EFICIÊNCIA DE HERBICIDAS NO CONTROLE DE PLANTAS DANINHAS NA CULTURA DO AMENDOIM (Arachis hypogea L.): CULTIVAR BR-1

Abstract

The Peanut (Arachis hypogea L.) is a species of the family Leguminosae most cultivated in the world, which has great economic role, both in family farming and the national agribusiness. In this context, an experiment was conducted to evaluate the efficiency of herbicides in weed control and to verify results in some of the peanut production components cultivate BR-1. The experiment was conducted in experimental design block, with eight treatments and three replications. The applications in post-emergency of molecules were performed manually with knapsack sprayer in isolated doses 50%, 100% and 150% of the recommended dosage (DR). fortnight, new applications were made in previous dosages recombined with dosages of 100%, 200% and 300%, for greater control of weeds During the experiment were carried out mechanical meadows in treatment 2 (T2). In the control treatment (T1) have not adopted any of the control practices of weeds. Data were analyzed by analysis of variance using the F test and means were compared by Tukey test at 5% probability. Production components were evaluated, weight 100 trips, percentage of empty pods, percentage of perfect seeds, weight of 1000 seeds and productivity. There was a significant effect at 5% probability level for the F test for productivity in contrast C1 (control vs. weeding) and C4 (150% of the recommended dose - Bentazon DR vs. DR 150% of fenoxaprop-P-ethyl). In absolute results, T2 (hood) showed the highest weight of 100 pods (147,93g) and productivity (2352.1 kg. ha-1) and a lower value for percentage of empty pods (14%). But the T4 (100% of DR Bentazon) obtained the highest value for percentage of perfect seeds (86.06%). %). In T8 (150% of the DR of fenoxaprop-P-ethyl) were found higher absolute values for the weight of 1000 seeds (470,09g) plus reveal a yield (2258.3 kg. ha-1) and the next seen in hoeing (T2). The control of species eudicotyledons provided greater productivity.