MANEJO DE HERBICIDAS NO CONTROLE DE PLANTAS DANINHAS E SUA INFLUÊNCIA NO CRESCIMENTO E PRODUÇÃO DO MILHO HÍBRIDO AG 1051 EVERTON

Abstract

Corn (Zea mays L) is a species that can be cultivated in many parts of the planet as it is diverse in its genotypes. This plant has high nutritional value, being able to feed humans and animals. To obtain higher production, it is necessary to implement new technologies and suitable handling. The competition between corn and weed for water, light and nutrients is what influences the productivity the most. Although, the main control method against weed is chemical control, as it acts fast and is cheap. This research aims to evaluate the influence of using different doses and herbicide mixtures in weed control and growth characteristics and production of hybrid corn AG 1051. Two herbicides were used, DMA 806 BR and Herbadox 400 EC, with the following active ingredients: acid 2,4 D and pendimethalin. The experiment was divided in four blocks, each with 8 parcels of 2m² and 8 treatments. Three seeds were sawn by pit, with 3 cm deep. The treatments were put in isolated applications and consortium from herbicides, aside from two checks: weeded and non-weeded. The evaluated items were accuracy of the herbicide, toxicity, growth and production. The results regarding growth were subjected to variance analysis and were tested to regression analysis until second degree. The treatment results were subjected to Tukey test with probability of 5%. The conclusion was that to control weed, it is advisable to use DMA 806 BR in isolated and consortium. The best growth was observed when applying DMA 806 BR isolated. The Herbadox 400 EC is not recommendable to apply after an emergency. Fitotoxity and productivity were not influenced by the herbicides doses and not for the checks.