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Management of Blackgrass (Alopecurus myosuroides) in Winter Wheat in Greece

Published online by Cambridge University Press:  12 June 2017

S. Vizantinopoulos  and
N. Katranis
S. Vizantinopoulos
Affiliation:
National Agricultural Research Foundation, Directorate of International Relations, Documentation and Informatics, 19 Egialias Str., 151 25 Maroussi-Greece
N. Katranis
Affiliation:
National Agricultural Research foundation, Research Experimental Station, 351 00, Vardates, Greece
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Abstract

Field experiments were carried out from 1987 to 1990 to develop an integrated weed control management system for the control of blackgrass in winter wheat in Greece. The weed control treatments included both herbicides and cultural measures. The performance of preemergence (PRE) herbicides against blackgrass was better than postemergence (POST) herbicides; selectivity was dependent on application rate. Late timing of wheat sowing resulted in significant reduction of the blackgrass population competing with wheat. The critical period for blackgrass infestation occurred 4.0 to 5.5 wk after wheat emergence. Blackgrass density of 170 to 1,170 plants/m2 caused wheat yield reduction equal to 10 and 30%, respectively. A quadratic relationship describing the percent reduction of wheat yield due to competition with different blackgrass densities was developed. The economic threshold level for blackgrass varied between 100 and 125 plants/m2. The results emphasize the importance of using a combination of chemical and cultural controls, including critical periods for herbicide application in maintaining an integrated approach for blackgrass control in wheat.

Keywords

Blackgrass, Alopecurus myosuroides Huds. # ALOMYwheat, Triticum vulgare L., “Vergina,” “Yekora.”Herbicide applicationhoeingwheat productionAlopecurus myosuroidesPOST, postemergencePRE, preemergenceWAE, weeks after (wheat) emergence
Type
Research
Information
Weed Technology , Volume 12 , Issue 3 , September 1998 , pp. 484 - 490
Copyright
Copyright © 1998 by the Weed Science Society of America 

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