Year: 2017
Type: article
Abstract: Volunteer corn is a problematic weed in soybean fields in the USA, where it causes harvest problems and reduces the yield and seed quality of soybean crops. It is a competitive weed, as it grows taller than the soybean plants, and like many other weeds, causes yield reduction by competing with the crop for light, moisture, nutrients and space. There are a number of herbicide inhibitors of the enzyme ACCase, such as clethodim, which are a possible control substance for volunteer corn in soybean. The objective of this study was to determine the influence of adjuvants (crop oil concentrates 3.33% v/v (COC), non-ionic surfactants 0.25% v/v (NIS), methylated seed oil 3.33% v/v (MSO), high surfactant oil concentrate 1.67% v/v (HSOC)), spray nozzles (XR110015, AIXR110015 or TTI110015) and carrier volumes (66 l ha-1 and 132 l ha-1) with clethodim in the control of volunteer corn. The experiment was conducted in controlled conditions at the Department of Agronomy and Horticulture, West Central Research and Extension Center, University of Nebraska - Lincoln, Lincoln, NE 69101, USA. The treatments were in a factorial arrangement, with a randomized complete block design with eight replicates, in two experimental repetitions. Visual injury assessments were recorded at 7, 14, 21 and 28 days after the treatment (DAT). The results have indicated that control of the volunteer corn was maximal (100%) at 66 l ha-1, in clethodim+COC treatments, with the nozzle selection not influencing control at this carrier volume. At greater carrier volume (132 l ha-1), the selection of adjuvants, as well as nozzles, has influenced the clethodim efficacy. The highest efficacy (98%), at greater carrier volume, was recorded in cases where clethodim+COC and clethodim+HSOC treatments were applied by a XR spray nozzle, and in the clethodim+COC treatment, applied by a TTI spray nozzle. Data from this study will be useful to agricultural producers attempting to control volunteer corn (grass weeds) in broadleaf cropping systems.
Source: Acta herbologica
Authors: Anđela Obradović, Greg Kruger, Sava Vrbničanin, Ryan Henry, Canela Vieira
Institutions: University of Belgrade, University of Nebraska–Lincoln
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2911137125