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Registros recuperados: 15
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Assessment of the Socio-Economic Impact of Late Blight and State of the Art of Management in European Organic Potato Production Systems Organic Eprints
Tamm, L.; Smit, A.B.; Hospers, M.; Janssens, S.R.M.; Buurma, J.S.; Molgaard, J.-P.; Laerke, P.E.; Hansen, H.H.; Hermans, A.; Boedker, L.; Bertrand, C.; Lambion, J.; Finckh, M.R.; Schüler, Chr.; Lammerts van Bueren, E.; Ruissen, T.; Nielsen, B.J.; Solberg, S.; Speiser, B.; Wolfe, M.S.; Phillips, S.; Wilcoxon, S.J.; Leifert, C..
In Europe, late blight, caused by Phytophthora infestans, is the most devastating disease affecting organic (and conventional) potato production. Under suitable environmental conditions the disease can spread rapidly and it can cause complete crop loss. The extent of damage due to late blight depends on several factors: in organic production systems these factors include climate, choice of variety, soil management and use of crop protection agents such as copper. Therefore, the extent of economic damage varies between European regions. Council Regulation (EEC) No 2092/91, amended by Commission Regulation (EC) No 473/2002 of 15 March 2002 regulates the use of copper in organic agriculture. Copper has been the single most important control agent in...
Tipo: Book Palavras-chave: Crop health; Quality; Protection Root crops.
Ano: 2004 URL: http://orgprints.org/2936/1/tamm%2Det%2Dal%2D2004%2Dblight%2Dmop%2Doe.pdf
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Bygbladplet, biologi og bekæmpelse Organic Eprints
Jørgensen, L.N.; Pinnschmidt, H.; Nielsen, B.J.; Nielsen, G.C..
Bygbladplet udvikler med års mellemrum kraftige angreb i modtagelige sorter, som kan give op til 30-40% udbyttetab. - Svampen er udsædsbåren, ligesom den smitter via halmrester, vinterbyg og spildkornsplanter af byg. - Udsædsbåren bygbladplet kan medføre kraftige bladangreb senere på sæsonen. - Kornpartier med over 15% angrebne kerner bør ikke bruges ubejdset som udsæd. - Bygbladplet fremmes af fugtige forhold, men kan godt udvikle sig alene som følge af dug om natten. Optimale temperaturer for svampen er 15-25° C. - Især i vårbyg varierer sorternes modtagelighed over for bygbladplet. Valg af sorter med god resistens er vigtig for at mindske risikoen for angreb. - Sorternes modtagelighed kan også variere fra mark til mark, fordi der findes forskellige...
Tipo: Report Palavras-chave: Crop health; Quality; Protection.
Ano: 2004 URL: http://orgprints.org/3903/1/3903.pdf
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Quantitative relationships in the infection cycle of seed-borne net blotch Organic Eprints
Pinnschmidt, H.O.; Nielsen, B.J.; Hansen, H.J..
Seed-borne net blotch is a threat to organic barley seed production in Denmark because it often exceeds the recommended 15% contamination threshold in barley seed lots. This threatens the supply of organic barley growers with organically produced healthy barley seeds. The ORGSEED project aims at quantifying the links between initial seed contamination, primary seedling infection, disease severity during the growing season, yield parameters and new contamination of the harvested grains to improve decision support for handling net blotch contaminations in organic barley- and barley seed production. The harvested grains of spring barley varieties grown at several sites in Denmark in 2002 and 2003 were used as seed lots in subsequent trials in 2003 and 2004....
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection.
Ano: 2005 URL: http://orgprints.org/7932/1/7932.pdf
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Resistance to leaf stripe (Pyrenophora graminea) in barley and common bunt (Tilletia tritici) in wheat and use of integrated strategies to control seed-borne diseases Organic Eprints
Nielsen, B.J..
