Search results for "oilseed rape"
showing 4 items of 14 documents
Approches de la nuisibilité du bleuet en colza d'hiver
2016
Infestation of oilseed rape fields by cornflower is more and more frequent, which could become harmful. In contrast, cornflower produces nectar that is a resource for pollinators and probably crop pest predators and parasitoides. In order to get benefit of this resource, it is necessary to determine a balanced equilibrium between the services and the weediness of cornflower in spite of destroying it. We describe here bispecific competition trials against oilseed rape in small experimental plots. Experimental conditions led to too high or too small plant densities to estimate a threshold of competition. Results provide relevant information on self-concurrence among cornflower plants and on i…
Assessment of genetically modified oilseed rape MS8, RF3 and MS8×RF3 for renewal of authorisation under regulation (EC) No 1829/2003 (application EFS…
2017
Efsa Panel On Genetically Modified Organisms (gmo)Opinion scientificRequestor: European CommissionQuestion number: EFSA-Q-2016-00569; Following the submission of application EFSA-GMO-RX-004 under Regulation (EC) No 1829/2003 from Bayer CropScience, the Panel on Genetically Modified Organisms of the European Food Safety Authority (GMO Panel) was asked to deliver a scientific risk assessment on the data submitted in the context of the renewal of authorisation application of the genetically modified (GM) herbicide-tolerant oilseed rape MS8, RF3 and MS89RF3. The data received in the context of this renewal application contain post-market environmental monitoring reports, systematic searches and…
Applying an operating model for the environmental risk assessment in Italian Sites of Community Importance (SCI) of the European Commission Habitats …
2013
The fast development of agro-biotechnologies asks for a harmonized approach in risk analysis of GMO's releases, where "risk analysis" entails the assessment, management and communication of risk. Risk assessment consists in the evaluation of the likelihood that a hazard occurs, associated with the presence of the receptor(s) in the receiving environment, and the determination of their potential degree of exposure to the hazard. The whole process has to be both science based and applied case by case, and it involves a very complicated procedure that needs to be transformed in an operational and standardized tool. Beginning in 2003, an expert group on behalf of the Italian Ministry of the Env…
La nuisibilité directe des adventices en grandes cultures : quelles réponses nous apportent les essais désherbages ?
2016
The direct harmful effect of weeds in field crops : what do herbicide trials tell us ? Weeds are plants whose undesirable qualities (“harmfulness") outweigh their desirable qualities (trophic resources). Few studies conclude that weeds do not affect crop yield. However, it is difficult to generalize since weeds compete with crops for resources and these resources are spatially and temporally variable. This study analyzed 110 herbicide trials (untreated vs. treated plots) performed in France from 1993 to 2015 on three major grain crops: winter wheat, winter oilseed rape and sunflower. Significant yield losses were found in 92% of wheat trials (average over all trials: -2.6 t/ha), 51% of wint…