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Red rice (Oryza satlva L ) has been a serious problem in rice fields for hundreds of years and even now no effective control measure exist. In this study, new approaches were evaluated. Flooding for two weeks prior to seeding IR-22 eliminated 99 percent of the tall variety Bluebonnet 50, which ha...
Two trials were conducted in the screenhouse of CIAT (Centro Internacional de Agricultura Tropical), located in Palmira, Colombia, to obtain information on how soil characteristics affect the growth of purple nutsedge (Cyperus rotundus L.). One was designed to determine the effect of five levels ...
The effect of shade on the growth and development of purple nutsedge (Cyperus rotundus L.) was studied to determine the feasibility of integrating cultural control (shading) with other control methods. Pots with tubers from the Departments of Córdoba and Valle were placed under shades of 0, 44, 5...
Six experiments with sorghum, soybean, and the weed purple nutsedge were conducted in the screenhouse of the Centro Internacional de Agricultura Tropical (CIAT), Palmira, Colombia. The objective was to determine if purple nutsedge produced inhibitors which affect crop growth and to study the effe...
Information is lacking concerning the viability and longevity of weed seeds in tropical Latin America. This study observed the germinative ability of seeds of 20 weed species common in annual crops and 12 common pasture weeds for two years. They were collected, cleaned and stored dry in the labor...
The most serious weed problems faced by ranchers are comprised of brushy species. Foliar, cut-stump, basal and soil applications of herbicides were evaluated on the most common species on ranches of the North Coast of Colombia from 1972 through 1975. Most of the species tested were resistant to f...
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