The efficacy of weed control by glyphosate in potato
Marek Badowski
iung@iung.pulawy.plZakład Ekologii i Zwalczania Chwastów, Instytut Uprawy Nawożenia i Gleboznawstwa, Wrocław (Poland)
Abstract
The aim of the investigations was to assess the efficacy of weed control in potato crops using glyphosate (herbicide Sting CT 120 SL). Field experiments were carried out in the years 2001 and 2002 in the arable field near Wrocław. The field trial was laid out as a randomized complete block design including three replications. All farming measures were performed according to both conventional agricultural practice and the recommendations of the advisory service. Herbicide Sting CT 120 SL was applied in spring after weed germination, but prior to germination of potatoes. The efficacy of weed control was evaluated as a proportion of weeds destroyed. Moreover, a yield from each plot was estimated. No phytotoxic effect of the herbicide on potato plants was observed. Sting CT 120 SL applied in a dose of 4 l/ha controlled 97%–100% of Chenopodium album, Amaranthus retroflexus, Echinochloa crus-galli, Polygonum persicaria, P. convolvulus and Veronica persica, which was comparable to the effects obtained with the mixture Glifosat 360 SL + ammonium sulphate, applied in doses 2 l/ha and 5 kg/ha, respectively. Elymus repens was destroyed in 95%, whereas Convolvulus arvensis was found to be resistant to Sting CT 120 SL. The efficacy of this herbicide in a dose of 3 l/ha was distinctly lower. The yield of potato tubers harvested in the plots treated with the herbicide was higher by 35 to 40% than that obtained from the untreated (control) plot.
Keywords:
glyphosate, potato, weed controlReferences
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Authors
Marek Badowskiiung@iung.pulawy.pl
Zakład Ekologii i Zwalczania Chwastów, Instytut Uprawy Nawożenia i Gleboznawstwa, Wrocław Poland
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Copyright (c) 2004 Marek Badowski
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