Resistance to leaf stripe (Pyrenophora graminea) in barley and common bunt (Tilletia tritici) in wheat and use of integrated strategies to control seed-borne diseases
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2003 URL: http://orgprints.org/1796/1/Abstract_ICPP2003_SeedBorne_BJN.doc
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Resistens mod stinkbrand i vinterhvede Organic Eprints
Nielsen, B.J..
Danish wheat varieties are tested on a set of different Tilletia populations for their level of resistance. Resistance to bunt is studied by inoculating seeds artificially with different populations of bunt before sowing. 5 g of spores per kg of seeds is used, and the ”isolates” used are selected among the 50-60 different populations of bunt collected from different parts of the country. 2-3 different populations are used for inoculation the first year, and varieties showing good resistance are tested further in the following years on 3-6 new populations. The susceptible variety Herzog (up to 86% attack) and the highly resistant variety Stava (normally 0-0.2% attack) are included every year as reference. In July the number of ears with attacks of bunt is...
Tipo: Report Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation.
Ano: 2004 URL: http://orgprints.org/7975/1/Sortsfors%C3%B8g_2004.pdf
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Resistens mod stinkbrand i vinterhvede Organic Eprints
Nielsen, B.J..
Danish wheat varieties are tested on a set of different Tilletia populations for their level of resistance. Resistance to bunt is studied by inoculating seeds artificially with different populations of bunt before sowing. 5 g of spores per kg of seeds is used, and the ”isolates” used are selected among the 50-60 different populations of bunt collected from different parts of the country. 2-3 different populations are used for inoculation the first year, and varieties showing good resistance are tested further in the following years on 3-6 new populations. The susceptible variety Herzog (up to 86% attack) and the highly resistant variety Stava (normally 0-0.2% attack) are included every year as reference. In July the number of ears with attacks of bunt is...
Tipo: Report Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation.
Ano: 2005 URL: http://orgprints.org/7978/1/7978.pdf
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Resistens mod stinkbrand i vinterhvede Organic Eprints
Nielsen, B.J..
Danish wheat varieties are tested on a set of different Tilletia populations for their level of resistance. Resistance to bunt is studied by inoculating seeds artificially with different populations of bunt before sowing. 5 g of spores per kg of seeds is used, and the ”isolates” used are selected among the 50-60 different populations of bunt collected from different parts of the country. 2-3 different populations are used for inoculation the first year, and varieties showing good resistance are tested further in the following years on 3-6 new populations. The susceptible variety Herzog (up to 86% attack) and the highly resistant variety Stava (normally 0-0.2% attack) are included every year as reference. In July the number of ears with attacks of bunt is...
Tipo: Report Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation.
Ano: 2003 URL: http://orgprints.org/7974/1/7974.pdf
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Resistens mod stinkbrand i vinterhvede & resistens mod stribesyge i vårbyg Organic Eprints
Nielsen, B.J..
Danish wheat varieties are tested on a set of different Tilletia populations for their level of resistance. Resistance to bunt is studied by inoculating seeds artificially with different populations of bunt before sowing. 5 g of spores per kg of seeds is used, and the ”isolates” used are selected among the 50-60 different populations of bunt collected from different parts of the country. 2-3 different populations are used for inoculation the first year, and varieties showing good resistance are tested further in the following years on 3-6 new populations. The susceptible variety Herzog (up to 86% attack) and the highly resistant variety Stava (normally 0-0.2% attack) are included every year as reference. In July the number of ears with attacks of bunt is...
Tipo: Report Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation.
Ano: 2002 URL: http://orgprints.org/7969/1/7969.pdf
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Screening for resistance to leaf stripe (Pyrenophora graminea) in barley Organic Eprints
Nielsen, B.J..
