Journal of Food, Agriculture and Environment

Sorghum halepense (Johnsongrass) water extract effects as alone and integrated with current methods on weed control in soybean

Author(s):

Faezeh Movahedpour, Adel Dabbagh Mohammadi Nassab *, Mohammad Reza Shakiba, Saied Aharizad

Recieved Date: 2010-06-27, Accepted Date: 2010-10-21

Abstract:

Weeds cause substantial decline in agriculture production. Producers need to manage the weed community to optimize grain quantity and quality. In current weed managements indiscriminate use of chemicals for weeds may pose environmental problems. Therefore, natural herbicide produced from allelopathic plants is a new technique, which can be used for controlling weeds as a substitute for chemical herbicides. In this regard a field experiment was carried out to investigate the efficacy of various weed control methods and Sorghum halepense L. (Johnsongrass) water extract (SHWE) spray on Glycine max L. Merrill (soybean) production and weed infestation at the Agricultural Research Station, Faculty of Agriculture, University of Tabriz at 2008. Two factors included SHWE spray at four levels as no-spray, one spraying at 15 days after emergence (DAE), two sprays at 15 and 30 DAE and three sprays at 15, 30 and 40 DAE and weed control methods in four levels as two hand-weedings, Trifluralin (pre-planting application), Trifluralin plus two hand-weedings and weedy check. The experiment was carried out as factorial based on randomized complete block design with three replications. All weed control methods and SHWE spray treatments increased soybean grain yield significantly. SHWE spray at one, two and three times increased soybean grain yield by 21.17, 31.97 and 42.51% in comparison with control, respectively. Two foliar sprays of SHWE could substitute chemical herbicides and it can be integrated with physical method to produce efficient weed control in integrated weed management system for soybean field.

Keywords:

Sorghum halepense (Johnsongrass), Glycine max (soybean), water extract, weed management

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Agriculture
Pages: 908-913

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