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VCRB :: Contents of Volume 59/2003 :: Detailed information


Ahmet ULUDAG1, Christian BOHREN2, Robert BULCKE3, Mehmet DEMIRCI4, Adam DOBRZAŃSKI5, Robert J. FROUD-WILLIAMS6, Hans HOEK7, Fatima ROCHA8, F. STAGNARI9, Francesco TEI9, Arnd VERSCHWELE10, Carlos ZARAGOZA11
1 Bornova Plant Protection Research Institute, 35040 Bornova/Izmir, Turkey, a.uludag@mailcity.com 2 Station Fédérale de Recherches en Production Végétale, RAC Changins, Nyon, Switzerland 3 Ghent University, Coupure links 653, B-Belgium 4 BASF-Turk, Istanbul, Turkey 5 Research Institute of Vegetable Crops, 96-100 Skierniewice, Poland 6 School of Plant Sciences, The University of Reading, United Kingdom 7 PPO-AGV, Edelhertweg 1, Lelystad, The Netherlands 8 DGPC, Quinta do Marques ,P-2780-155 Oeiras, Portugal 9 University of Perugia, Borgo XX Giugno 74, I- 06121 Perugia, Italy 10Federal Biological Research Centre for Agriculture and Forestry, D-38104 Braunschweig, Germany 11Unidad de Sanidad Vegetal, Servicio Invest. Agroalimentaria, ES-50016 Zaragoza, Spain


The EWRS (European Weed Research Society) Working Group "Weed Management Systems in Vegetables" collected information about key weeds, new weeds or species tending to spread, critical period of weed competition, weed management strategies and approved herbicides in peas grown under field conditions in Belgium (B), Germany (D), Italy (I), The Netherlands (NL), Poland (PL), Portugal (P), Spain (E), Switzerland (CH), Turkey (TR), and the United Kingdom (UK). Weeds not only reduce yields but also interfere with harvest and contaminate the harvested crop. Due to differences in climate, soil type, growing cycle, and cultural practices, the weed flora composition is very variable in the surveyed countries. However, Chenopodium album, Cirsium spp., Galium aparine, Matricaria spp., Poa annua, Polygonum spp., Solanum nigrum, Sonchus spp., Stellaria media and volunteer crops (oil-seed rape in UK; potatoes in CH, NL and UK; wheat in TR) are frequent species in most countries. A parasitic weed, Orobanche crenata is found in E and TR. Chrysanthemum segetum in D, Calystegia sepium in I, Echinochloa crus-galli, Poa annua and volunteer potatoes in NL, and Centurea diluta, Ridolfia segetum in E are becoming important. Although the availability of herbicides approved for use in peas is very different among the surveyed countries, bentazone, cyanazine, pendimethalin and terbutryn, to control both grass and broad-leaved weeds, are registered in most countries. Some herbicides such as cyanazine, fomesafen, prometryn, sethoxydim, and terbutryn not supported in the EU Pesticide Review and will be withdrawn from use in EU countries and tri-allate is no longer manufactured. Due to varying approved herbicides, weed control programs change among the countries, but pre-emergence herbicides are generally preferred to control most key weeds. Integrated weed management systems suggest a narrower crop row spacing in order to promote a higher crop uniformity, crop competitive ability against weeds and a reduction of chemical weed control but a wider row spacing needs to allow inter-row and in-row mechanical weed control. 

keywords:green peas, weed, herbicide, weed control

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