EFICIÊNCIA DE “MATRIZ D” E NOVAS VERSÕES + GLIFOSATO NO CONTROLE DE CAPIM PÉ-DE-GALINHA (Eleusine indica)

Abstract

Crow's foot grass (Eleusine indica) has become a difficult problem to manage, due to competition with the crop of interest, for nutrients, water, space and light, and because it is proving to be resistant to chemical controls, being This is the best way to control crow's foot grass. Glyphosate is the main herbicide for controlling weeds, however, with their resistance, it is necessary to use adjuvants in the mixture to enhance its effect on the weeds. The present work aimed to evaluate the efficiency of new versions of Matriz D and new versions together with glyphosate in managing crow's foot grass; visual phytotoxicity assessment; evaluate the accumulation of shikimic acid and the dry matter index. The experiment, conducted in a greenhouse, consisted of 7 treatments and 4 replications, with a randomized block design. The treatments were: control treatment 1 (Matrix D), treatment 2 (glyphosate), treatment 3 (Matrix D + glyphosate), treatment 4 (SC 21/54-008 + glyphosate), treatment 5 (SC 21/54-009 + glyphosate), treatment 6 (SC 21/54-010 + glyphosate) and treatment 7 (SC 21/54-011 + glyphosate). The Tukey test at 5% probability was used to compare means. The evaluations took place in April and May 2023. On the third day of visual evaluation, treatments 1, 2 and 4 had fewer symptoms of phytotoxicity in response to the products used. From the fourth day after application (D.A.A.), all treatments showed significantly equal results, with the exception of the control, treatment 1. Regarding the change in the shikimic acid route, treatment 5 (SC 21/54 - 009 + glyphosate ) showed the best result among all, with greater accumulation of acid in its route. For dry mass, there was no difference between treatments.