Resistance against leaf stripe (Pyrenophora graminea ) have been described in the literature, but only little is known about the resistance in modern varieties. Investigations have been started in co-operation with Danish breeders with the objective to ensure availability of healthy seed for pesticide-free and organic growing of cereals. The results so far show great variation in susceptibility to leaf stripe. Most of the tested varieties or lines were susceptible, but some varieties had a moderate level of resistance and a few were highly resistant. The test have been made with different populations collected from Denmark but only little is known about the virulence pattern in leaf stripe.
Tipo: Conference paper, poster, etc. Palavras-chave: "Organics" in general.
Ano: 2004 URL: http://orgprints.org/3873/1/3873.pdf
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Strategies for avoiding seed borne diseases Organic Eprints
Nielsen, B.J..
Strategies for avoiding seed borne diseases
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2003 URL: http://orgprints.org/1798/1/seedborne_Strategies_BTS_RACI_2003_BJNIELSEN.doc
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The science of increasing production of organic grains Organic Eprints
Nielsen, B.J..
The science of increasing production of organic grains
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2003 URL: http://orgprints.org/1797/1/Organic_BTS_RACI_2003_BJNIELSEN.doc
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Threshold values for seed borne diseases of cereals and legumes Organic Eprints
Nielsen, B.J..
Threshold values for seed borne diseases of cereals and legumes
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2002 URL: http://orgprints.org/1794/1/Thresholdvalues_organicSeed_BentNielsen_ECOPB.doc
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Udsædsbårne sygdomme i korn – bejdsemidler og andre behandlingsmetoder. 19. Danske Planteværnskonference 2002, Sygdomme og Skadedyr Organic Eprints
Nielsen, B.J..
Udsædsbårne sygdomme i korn – bejdsemidler og andre behandlingsmetoder
Tipo: Report chapter Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2002 URL: http://orgprints.org/1799/1/PVCkonf_02_udsaed.doc
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Udsædsbårne sygdomme i økologisk såsæd - betydning og skadetærskler Organic Eprints
Nielsen, B.J.; Nielsen, G.C.; Pinnschmidt, H.; Wolffhechel, H.; Justesen, A.F.; Hansen, H.J.; Borgen, A.; Bødker, L.; Kristensen, E.F..
Det økologiske projekt ORGSEED har givet ny viden om skadetærsklerne for de vigtigste udsædsbårne sygdomme i korn og ærter. I projektets sidste del vil disse tærskelværdier blive vurderet med henblik på justering. Sammenholdt med nye metoder til bestemmelse af den faktiske forekomst af udsædsbårne sygdomme, vil det give en mere sikker karakterisering af den økologiske såsæd og hermed mindre unødig kassation.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection.
Ano: 2006 URL: http://orgprints.org/8047/1/8047.pdf
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Vurdering af konsekvenser ved afvikling af bejdsemidler Organic Eprints
Nielsen, B.J.; Borgen, Anders; Scheel, Christiane; Nielsen, G.C..
Effektiv og systematisk bejdsning af størstedelen af den danske såsæd har medført, at alvorlige og tabsgivende frøbårne sygdomme har været holdt på et meget lavt niveau. En stor del af sædekornet (85-90%) bejdses i dag, mens bejdsning af andre afgrøder varierer en del afhængig af den aktuelle forekomst af sygdomme. Det samlede forbrug af bejdsemidler (fungicider og insekticider ) ligger i størrelsesordenen 80-110 t virksomt stof ( i 1994 11-12 % af det samlede fungicid og insekticidforbrug eller omkring 3 % af det samlede pesticidforbrug). Sygdommene er, trods denne systematiske indsats, ikke udryddet, men kun holdt på et lavt niveau. I en fremtidig dyrkningspraksis uden effektiv bekæmpelse af frøbårne sygdomme, ville en række alvorlige sygdomme relativt...
Tipo: Report Palavras-chave: Crop health; Quality; Protection.
Ano: 1998 URL: http://orgprints.org/34207/3/aukenrap_34207.pdf
Registros recuperados: 15
Primeira ... 1 ... Última
 

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