International Journal of Agricultural Policy and Research
Vol.4 (1), pp. 7-16, January 2016
Available online at https://www.journalissues.org/IJAPR/
Article 16/ID/JPR97/10/ pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
Biological efficiency of hexazinon on sugar cane weeds and its effects on soil agrochemical properties, in Burkina Faso
Kambou Georges and Ouattara Boubakar
INERA FARAKOBA Research Laboratory, P. O. Box 403, Bobo – Dioulasso, Burkina Faso
*Corresponding Author Email: kambougeorges2000(at)yahoo.fr
Tel: +2267800 9103
A study of herbicidal activity of hexazinone 750 g/kg for reducing weeds such as Vernonia cinerea and Cyperus sp. and its secondary effects on soil agrochemical properties was carried out in the sugarcane fields at Bérégadougou in Burkina Faso. The biological efficacy of herbicides was evaluated by counting and weighing the dry biomass of weeds using a sampling square of 0.25 m² placed on four tufts diagonally on the 4 lines of the useful plot. The biological efficiency coefficients of hexazinone at 480 g/ha ranged from – 125.00 to 100.00%, while at high doses of 800, 960 and 1440 g/ha, it ranged from 37.33 to 100%. The soil nitrogen nitrate and available phosphorus contents were evaluated with a spectrophotometer. The available potassium contents in hexazinone treatments were not different from those of manual weeding during the maturity stage. On the opposite, those of nitrate nitrogen decreased by 24.97 to 37.40% compared to the manual weeding. All these factors provided hexazinone 1440 g/ha a yield surplus of 20.42% compared to the untreated control, an extractable sugar and sucrose contents equivalent to manual weeding. Hexazinone did not disturb at the studied doses, the dynamic evolution of soil agrochemical components.
Key words: Agrochemical properties, Cyperus sp, hexazinone, sugarcane, vernonia cinerea, weeds.