Gramineous herbicide evaluation for controlling (Paspalum fasciculatum Wild.) in oil palm (Elaeis guineensis).
Bullgrass (Paspalum fasciculatum wild.) is one of the most prevalent weeds in the oil palm crop. The objective of the experiment was to compare its control with five herbicides. Three experiments were conducted to evaluate the herbicides haloxyfop-methyl (Galant 240 y Galant 75), fenoxaprop-pmethyl (Excel) and fluazifop-butyl (Fusilade II) at the rates of 50, 75, and 100 g ai/ha-1 and glyphosate (Round up) at the rate of 960 g ai/ha-1 during the first experiment; Galant 240, Galant 75 and Fusilade II at 100 g ai/ha-1 during the second experiment; Galant 240, Fusilade II at the rates of 75 and 100 g ai/ha-1 and glyphosate at 960 g ai/ha-1 during the third trial. A Completely Randomized Block design with four replications was used. Galant 240, Galant 75, and Fusilade II showed the best results as measured by weight of fresh weed, number of affected nodes (herbicide transport), and weed control efficiency percentage. Galant 240 at 100 g ai/ ha-1 was the most profitable option.
BOYDSTON, R.A. 1990. Soil water content affects the activity of four herbicides on green foxtail (Setaria viridis). Weed Science. 38:578-582.
CARMONA, A. 1989. Nuevos productos potencialmente útiles para el control de malas hierbas en palma aceitera. Boletín Técnico O.P.O., Chiquita Brands, San José, Costa Rica. 2(2):57-60.
DOUGLAS, D.B.; BURNSIDE, O.e. 1984. Herbicide activity of fluazifop-butyl, haloxifop-metyl and sethoxydim in soil. WSSA 32:824-831.
GREEN, M.B.; HARTLEY, G.S.; WEST, T.F. 1978. Chemicals for crop protection and pest control. The Incorporated Society of Planters, Good Look News Mart. Kuala Lumpur, Malaysia. 50:676-680.
LEON, H. 1984. Evaluación de herbicidas preemergentes para el control de malezas en palma aceitera joven (Elaeis guineensis Jacq.) en el Pacífico Central. Tesis Ing. Agr. U niversidad de Costa Rica, Facultad de Agronomía San José, Costa Rica. 42 p.
Mc GLAMERY, M. 1986. Chemical cIassification of herbicides technical reference. Ag Consultant and Fieldman. p.10.
SMEDA, R.J.; PUTNAM, AR. 1990. Influence of temperature, rainfall, grass species, and growth stage on efficacy of fluazifop. Weed Technology. 4: 349-355.
THE BRITISH CROP PROTECTION COUNCIL. 1983. The pesticíde manual. 7th edition. Kavenham, Suffolk, Gran Bretaña. 695 p.
VEGA, CA 1988a. Evaluación de herbicidas antiauxínicos en el combate de gamalote (Paspalum fasciculatumWild.) y selectividad al kudzú (Pueraria phaseoloides Roxh Benth.) en plantaciones de palma aceitera (Elaeis guineensis Jacq.). Tesis Ing. Agrónomo, Universidad de Costa Rica, Facultad de Agronomía, San José, Costa Rica. 51 p.
VEGA, CA 1988b. Algunas consideraciones sobre la biología del gamalote. Boletín Técnico O.P.O. Chiquita Brands International. San José, Costa Rica. 2(3):94-97.
VIDRINE, P.R. 1989. Johnsongrass (Sorghum halapense) control in Soybeans (Glycine max) wia emergence herbicides. Weed Technology, 3: 455-458.
WEED SCIENCE SOCIETY OF AMERICA. 1989. Herbicide Handbook. Humphrey Press Inc. New York. 365 p.
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