Consulta: creatorFacets:"Leifert, C."
Registros recuperados: 27
Data/hora: 12/06/2024 15:14:52

Effects of crop management factors and the environment on pest and disease incidence in vegetables
Provedor de dados: 21
Autores: Cooper, J.M.; Schmidt, C.S.; Lueck, L.; Shotton, P.N.; Leifert, C.
The Nafferton Factorial Systems Comparison (NFSC) experiments are part of a long-term field trial that compares organic and conventional systems of crop rotation, crop protection and fertility management, in a factorial design.  Pest and disease incidence in vegetables in the 2005, 2006 and 2007 season are reported.  Cabbage root fly damage was always reduced under organic crop protection, but there were no consistent trends for the effects of fertility management on this pest.  Sclerotinia in lettuce was consistently higher under conventional fertility management.  Blight in potatoes was enhanced in the 2007 season by the combination of conventional fertility management and organic crop protection practices.  Mechanisms for these effects, including the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2008
URL: http://orgprints.org/11747/1/Cooper__11747_ed.doc

Improvement of late blight management in organic potato production systems in Europe: field tests with more resistant potato varieties and copper based fungicides
Provedor de dados: 21
Autores: Speiser, B.; Tamm, L.; Amsler, T.; Lambion, J.; Bertrand, C.; Hermansen, A.; Ruissen, M. A.; Haaland, P.; Zarb, J.; Santos, J.; Shotton, P.; Wilcockson, S.; Juntharathep, P.; Ghorbani, R.; Leifert, C.
Late blight of potatoes, caused by Phytophthora infestans, is particularly difficult to prevent or control in organic agriculture. In this study, the host resistance of selected varieties to foliar and tuber blight and their yield under organic growing conditions were assessed in trials carried out in four countries (Switzerland, France, England and Norway) in 2001 and 2002. The objective was to identify new, more resistant varieties which might replace some of the more susceptible varieties which are currently grown in organic agriculture. In each country, five test varieties were compared with two reference varieties, identical for all sites, and with two locally popular varieties. In addition, the effect of copper fungicides was assessed for all...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection.
Ano: 2006
URL: http://orgprints.org/8358/1/Speiser_etal_2006_late_blight.pdf

Blight-MOP: Development of a systems approach for the management of late blight (caused by Phytophthora infestans) in EU organic potato production
Provedor de dados: 21
Autores: Leifert, C.; Wilcockson, S.J.
Blight-MOP  Late blight (caused by Phytophthora infestans) is the most devastating fungal disease affecting organic (and conventional) potato production in the EU. It kills the foliage and usually results in losses of yield which can be very large when infection is severe and occurs early in the season. The disease may be transmitted to the tubers which become unmarketable and these can lead to complete deterioration of the stored crop if put into storage with healthy tubers. To a great extent, conventional production systems rely upon frequent applications of synthetic fungicides with different modes of action for late blight control, but this is seldom completely successful. However, in organic systems, the availability of chemical fungicides is...
Tipo: Report
Palavras-chave: Crop health; Quality; Protection Root crops.
Ano: 2005
URL: http://orgprints.org/10650/1/leifert%2Dwilcockson%2D2005%2Dblight_mop%2Dreport_Front_Cover.pdf

Effect of organic, low-input and conventional production systems on yield and diseases in winter barley
Provedor de dados: 21
Autores: Cooper, J. M.; Schmidt, C. S.; Lueck, L.; Shotton, P. N.; Turnbull, C.; Leifert, C.
The effect of organic, low-input and conventional management practices on barley yield and disease incidence was assessed in field trials over two years. Conventional fertility management (based on mineral fertiliser applications) and conventional crop protection (based on chemosynthetic pesticides) significantly increased the yield of winter barley as compared to organic fertility and crop protection regimes. Severity of leaf blotch (Rhynchosporium secalis) was highest under organic fertility and crop protection management and was correlated inversely with yield. For mildew (Erysiphe graminis), an interaction between fertility management and crop protection was detected. Conventional crop protection reduced severity of the disease, only under conventional...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Cereals; Pulses and oilseeds.
Ano: 2007
URL: http://orgprints.org/10357/1/cooper%2Detal%2D2007%2Dwinter_barley.pdf

