TOLERÂNCIA DO CAPIM AMARGOSO (digitaria insularis) AOS HERBICIDAS flumyzn e metolachlor

Abstract

The initial growth of Margoso grass (Digitaria insularis) plants, mainly under shading conditions or low temperatures, can be suppressed by the faster growth of other species in the weed community (MACHADO et al., 2006). This slow process is caused by its initial growth until 45 days. However, if the herbicide dose is not enough to control it, it can become a dominant species, as in many cases in coffee, citrus and no-till areas, where an application of Glyphosate is effective for other species and unsatisfactory. in the control of this weed (MACHADO et al., 2006). The objective of this work was the greater diligence of the pre-emergent in the fight against the bitter grass, as well as if it has interaction with the culture of the cucumber in sequence. The experience was from the beginning of May and September 23 to September 23 at Instituto Federal Goiano – Campus Urutaí, located at Fazenda Palmital – Rodovia Geraldo Silva Nascimento km 2.5, rural area, municipality of Urutaí, State of Goiás. The soil used in the present work was corrected and fertilized according to the analysis performed, and after this process, the filling of the pots was carried out. The sowing was carried out manually, distributed as seeds of the grazing grass in the recipients. The cucumber planting was carried out with a spacing of 0.6m between rows and 0.45m between plants. The treatments were treated by two types of products (Flalumyzin and four Meto-dosage Treatments), being 1 Treatment of dosage types (50, 100 and 20%), being: 2 (Flumyzin, 75%), Treatment 3 (Flumyzin, 100 %), Treatment 4 (Flumyzin, 200%), Treatment 5 (Metolachlor, 50%), Treatment 6 (Metolachlor, 75%), Treatment 7 (Metolachlor, 100%), Treatment 8 (Metolachlor, 200%) and Treatment 9 as a Witness. Observing the results, we can determine that 7 days after application (DAA), the herbicide Flumyzin performed better in the phytotoxicity notes, however, for the others in the present study, Metolachlor was superior in all doses of the study, being that for the 200% concentration, both were 100% satisfied.