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Planta Daninha

Print version ISSN 0100-8358

Abstract

PEREIRA, M.R.R. et al. Responses of Eleusine indica plants under different water conditions to ACCase-inhibiting herbicides. Planta daninha [online]. 2011, vol.29, n.2, pp. 397-404. ISSN 0100-8358.  http://dx.doi.org/10.1590/S0100-83582011000200017.

The objective of this study to evaluate the control efficiency of ACCase -inhibiting herbicides applied during post-emergence on plants of Eleusine indica under different soil water contents. The experiments were conducted in a greenhouse, with the application of three different herbicides (fluazifop-p-butyl, haloxyfop-methyl and sethoxydim + oil Assist) Each herbicide experiment was arranged in a completely randomized design with four replications, consisting of a 3 x 4 factorial scheme, with the water management strategy combinations (-0.03, -0.07 and -1.5 MPa) and four doses of these products (100, 50, 25 and 0% of the recommended dose). The physiological parameters were: photosynthetic rate, stomatal conductance, transpiration, leaf temperature and plant dry weight. Visual assessments of plant toxicity were performed at 14 days after application. Water management did not influence plant control in the treatments tested, except for sethoxydim, which had its water efficiency affected as water deficiency occurred during the application of fractionated doses. Photosynthetic rate, transpiration, and stomatal conductance were higher in plants submitted to water management of 13%, also showing the lowest leaf temperatures in relation to ambient temperature.

Keywords : goosegrass; chemical control; water restriction; weed.

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