Integration of fertility management, cultivar selection and alternative spray treatments to optimize control of foliar diseases of greenhouse grown tomatoes
Provedor de dados: 21
Autores: Dafermos, N.G.; Kasselaki, A.M.; Malathrakis, N.E.; Leifert, C.
Powdery mildew caused by Leveillula taurica (Lev.) Arn. is one of the most serious foliar diseases of greenhouse and open field tomato. The disease is currently controlled with the use of organic fungicides and sulphur, the latter being the only product permitted in organic crops. The aim of this study was to investigate the potential of controlling the disease by integrating: a) hybrids of low susceptibility to the disease, b) organic fertilisers (chitin) and c) alternative spray treatments. Some of the combinations of the above factors were highly effective in decreasing the percentage of disease severity. Specifically the combination of the hybrid of low susceptibility with the addition of chitin in the substrate and the spray treatment...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2007
URL: http://orgprints.org/10397/1/Dafermos%2Detal%2D2007%2DIntegratedcontrolTomatoes.pdf

Effect of clover management (Rhizobium seed inoculation and greenwaste compost amendments) and variety choice on yield and baking quality of organic spring and winter wheat
Provedor de dados: 21
Autores: Wilkinson, A.; Young, D.; Lueck, L.; Cooper, J. M.; Wilkockson, S; Leifert, C.
Yield and protein content of wheat produced under organic standards was repeatedly shown to be between 20 and 40% lower than levels achieved in conventional farming systems. This is thought to be at least partially due to insufficient N-supply to the crop later in the growing season and poor adaptation of the currently used wheat varieties to organic production conditions. To address these problems, a factorial field trial was established to study the effect of Rhizobium inoculation of clover seeds and application of compost amendments to clover swards grown prior to different varieties of wheat. Three winter wheat and four spring wheat varieties were chosen from a range of European breeding programmes. Results showed that variety choice had the greatest...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Cereals; Pulses and oilseeds.
Ano: 2007
URL: http://orgprints.org/10478/1/Wilkinson_O_Final_wheatproductionFINAL.doc

Effect of organic, low-input and conventional production systems on pesticide and growth regulator residues in wheat, potato and cabbage
Provedor de dados: 21
Autores: Lueck, L.; Schmidt, C.S.; Cooper, J.M.; Shotton, P.N.; Hajslova, J.; Schulzova, V.; Leifert, C.
The Nafferton factorial systems comparison (NFSC) experiments facilitate the investigation of effects of, and interaction between, three production system components - a) rotational position, b) fertility and c) crop protection management - in organic, conventional and low-input crop management systems. This paper presents first results on pesticide and growth regulator residues observed over a period of two years. Residues were only detected for three (Chlormequat, Chlorothalonil and Aldicarb) of the 28 pesticides used in the experiments. As expected, residue levels were affected by the crop protection practices, but significant effects of fertility management practices were also detected. This indicates that the human health risks associated with...
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects Crop health; Quality; Protection Farming Systems.
Ano: 2007
URL: http://orgprints.org/10380/1/lueck%2Detal%2D2007%2Dpesticide%2Dgrowth%2Dregulator.pdf

Development of strategies to improve quality and safety and reduce cost of production in organic and ‘low input‘ crop production systems
Provedor de dados: 21
Autores: Tamm, L.; Koepke, U.; Cohen, Y.; Leifert, C.
The overall aims of organic and low input crop production include the economically viable and environmentally sound production of high quality food and feed. Technological bottlenecks in such systems include insufficient and instable yields and in some instances unsatisfactory processing, sensory and/or nutritional quality of the final product. Recently, concerns have also been raised that the intensive use of manures may lead to increased risk for contamination of food by enteropathogenic micro-organisms. Crop production in low input systems is based on key pillars, i.e. (i) a fertile soil which provides sufficient capacity to allow for plant growth while preventing soil-borne diseases, (ii) high quality, disease-free seeds and plant material, (iii) a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover Food security; Food quality and human health.
Ano: 2007
URL: http://orgprints.org/10626/1/Tamm%2Detal%2D2007%2Dcrop_production_system.pdf

The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review
Provedor de dados: 21
Autores: Lammerts van Bueren, E. T.; Jones, S.S.; Tamm, L.; Murphy, K.M.; Myers, J. R; Leifert, C.; Messmer, M.
It is estimated that more than 95% of organic production is based on crop varieties that were bred for the conventional high-input sector. Recent studies have shown that such varieties lack important traits required under organic and low-input production conditions. This is primarily due to selection in conventional breeding programmes being carried out in the background of high inorganic fertilizer and crop protection inputs. Also, some of the traits (e.g., semi-dwarf genes) that were introduced to address problems like lodging in cereals in high-input systems were shown to have negative side-effects (reduced resistance to diseases such as Septoria, lower protein content and poorer nutrient-use efficiency) on the performance of varieties under organic and...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Vegetables Breeding; Genetics and propagation Crop health; Quality; Protection.
Ano: 2011
URL: http://orgprints.org/17861/1/LammertsvanBueren_et_al_NJAS_wheat%2C_tomato%2C_broccoli.pdf

