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Lucerne production following residual herbicides used in northern cropping systems

Churchett, J., Walker, S. and Lloyd, D. (2002) Lucerne production following residual herbicides used in northern cropping systems. In: 13th Australian Weeds Conference. Plant Protection Society of WA.



Lucerne ( Medicago sativa L.) is finding an increasing role in dryland farming systems of the grain region of northern New South Wales and Queensland as a ley legume to improve soil fertility, grain yield and quality. Residual herbicides play an essential role in weed management in crop rotations in this region, although their persistent residues may damage the susceptible crops sown following their use. Experiments were conducted on two soil types to test the effects of application time of residual herbicides (winter and summer) on the survival and production of lucerne sown in the following autumn/winter.
The effect of the herbicides on initial seedling growth varied with herbicide, rate of application and soil type. Seedling establishment was not affected. Reduced seedling vigour and phototoxicity were evident in some treatments. However, irrespective of seedling response, the lucerne recovered with no subsequent reduction in dry matter production at any site at the first cut taken 5 months after sowing.

Item Type:Book Section
Subjects:Plant culture > Field crops > Forage crops. Feed crops
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Live Archive:11 Jan 2024 23:19
Last Modified:11 Jan 2024 23:19

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