Revista Brasileira De Herbicidas 2011; 10(3): 183-189
Efficacy of amicarbazone herbicide in controlling morningglories in sugar cane (Saccharum spp.) crop
The objective of the work was to evaluate the selectivity and efficiency of amicarbazone herbicide in pre-emergency, in controlling Ipomoeas species in sugarcane crop. The experiment was developed between November, 2005 to November, 2006, in Santa Terezinha Farm, Pereira Barreto County, São Paulo State, cultivated by Pioneiros Bioenergia Company. The soil of the area is classified as LVE sandy texture. The experiment was developed in area of sugarcane crop of second year (first cut), with RB 86-5486 genotype and spacing of 1.4 m between lines. Ipomoeas species selected for the experiment: Ipomoea grandifolia, Ipomoea hederifolia, Ipomoea nil, Ipomoea quamoclit and Merremia cissoides, were sowed in parallel lines to the crop lines, after sugarcane cultivation operation. The experimental design was randomized complete blocks, with five treatments and four replications, with plots of 20 m2(5m x 4m). Treatments were constituted by amicarbazone (1050, 1225 and 1400 g ha-1) and checks, with and without weeds. Applications were accomplished in weeds pre-emergency, at 25 days after sugarcane harvest, by using a CO2 pressurized sprayer (45 lb pol-2), with bar equipped with four bar branding tips Teejet XR110.03, spaced of 0.5 m and spray volume of 200 L ha-1. It was concluded that amicarbazone herbicide (1050, 1225 and 1400 g ha-1) was selective to sugarcane plants and highly efficient in controlling I. grandifolia, I. hederifolia, I. nil, I. quamoclit and M. cissoides.
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