Abstract
<p>Weed control is fundamental in coffee cultivation due to their high interference, competing with the crop for water, light and nutrients. Among the control methods used, chemical control is highlighted, due to its high efficiency and low cost. However, due to application failures, herbicide drift phytotoxicity is common. Aiming at the search for selective active ingredients in coffee, the objective of this study was to evaluate the selectivity of the active ingredient Glyphosate in young coffee plants. The experiment was carried out in a greenhouse with ‘Topázio MG1190’ coffee plants (<em>Coffea arabica</em> L.), cultivated in pots with an 11 L-substrate capacity. The statistical design was RBD, with four replications and four doses of the herbicide, making up 16 experimental plots. Each plot consisted of three plants. The treatments were: (i) 0%; (ii) 10%; (iii) 25% and (iv) 50% of the commercial dose of the herbicide Glyphosate. The evaluations were performed at 104 days after application of the treatments. Growth, morphological, physiological and anatomical characteristics were evaluated. The collected data were analyzed using the SISVAR software. The effect of glyphosate drift impairs plant growth. However, after 104 days of intoxication, there is no longer any effect on the physiology and leaf anatomy of coffee trees.</p>
Highlights
The coffee agribusiness is of great importance in the Brazilian economy, and it is responsible for the generation of income and jobs (CAIXETA, 2008)
The period of greatest crop sensitivity to weed incidence occurs in the first year of implantation, mainly in the planting line, where it is frequently necessary to adopt manual control, which is more difficult and costly due to the increasing scarcity of manpower in the field and
For the simulation of intoxication, ‘Topázio MG1190’ coffee (Coffea arabica L.) seedlings were planted in 11-L pots, with 4-5 pairs of leaves
Summary
The coffee agribusiness is of great importance in the Brazilian economy, and it is responsible for the generation of income and jobs (CAIXETA, 2008). Coffee crop yield is directly related to several factors, among them, soil fertility, plant nutrition, phytosanitary control, application technologies, climatic conditions and weed management can be highlighted (OLIVEIRA, 2013). In this context, weed incidence stands out as one of the most important, mainly due to the competition with coffee for water, light and nutrients (FIALHO et al, 2011; LORENZI, 2014). It may hamper crop cultivation, such as fertilization, harvesting and pest and disease control (RONCHI et al, 2003b). The period of greatest crop sensitivity to weed incidence occurs in the first year of implantation, mainly in the planting line, where it is frequently necessary to adopt manual control, which is more difficult and costly due to the increasing scarcity of manpower in the field and Coffee Science, Lavras, v. 14, n. 1, p. 76 - 82, jan./mar. 2019
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