Effects of organic and ‘low input’ production methods on food quality and safety
Provedor de dados: 21
Autores: Leifert, C.; Rembiałkowska, E.; Nielson, J.H.; Cooper, J.M.; Butler, G.; Lueck, L.
The intensification of agricultural production in the last century has resulted in a significant loss of biodiversity, environmental problems and associated societal costs. The use of shorter rotations or monocropping and high levels of mineral fertilisers, pesticides and crop growth regulators may also have had negative impacts on food quality and safety. To reverse the negative environmental and biodiversity impacts of agricultural intensification, a range of different ‘low input’ farming systems have been developed and are now supported by EU and government support schemes. A range of recent reviews concluded that switching to low input, integrated or organic farming practices results in significant environmental benefits and increased biodiversity in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health.
Ano: 2007
URL: http://orgprints.org/10482/1/Leifert%2Detal%2D2007%2Dfood%2Dquality%2Dsafety.pdf

Effect of alternative seed treatments on seed-borne fungal diseases in tomato
Provedor de dados: 21
Autores: Kasselaki, A. M.; Malathrakis, N. E.; Goumas, D. E.; Leifert, C.
The fungus Didymella lycopersici infects tomato seed and results in great losses before and after germination. To control the disease, seed companies use thiram preventively, although human allergy problems have been reported. For this reason as well as to address needs in organic agriculture, this study has focused on the effects of alternative methods of control. Nitrite solutions and resistance inducers were tested in a growth chamber. Results showed that soaking the seed in a nitrite solution with a concentration of 300mΜ (in citric acid buffer, pH 2) for 10 minutes reduced losses due to low seed germination and disease incidence in the germinated seedlings completely. When applied for longer intervals sodium nitrite proved phytotoxic whereas in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2007
URL: http://orgprints.org/10400/1/Kasselaki%2Detal%2D2007%2Dseedbornediseases.pdf

The Effects of Crop Type and Production Systems on the Activity of Beneficial Invertebrates
Provedor de dados: 21
Autores: Eyre, M.D.; Volakakis, N.; Shotton, P.N.; Leifert, C.
Beneficial invertebrate activity (13 groups) was assessed in five crop types on a split-plot experimental system in northern England using pitfall trapping and suction sampling in May-October 2005. Very significant differences were detected in activity between crop type, and in the preference of groups for individual crops. Within crop types, differences in fertiliser and crop protection approaches appeared to significantly affect activity, with preferences for either organic or conventional management differing between groups. In general, inorganic fertiliser application had more effect on activity than pesticide, herbicide and fungicide use.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Farming Systems; Biodiversity and ecosystem services.
Ano: 2007
URL: http://orgprints.org/10391/1/eyre%2Detal%2D2007%2Dbeneficial_invertebrates.pdf

The effect of medium term feeding with organic, low input and conventional diet on selected immune parameters in rat
Provedor de dados: 21
Autores: Baranska, A.; Rembialkowska, E.; Lueck, L.; Leifert, C.
There is currently limited evidence for differences in nutritional value and ‘healthiness’ between organic and conventional foods. While organic standards aim at minimizing antibiotic and/or pesticide residues they have been described as a potential source of high mycotoxin levels, and bacterial diseases or parasites. The aim of this study was to evaluate the effect of rat feeds based on the organic, low input and conventional crops on the rats’ immune system function. Preliminary results obtained indicate a potential immunomodulatory effect of ‘low input’ foods that is not observed in rats fed conventional and organic diets.
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health.
Ano: 2008
URL: http://orgprints.org/12653/1/Baranska_12653_ed.doc

