Abstract:
A study of Amazing 480 SC (Mesotrione 480 g/l) biological efficiency against weeds (Bidens
pilosa, Ageratum conyzoides, Cyperus spp., etc.) which caused big damage to sugar cane has
been done at the site of SN-SOSUCO, sugar cane Company, in Burkina Faso. The experimental
design was a completely randomized Fisher block of six treatments in four replications
(untreated control, manual weeding, Chlorimuron-ethyl 250g/ha, Mesotrione 400 ml/ha,
Mesotrione 800 ml/ha, Mesotrione 1333.33 ml/ha). Weeds counting and dry biomass weighing
have been done using a 0.25 m2 quadrant according to Likov and al. (1985) method. The
biological efficiency coefficients have been evaluated using Vilitsky (1989) formula. The
coefficients efficiency of the three rates of Mesotrione 480 g/l varied from 62.01 to 100
according to their number of weeds and from 50.23 to 100 according to their dry biomass weight
compared to the untreated control, during the sugar cane development. However, some weeds as
Ageratum conyzoides, Mitracarpus villosus and Commelina benghalensis were resistant to
different rates of Mesotrione 480 g/l. All these factors allowed to get, for the three rates of
Mesotrione, respectively some yield increase of 178.70%; 207.17% and 242.76% in comparison
to the untreated control. The one of Chlorimuron-ethyl 250 g/ha got an increase of 177.94% in
comparison with the untreated control. For profitability’ reasons, Mesotrione could be apply at
the rate of 800 ml/ha |
