1,721,080 research outputs found
Weed Management Systems in Vegetables
No full textThe EWRS Working Group "Weed Management Systems in Vegetables" was established with the tasks of collecting and disseminating information and results on weeds and weed control strategies in vegetables, identifying gaps in knowledge and focusing new research projects.
WG has members from 21 countries.
Information about key weeds, new weeds or species that have recently spread, critical period of competition, weed management programmes in Integrated and Organic production, approved herbicides and those currently undergoing registration for use in onions, processing tomatoes, carrots, peas, cabbages and lettuce grown under field conditions in several European and extra-European countries was collected and disseminated
Influenza del tipo di lavorazione del terreno sulla dinamica della flora infestante il girasole
No full text
Il danno causato dalla tardiva eliminazione delle erbe infestanti nella coltura del girasole
No full textCompetitive ability and threshold levels of three broadleaf weed species in sunflower
No full textData collected from field trials carried out in different years and environments were used to determine competitive ability and threshold levels of Ammi majus L., Chenopodium album L. and Sinapis arvensis L. The hyperbolic model showed a good fit to the experimental data. The three broadleaf weeds showed low and similar competitive indices (i ranging from 1.08 to 1.75), supporting the hypothesis of a high sunflower competitive ability. The economic threshold was four to six plants m−2 for all three weeds in the case of weed control by hoeing and about six plants m−2 for S. arvensis in the case of a postemergence treatment with imazamethabenz. Limitations and approximations in estimating competitive parameters are pointed out and discussed
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