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The efficacy of chaff lining and chaff tramlining in controlling problem weeds

Ruttledge, A., Widderick, M., Walsh, M., Broster, J., Bell, K., Rayner, A. and Jalaludin, A. (2018) The efficacy of chaff lining and chaff tramlining in controlling problem weeds. GRDC Update . p. 45.

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Article Link(s): https://grdc.com.au/resources-and-publications/grd...

Abstract

Take Home Messages
Use chaff lining or chaff tramlining concentrates weed seeds into a narrow area.
A heavy layer of chaff will lead to better suppression of weed emergence.
Small seeded broadleaf weeds (e.g. common sowthistle) are more easily suppressed than grass weeds with larger seeds (e.g. annual ryegrass).
Thick tramlines and chaff lines reduce but do not prevent weed emergence, so other measures may be needed to control weeds in tramlines/chaff lines (e.g. spraying the tramlines with a shielded sprayer).
Background
Herbicide resistance is a major concern for northern region crop production due to the increasing frequency of resistance in key weeds. Of particular concern is the increasing incidence of glyphosate resistance, with 9 weed species now confirmed as glyphosate resistant in the northern region (Heap, 2018). Regardless of the ever-increasing frequency of herbicide-resistance, herbicides will likely remain the most effective form of weed control in cropping systems. However, for herbicides to remain effective, non-herbicide weed management alternatives are needed to delay the spread and onset of further herbicide resistance (Walsh et al., 2013). One such alternative is harvest weed seed control (HWSC).

In this paper we report on research evaluating the effectiveness of chaff tramlining and chaff lining as harvest weed seed control tactics for northern region weeds.

Chaff lining and chaff tramlining are forms of harvest weed seed control (HWSC) that have potential for widespread adoption in northern Australia owing to their relative low cost and ease-of-implementation. Chaff tramlining is the practice of concentrating the weed seed bearing chaff material on dedicated tramlines in controlled traffic farming (CTF) systems. Chaff lining is a similar concept, where the chaff material is concentrated in a narrow row between stubble rows directly behind the harvester. The chaff environment is likely to be suboptimal for seed persistence and seedling establishment, therefore, this practice has the potential to be as effective as other forms of harvest weed seed control in depleting weed seed banks.

Item Type:Article
Business groups:Crop and Food Science
Subjects:Science > Invasive Species > Plants > Eradication and containment
Science > Invasive Species > Plants > Integrated weed control
Deposited On:05 Mar 2019 00:28
Last Modified:05 Mar 2019 00:28

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