Home
Print _CMN_EMAIL_ALT

Determination of optimal doses of glyphosate for controlling weeds at several stages in southwestern Buenos Aires province (Argentina)

Diego Javier Bentivegna1*, Gisela Lorena Moyano2, Juan Facundo Fabian Daddario1,3, Guillermo Tucat1

 

1Center of Renewable Natural Resources of the Semiarid Zone (CERZOS), National University of the South (UNS), The National Research Council of Argentina (CONICET), Carrindanga Road Km 7, Bahia Blanca, Argentina

2Biology Department, National University of the South, 670 San Juan Street, 8000, Bahia Blanca, Argentina

3Agronomy Department, National University of the South, 800 San Andres Street, 8000, Bahia Blanca, Argentina

 

*Corresponding address:

This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

 

Received: July 27, 2017

Accepted: October 6, 2017

 

Abstract

Efficient weed management is essential for avoiding competition for water, light, and nutrient resources in semiarid zones. Chemical weed control with glyphosate was evaluated on perennial wall-rocket (Diplotaxis tenuifolia), artichoke thistle (Cynara cardunculus), slender wild oat (Avena barbata), and perennial ryegrass (Lolium perenne). Plants at early, middle and advanced vegetative stages were used in this study. Glyphosate potassium salt was applied at rates of 0.0675 (1/16x), 0.135 (1/8x), 0.27 (1/4x), 0.54 (1/2x), 1.08 (x) and 2.16 (2x) kg acid equivalent (ae)  ha–1. Glyphosate combined with 2,4-D amine salt was evaluated at rates of 1.08 kg ae  ha–1 and 0.53 kg active ingredient (ai)  ha–1, respectively. The volume of the spray was 100 l  ha–1 with 86 droplets  cm–2 and a Volume Median Diameter (VMD) of 421.19 μm. In general, all the tested weeds were controlled with a quarter of the label rate. Three sizes of tested plants were controlled in a similar way at the same glyphosate dose rate. Moreover, the addition of 2,4-D to glyphosate did not produce an increase in the control of broadleaf weeds. The results showed that glyphosate was effective in controlling the tested weed species, including low application rates for all the growth stages in the southwestern Buenos Aires province.

Key words: 2,4-D, glyphosate, grasses, phenology, weed control

 

 

 
Editor in Chief
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Managing Editors
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
Current issue cover
Who's Online
We have 5 guests online