Effect of production system, alternative treatments and calf rearing system on udder health in organic dairy cows
Provedor de dados: 21
Autores: Wagenaar, J.-P.; Klocke, P.; Butler, G.; Smolders, G.; Nielsen, J.H.; Canever, A.; Leifert, C.
In the last decade the main goals of organic dairying have been to attain acceptable levels of milk production, increase opportunities for animals to perform species own behaviour, resulting in improved animal welfare and animal health, and minimize the use of therapeutic interventions, including the reduction of the (preventive) use of antibiotics. Maintaining animal health without the use of therapeutic interventions is a major challenge for organic dairy farmers. In particular, udder health remains a major problem in both conventional and organic farming. In the QualityLowInputFood (QLIF) project udder health status and management were assessed in different production systems and European regions. These studies suggest that good udder health can be...
Tipo: Journal paper
Palavras-chave: Dairy cattle; Health and welfare.
Ano: 2011
URL: http://orgprints.org/20475/1/Wagenaar_et_al_2011.pdf

Effect of production system and geographic location on milk quality parameters
Provedor de dados: 21
Autores: Butler, G.; Stergiadis, S.; Eyre, M.; Leifert, C.; Borsari, A.; Canever, A.; Slots, T.; Nielsen, H.J.
A main reason for the rapid increase in organic food consumption is the perception that organic foods have a superior nutritional composition and/or convey health benefits. However, there is currently limited scientific knowledge about the effect of production systems on food composition. The study reported here compared fatty acid profiles and levels of fat soluble antioxidants in milk from organic and conventional production systems in 5 geographic regions in Europe (Wales, England, Denmark, Sweden and Italy). Levels of nutritionally desirable mono- and poly-unsaturated fatty acids (vaccenic acid, CLA, α-linolenic acid) and/or a range of fat soluble antioxidants were found to be significantly higher in organic milk.
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health.
Ano: 2007
URL: http://orgprints.org/10625/1/butler%2Detal%2D2007%2DProductionSystem_MilkQuality.pdf

Improving the fatty acid profile of winter milk from housed cows with contrasting feeding regimes by oilseed supplementation
Provedor de dados: 21
Autores: Stergiadis, S.; Leifert, C.; Seal, C.J.; Eyre, M.D.; Steinshamm, H.; Butler, G.
Many studies show concentrations of nutritionally desirable fatty acids in bovine milk are lower when cows have no access to grazing, leading to seasonal fluctuations in milk quality if cows are housed for part of the year. This study investigated the potential to improve the fatty acid profiles of bovine milk by oilseed supplementation (rolled linseed and rapeseed) during a period of indoor feeding in both organic and conventional production systems. Both linseed and rapeseed increased the concentrations of total monounsaturated fatty acids, vaccenic acid, oleic acid and rumenic acid in milk, but decreased the concentration of the total and certain individual saturated fatty acids. Linseed resulted in greater changes than rapeseed, and also significantly...
Tipo: Journal paper
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2014
URL: http://orgprints.org/26495/1/stergiadis-etal-2014-FoodChem-p293-300.pdf

Influence of soil type and pH on the colonisation of sugar beet seedlings by antagonistic Pseudomonas and Bacillus strains, and on their control of Pythium damping-off
Provedor de dados: 21
Autores: Schmidt, C. S.; Agostini, F.; Simon,  A. M.; Whyte, J.; Townend, J.; Leifert, C.; Killham, K.; Mullins, C.
In five different soils originating from Scotland (Craibstone and Cruden Bay), Germany ( Magdeburg and Uelzen) and Greece (Tymbaki), Pseudomonas fluorescens B5 reached higher population sizes (4.7-5.7 log CFU/plant) on 12-day-old sugar beet seedlings than Bacillus subtilis MBI 600 (4.1 - 4.8 log CFU/ plant). Total population size per plant was not affected by soil type. In all five soils, the antagonists reached highest population densities in the hypocotyl and the upper 2 cm root section (P. fluorescens B5: 5.2-6.8 log(10) CFU/g plant fresh weight, Bacillus subtilis MBI 600: 5.2 - 6.1 log(10) CFU/g plant fresh weight) and declined to 0 - 3 log(10) CFU below 4 cm root depth. Colonisation by P. fluorescens B5 down the root was slightly increased in the...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Soil biology.
Ano: 2004
URL: http://orgprints.org/10761/1/Schmidt_et_al_2004.pdf

