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Herbicides in rape and water quality.

dc.creatorPierre, J.G, autor. aut 56402
dc.descriptionThe results of 3 years' research into the effect of herbicides used in rape crops in France on soil and water quality are presented. Information on the frequency of use of the 19 different products approved for use is summarized, and the dangers posed by pollution are explored. Surveys conducted to measure the levels of trifluralin and metazachlor (the most widely-used herbicides) in groundwater in Central Region indicated that trifluralin was absent, but metazachlor was found at 7 of 51 sites sampled, and at one of these at a level of0.1 Ág/litre. Field experiments conducted in 1996 in Champagne on fluvial soils over a calcareous base to monitor the levels and movement of trifluralin and metazachlor into surface drainage water indicated that trifluralin levels were generally lower than metazachlor levels, and it also moved through drainage water the faster; however, both herbicides remained above levels of the previous year at the end of the 4-month sampling period. The results of sampling underground water from below rendzina monoblocks indicated that trifluralin was found on 8 of 14 sampling dates at 0.02-0.09 Ág/litre while metazachlor was found on 2 at 0.03 Ág.
dc.description7 ref.
dc.descriptionThe results of 3 years' research into the effect of herbicides used in rape crops in France on soil and water quality are presented. Information on the frequency of use of the 19 different products approved for use is summarized, and the dangers posed by pollution are explored. Surveys conducted to measure the levels of trifluralin and metazachlor (the most widely-used herbicides) in groundwater in Central Region indicated that trifluralin was absent, but metazachlor was found at 7 of 51 sites sampled, and at one of these at a level of0.1 Ág/litre. Field experiments conducted in 1996 in Champagne on fluvial soils over a calcareous base to monitor the levels and movement of trifluralin and metazachlor into surface drainage water indicated that trifluralin levels were generally lower than metazachlor levels, and it also moved through drainage water the faster; however, both herbicides remained above levels of the previous year at the end of the 4-month sampling period. The results of sampling underground water from below rendzina monoblocks indicated that trifluralin was found on 8 of 14 sampling dates at 0.02-0.09 Ág/litre while metazachlor was found on 2 at 0.03 Ág.
dc.languaged
dc.relation
dc.subjectchemical control
dc.subjectfatty oil plants
dc.subjectgroundwater
dc.subjectherbicide residues
dc.subjectherbicides
dc.subjectmetazachlor
dc.subjectoilseed plants
dc.subjectRape.
dc.subjectresidues
dc.subjectsoil water
dc.subjectswede rape
dc.subjectTrifluralina.
dc.subjectwater pollution
dc.subjectweed control
dc.subjectweeds
dc.subjectGroundwater
dc.subjectGroundwater
dc.subjectHerbicides
dc.subjectHerbicides
dc.subjectOilseed plants
dc.subjectSoil moisture
dc.subjectWater
dc.subjectWater pollution
dc.subjectWeeds
dc.subjectWeeds
dc.subjectWeeds
dc.subjectEcology.
dc.titleHerbicides in rape and water quality.
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