Efficacy of four post-emergence herbicides applied at reduced doses on weeds in summer maize (Zea mays L.) fields in North China Plain

Zhanga, J. and Zhenga, L. and Jäck, O. and et al, . (2013) Efficacy of four post-emergence herbicides applied at reduced doses on weeds in summer maize (Zea mays L.) fields in North China Plain. Crop Protection, 52. pp. 26-32.

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Abstract

Field experiments were conducted in 2010 and 2011 in a typical location of North China Plain to evaluate weed control efficacy of four post-emergence herbicides nicosulfuron, mesotrione, topramezone and the combination of mesotrione/nicosulfuron when they were applied at reduced doses at different weed growth stages. Experimental results showed that nicosulfuron, topramezone and the combination of mesotrione/nicosulfuron provided better weed control efficacy than mesotrione when they were applied at their label recommended doses at the 2- to 3-leaf and 4- to 5-leaf stages of weeds; nicosulfuron and mesotrione/nicosulfuron could at least be reduced by 33% and topramezone reduced by 67% without sacrificing total weed control efficacy and maize grain yield. Nicosulfuron and its combination with mesotrione could effectively control broadleaved and grass weeds when their doses were reduced by 67% and by 33%, respectively. Topramezone could effectively control broadleaved and grass weeds when its dose was reduced by 67%. The efficacy of mesotrione in controlling grass weeds was bad even at the label recommended dose. All four herbicides tested did not affect the maize grain yield

Item Type:	Article
Uncontrolled Keywords:	Dose reduction; Weed control; Topramezone; Nicosulfuron/mesotrione; Grain yield
Author Affiliation:	College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
Subjects:	Plant Protection
Divisions:	Maize
Depositing User:	Mr B Krishnamurthy
Date Deposited:	22 Sep 2013 07:13
Last Modified:	22 Sep 2013 07:13
Official URL:	http://dx.doi.org/10.1016/j.cropro.2013.05.001
URI:	http://eprints.icrisat.ac.in/id/eprint/11716

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