Effect of alternative strategies for the disinfection of tomato seed infected with bacterial canker (Clavibacter michiganensis subsp. michiganensis)
Provedor de dados: 21
Autores: Kasselaki, A. M.; Goumas, D.; Tamm, L.; Fuchs, J.; Cooper, J.; Leifert, C.
Currently there is a lack of effective seed treatments for bacterial pathogens, with Cu-based compounds (the only chemical treatments permitted under organic farming standards) only providing partial control.  The aim of this study was to quantify the effect of alternative treatments for the control of bacterial canker (Clavibacter michiganensis subsp. michiganensis), a major seed-borne bacterial disease in tomato.  Treatments assessed were acidified nitrite (a treatment previously shown to control the seed-borne fungal disease Didymella lycopersici), antagonistic strains of Bacillus spp. and compost extracts, which were not previously evaluated as treatments for seed-borne diseases. Efficacy of treatments was determined in a seed disinfection assay....
Tipo: Journal paper
Palavras-chave: Vegetables Crop health; Quality; Protection.
Ano: 2011
URL: http://orgprints.org/19610/1/kasselaki%2Detal%2D2011%2Dclavibacter%2DNJAS.pdf

Genetic structure and pathogenicity of populations of Phytophthora infestans from organic potato crops in France, Norway, Switzerland and the United Kingdom
Provedor de dados: 21
Autores: Flier, W. G.; Kroon, L. P. N. M.; Hermansen, A.; van Raaij, H. M. G.; Speiser, B.; Tamm, L.; Fuchs, J. G.; Lambion, J.; Razzaghian, J.; Andrivon, D.; Wilcockson, S.; Leifert, C.
Genetic variation and pathogenicity of Phytophthora infestans isolates collected from organic potato crops of the susceptible cv. Bintje and the moderately resistant cv. Santé were assessed in France, Norway, and the United Kingdom in 2001 and in Switzerland in 2001 and 2002. Population structures differed considerably between the four P. infestans populations. Those from France, Switzerland and the UK were mainly clonal populations showing restricted levels of genetic diversity, whilst those from Norway were mixed A1 and A2 mating type populations with high levels of genetic diversity, suggesting periodical sexual reproduction. Isolates collected from cv. Bintje were on average more aggressive than or comparable to isolates from cv. Santé. Race complexity...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Root crops.
Ano: 2007
URL: http://orgprints.org/11106/1/speiser%2Detal%2D2007%2Dplant_pathology_56.pdf

Assessment of the Socio-Economic Impact of Late Blight and State of the Art of Management in European Organic Potato Production Systems
Provedor de dados: 21
Autores: 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

N released from organic amendments is affected by soil management history
Provedor de dados: 21
Autores: Palmer, M.; Cooper, J.M; Fließbach, A.; Melville, J.; Turnbull, C.; Shotton, P.; Leifert, C.
A ryegrass bioassay was conducted to investigate the effect of soil management history on nitrogen mineralisation from composted manure and pelleted poultry manure. Soils were used from 2 field experiments comparing conventional and organic/low input management systems.  When composted manure was added, soils  which had received high rates of composted FYM under biodynamic management released a greater amount of nitrogen for plant uptake than those with a history of mineral or fresh manure fertilisation, suggesting that biological preconditioning may result in greater efficiency of composted FYM as a nitrogen source for plants.  “Native” N mineralisation was found to be related to total soil N content.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2007
URL: http://orgprints.org/10398/1/palmer-etal-2007-soils_management_history.pdf

Biological control of cucumber and sugar beet damping-off caused by Pythium ultimum with bacterial and fungal antagonists
Provedor de dados: 21
Autores: Georgakopoulos, D. G.; Fiddaman,  P.; Leifert, C.; Malathrakis, N. E.
Aims: Five bacterial strains belonging to Bacillus subtilis , Pseudomonas fluorescens and Ps . corrugata and two fungal strains belonging to Trichoderma viride and Gliocladium virens were evaluated for their efficacy in controlling sugar beet and cucumber damping-off caused by Pythium ultimum . Methods and Results: The in vitro antagonistic activity of bacteria against various Pythium spp. was evaluated with dual cultures in various media. Pseudomonas strains inhibited the pathogen better than Bacillus strains. To identify potentially useful antagonist combinations, dual compatibility of antagonists was also evaluated, based on growth in two liquid media containing substrate previously used by other antagonists. Four pairs of bacteria were selected. Sugar...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection Soil biology.
Ano: 2002
URL: http://orgprints.org/10764/1/georgakopoulos_et_al_2002.pdf

