Chemical control of Talinum paniculatum in three stages of development

Abstract

Talinum paniculatum is a species of the Portulacacea family, popularly known as “maria-gorda”, weed in crops such as sugarcane, common bean, soybean, corn and carrot, as well as in non-agricultural areas. This work aimed to study the efficacy of herbicides in the control of T. paniculatum, as well as its effect on fresh and dry mass of these plants in three stages of development. The experimental design was completely randomized, with nine treatments and four replications, positioned in three stages: 4-6 leaves, 10-12 leaves and flowering. To evaluate the effectiveness of the treatments, the percentage of the control of plants was evaluated, in addition to its fresh and dry mass. There was higher control for some treatments within the development stages of weeds, with application of isoxaflutole, diuron+hexazinone, ametryn, and imazapic in the first stage, glyphosate at the dose of 2000 g a.e. ha^-1, diuron+hexazinone and 2,4-D in the second stage, and 2,4-D, glyphosate at 2000 g a.e. ha^-1, and ammonium-glufosinate in the third stage. Fresh and dry mass of weeds were affected, following the behavior obtained for the evaluations of control. The use of herbicides was efficient in the minority of arrangements tested for control of T. paniculatum. The development stage of the plant was influenced by the efficacy control of treatments.