CONTROLE DE PLANTAS DANINHAS NA CULTURA DO MILHO-DOCE

Abstract

One of the biggest concerns in agriculture today is related to the weeds interference in the productivity and yield of installed crops. Thus, the weeds management in the agricultural production process assumes fundamental importance in the choice of practices that aim at the control which will result in greater productivity. The sweet corn crop is classified as special, a vegetable aimed at industrial processing and still little used for "in natura" consumption, being exclusively destined for human consumption. This work aims to study different chemical weed control systems, based on the herbicides combination, in order to evaluate the criteria: plant height, stem diameter, weed control index and the interference in productivity and yield that the culture can suffer in face of these managements. The experiment was carried out in the field under central pivot irrigation in the agricultural year 2021 in the experimental area of IF Goiano, Campus Morrinhos-GO. The sweet corn hybrid used was Syngenta GSS 2577 and the treatments consisted of the herbicides application in pre-emergence and/or post-emergence. All treatments with the association of atrazine provided control above 88% of the weeds. The best results among treatments with the use of phytosanitary products for both ECP, ESP and EF were obtained from the mixture of atrazine 500 g/l (3 L ha-1) and tembotrione 420 g/l (0.24 L ha-1) applied in post emergence. Treatment with emergency use S-metalachlor 960 g/l (1.2 L ha-1) and mesotrione 480 g/l (0.3 L ha-1) in pre-emergence + mesotrione 50 g/l (1 L ha-1) and atrazine 500 g/l (3 L ha-1) in post emergence, it stood out as the one that provided the highest industrial yield, even surpassing the control with total weed control.