Physical and herbicide weed control in wide row lupins in Western Australia

Document Type

Conference Proceeding

Publication Date

9-2014

Conference Title

19th Australasian Weeds Conference

Place of Publication

Hobart, Tasmania

ISBN

978-0-646-92454-0

Keywords

Lupins, wide rows, inter-row cultivation, shielded spraying, metribuzin, annual ryegrass, wild radish.

Disciplines

Agricultural Science | Agronomy and Crop Sciences | Weed Science

Abstract

Inter-row cultivation or shielded spraying can be used within wide row crops, in order to reduce weed growth between crop rows while causing minimal damage to the crop plants. However, this only kills weeds between the rows and weeds remain within the crop row (i.e. in-row weeds). Removing weed seed laden soil from the row (i.e. mechanical sweeps over the row) and spraying a narrow band of herbicide directly onto the crop row at seeding may help reduce the problem of in-row weeds. Metribuzin may be an effective herbicide to band over the row, for tolerant lupin (Lupinus angustifolius L.) varieties like Coromup. However, metribuzin is not registered for this practice.

The aim of the study was to assess the effect of over-the-row scraper sweeps and banded herbicides at seeding, and inter-row cultivation after lupin emergence, on weed numbers and lupin crop growth and yield.

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