can be further identified by their specific DNA...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection.
Ano: 2006 URL: http://orgprints.org/7431/1/ArjenJOC.pdf
Registros recuperados: 6
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