Control of enteric pathogens in ready-to-eat vegetable crops in organic and ‘low input’ production systems: a HACCP-based approach
Provedor de dados: 21
Autores: Leifert, C.; Ball, K.; Volakakis, N.; Cooper, J.M.
Risks from pathogens such as Salmonella, Yersinia, Campylobacter and Escherichia coli O157 have been identified as a particular concern for organic and ‘low input’ food production systems that rely on livestock manure as a nutrient source. Current data do not allow any solid conclusions to be drawn about the level of this risk, relative to conventional production systems. This review describes six Risk Reduction Points (RRPs) where risks from enteric pathogens can be reduced in ready-to-eat vegetables. Changes can be made to animal husbandry practices (RRP1) to reduce inoculum levels in manure. Outdoor livestock management (RRP2) can be optimized to eliminate the risk of faecal material entering irrigation water. Manure storage and processing (RRP3), soil...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Values; Standards and certification.
Ano: 2008
URL: http://orgprints.org/16009/1/Leifert%2Detal%2D2008%2DJournal%2Dapplied%2Dmicrobiology%2D105.pdf

Potentials to differentiate milk composition by different feeding strategies
Provedor de dados: 21
Autores: Slots, T.; Butler, G.; Leifert, C.; Kristensen, T.; Skibsted, L.H.; Nielsen, J.H.
To investigate the effect of the dietary intake of the cow on milk composition, bulk-tank milk was collected on 5 occasions from conventional (n = 15) and organic (n = 10) farms in Denmark and on 4 occasions from low-input nonorganic farms in the United Kingdom, along with management and production parameters. Production of milk based on feeding a high intake of cereals, pasture, and grass silage resulted in milk with a high concentration of α-linolenic acid (9.4 ± 0.2 mg/ kg of fatty acids), polyunsaturated fatty acids (3.66 ± 0.07 mg/kg of fatty acids), and natural stereoisomer of α-tocopherol (RRR-α-tocopherol, 18.6 ± 0.5 mg/kg of milk fat). A milk production system using a high proportion of maize silage, by-products, and commercial concentrate mix was...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Dairy cattle Feeding and growth.
Ano: 2009
URL: http://orgprints.org/16018/3/16018.pdf

Effect of variety choice and use of resistant rootstock on crop yield and quality parameters of tomato plants grown in organic, low input and conventional production systems/growth media
Provedor de dados: 21
Autores: Theodoropoulou, A.; Giotis, C.; Hunt, J.; Gilroy, J.; Toufexi, E.; Liopa-Tsakalidis, A.; Markellou, A.; Lueck, L.; Seal, C.; Leifert, C.
Soil-borne diseases are one of the most important problems in organic and other ‘low input’ soil-based greenhouse production systems. While chemical soil disinfection has been the method of choice in conventional farming systems, soil steaming has been the main strategy for the control of soil borne diseases in organic production. Both methods are extremely expensive and have been increasingly restricted for environmental reasons by government and organic standard setting bodies respectively.  The use of tolerant varieties and of grafting onto resistant rootstocks were evaluated as potential replacements for soil steaming in organic and low input systems and found to be as effective in reducing root disease and increasing root fresh weight, fruit yield and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Breeding; Genetics and propagation Vegetables.
Ano: 2007
URL: http://orgprints.org/10449/1/theodoropoulou%2Detal%2D2007%2Dresistant_rootstocks.pdf

Assessment of the Socio-Economic Impact of Late Blight and State-of-the-Art Management in European Organic Potato Production Systems
Provedor de dados: 21
Autores: 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.; Bodker, L.; Bertand, 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. This report presents the results of a detailed survey that has been conducted in 7 European countries in the year 2001: (i) statistics on yields, farm gate prices, and production techniques, (ii) an analysis offarmer...
Tipo: Report
Palavras-chave: Farm economics; Root crops.
Ano: 2004
URL: http://orgprints.org/25358/1/1340-late-blight.pdf

The effect of short term feeding with organic and conventional diets on selected immune parameters in rat
Provedor de dados: 21
Autores: Baranska, A.; Skwarlo-Sonta, K.; Rembialkowska, E.; Brandt, K.; Lueck, L.; Leifert, C.
There is currently no evidence for beneficial health impacts being associated with the consumption of organic rather than conventional foods. This preliminary study was therefore aimed at using haematological parameters, white blood cell (WBC) number and splenocyte proliferation as sensitive assays to evaluate influence of the organic, low input and conventional components in the diet on rats’ immune system function. The results of a short term feeding trial with two rat generations indicates a potential effect on immune system function, which has to be confirmed by longer-term exposure studies.
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health.
Ano: 2007
URL: http://orgprints.org/9921/1/baranska%2Detal%2D2007%2Dshort_term_feeding.pdf