SciELO - Scientific Electronic Library Online

 
vol.27 issue1The effect of adjuvants on glyphosate absorption and translocation in water hyacinth (Eichhornia crassipes)Management of Digitaria insularis sprouts under no-till corn cultivation author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Planta Daninha

Print version ISSN 0100-8358On-line version ISSN 1806-9681

Abstract

PANOZZO, L.E. et al. Cyperus esculentus handling methods in irrigated rice. Planta daninha [online]. 2009, vol.27, n.1, pp.165-174. ISSN 0100-8358.  http://dx.doi.org/10.1590/S0100-83582009000100021.

The Cyperaceae family include the most important weeds found in the state of Rio Grande do Sul rice fields. The objective of this work was to evaluate Cyperus esculentus control and rice cv. Qualimax 1 selectivity and grain yield in function of the irrigation starting times, application times and penoxsulam rates. The trial was set up under field conditions in the agricultural year of 2005/2006 and was arranged in a completely randomized block design with split plots and four replications. Treatments were in a factorial scheme (2 x 3 x 5) and consisted of two herbicide application times (early and late), three irrigation starting times (1, 15 and 30 days after treatment), and herbicide rates (0, 24, 36, 48 and 60 g ha-1 ). The herbicide penoxsulam showed selectivity to the rice culture regardless of the association between the evaluated treatments. The application of penoxsulam, combined with irrigation starting 15 days after herbicide application promoted efficient control of C. esculentus. Highest grain yield was obtained by applying penoxsulam at the rates of 36 g ha-1 or above, regardless of the application time, and when early irrigation was carried out.

Keywords : Oryza sativa; penoxsulam; crop irrigation; application times; cyperaceas.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License