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Registros recuperados: 5
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Effect of tomato deleafing on mirids, the natural predators of whiteflies Inra
Bonato, O.; Ridray, G..
Sustainability in Mediterranean greenhouse agrosystems involves environmentally- friendly techniques based on biological and non- chemical methods. Deleafing is a common agricultural practice used to accelerate fruit ripening and facilitate farming methods. However, deleafing may have an impact on mirids, a natural predator used to control whiteflies, which are considered among the most noxious insect pests of field and greenhouse crops worldwide. Here we studied the impact of leaf removal on populations of mirids. Two deleafing practices were tested: ( a) regular deleafing, with the first removal of 2 leaves per plant 10 weeks after sowing; and ( b) delayed deleafing, in which the first removal was delayed by 14 days. Our results show that regular...
Tipo: Journal Article Palavras-chave: PREDATEUR; ALEURODE; DEFOLIATION; MOUCHE BLANCHE DELEAFING; IMPACT; MACROLOPHUS CALIGINOSUS; BEMISIA TABACI; TRIALEURODES VAPORARIORUM; TOMATO.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200841867b22&uri=/notices/prodinra1/2010/09/
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Fluctuations in sugar content are not determinant in explaining variations in vitamin C in tomato fruit Inra
Massot, C.; Génard, M.; Stevens, R.; Gautier, H..
The present study aimed to clarify the relationship between sugars and vitamin C in fruit. The objective was to determine whether vitamin C content was regulated by sugar content due to the role of sugar as a precursor for vitamin C. During summer, maximal content in sugar and vitamin C were found in both genotypes tested Solanum lycopersicon ‘Cervil’ and ‘Levovil’. During autumn, fruit pruning increased fruit size and hexose content but fruit vitamin C content did not increase. Therefore sugar substrate was not limiting for vitamin C synthesis during autumn. We demonstrated for two cultivars, ‘Cervil’ and ‘Levovil’, with different sugar accumulation profiles during ripening, that sugar content was not determinant in the regulation of vitamin C content....
Tipo: Journal Article Palavras-chave: TENEUR EN SUCRE; VITAMINE C; CHARGE EN FRUIT; LUMINOSITE SUGARS; FRUIT LOAD; FRUIT QUALITY; TOMATO; VITAMIN C.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010ca0df624&uri=/notices/prodinra1/2010/09/
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Les stratégies de contrôle de la qualité dans les Organisations de Producteurs de tomates Inra
Bouhsina, Z.; Codron, J.M.; Cordier, E.; Soubeyran, R.; Brajeul, E.. (Collaborateur); Glermot, C.. (Collaborateur); Letard, M.. (Collaborateur); Navez, B.. (Collaborateur).
Ce texte aborde les problèmes d'action collective dans le contrôle de la qualité sanitaire des produits avant leur mise en marché par les Organisations de Producteurs. Il est une synthèse des résultats de l'enquête menée auprès des responsables qualité de l'ensemble des OP adhérant à la Charte Nationale Tomate sur leurs pratiques de contrôle de la qualité sanitaire des tomates. L'enquête a eu le soutien des responsables de la Charte Nationale Tomate, qui regroupe la quasi-totalité de la production organisée en France. Elle avait pour objectif d'identifier la diversité des pratiques de contrôle au sein des OP et de mesurer l'effet de la "taille de l'OP" sur les modalités de contrôle mises en place. L'enquête montre qu’au-delà des règles communes imposées...
Tipo: BMSR Palavras-chave: RESIDU DE PESTICIDES; GROUPEMENT DE PRODUCTEURS; ORGANISATIONS DE PRODUCTEURS; CONTROLE DE LA QUALITE; PASSAGER CLANDESTIN; SANCTION; RESIDU DE PESTICIDES PRODUCERS'UNIONS; FREE-RIDING; MONITORING; ENFORCEMENT; CONTROL; PESTICIDE RESIDUES; TOMATO.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201018d8f87d&uri=/notices/prodinra1/2010/08/
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Metabolic characterization of loci affecting sensory attributes in tomato allows an assessment of the influence of the levels of primary metabolites and volatile organic contents Inra
Zanor, M.I.; Rambla, J.L.; Chaib, J.; Steppa, A.; Medina, A.; Grannell, A.; Fernie, A.; Causse, M..
Numerous studies have revealed the extent of genetic and phenotypic variation between both species and cultivars of tomato. Using a series of tomato lines resulting from crosses between a cherry tomato and three independentlarge fruit cultivar (Levovil, VilB, and VilD), extensive profiling of both central primary metabolism and volatile organic components of the fruit was performed. In this study, it was possible to define a number of quantitative trait loci (QTLs) which determined the levels of primary metabolites and/or volatile organic components and to evaluate their co-location with previously defined organoleptic QTLs. Correlation analyses between either the primary metabolites or the volatile organic compounds and organoleptic properties revealed a...
Tipo: Journal Article Palavras-chave: CROISEMENT INTERSPECIFIQUE METABOLITE PROFILING; VOLATILE PROFILING; QTL SENSORY PROFILING; TOMATO.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009153c8248&uri=/notices/prodinra1/2009/09/
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Model-assisted analysis of tomato fruit growth in relation to carbon and water fluxes Inra
Liu, H.F.; Génard, M.; Guichard, S.; Bertin, N..
This work proposed a model of tomato growth adapted from the Fishman and Genard model developed to predict carbon and water accumulation in peach fruit. The main adaptations relied on the literature on tomato and mainly concerned: (i) the decrease in cell wall extensibility coefficient during fruit development; (ii) the increase in the membrane reflection coefficient to solute from 0 to 1, which accounted for the switch from symplasmic to apoplasmic phloem unloading, and (iii) the negative influence of the initial fruit weight on the maximum rate of active carbon uptake based on the assumption of higher competition for carbon among cells in large fruits containing more cells. A sensitivity analysis was performed and the model was calibrated and evaluated...
Tipo: Journal Article Palavras-chave: FLUX DE CARBONE; FLUX D'EAU; CROISSANCE DU FRUIT; CROISSANCE CELLULAIRE CARBON FLUX; CELL EXPANSION; FRUIT GROWTH; HUMIDITY; TOMATO; MODEL; WATER FLUX.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20084abe2ae1&uri=/notices/prodinra1/2009/11/
Registros recuperados: 5
Primeira ... 1 ... Última
 

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