Herbigation in a Vineyard: Efficacy and Persistence of Five Pre-emergence Herbicides in a Sandy Soil

J.C. Fourie
1993 South African Journal of Enology and Viticulture  
The persistence of simazine, oxadiazon, napropamide, oryzalin and acetochlor in a sandy soil was monitored over a period of 60 days by means of a bio-assay. Sixty days after application 3% of simazine, 5% of acetochlor, 6% of oxadiazon, 53% of oryzalin, and 54% ofnapropamide, initially present, were detected in the 0-300 mm soil layer. Simazine, oxadiazon, acetochlor and napropamide leached. Oryzalin was resistant to leaching and showed the highest efficacy and therefore is the most suitable
more » ... use on sandy soils. The herbicides were more efficacious when applied in a 5 mm herbigation than in a 16 mm herbigation. The criteria established for herbigation on a sandy soil could be used as a guideline for light-textured soils.
doi:10.21548/14-1-2167 fatcat:4mtdv22bpzcprb4kck4wfpnxhq