Silage for managing weed seeds

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Abstract

Reducing the number of viable weed seeds entering a field is critical to successful weed management. Viable seeds can result from weed survivors that reach maturity, or can be imported into the field via livestock, grain, fodder, or machinery. Few reports exist on the survival of seeds in silage, or the consequence of feeding the silage to livestock. Seeds from five grass weeds, six broadleaf weeds and three pasture species were ensiled, underwent 48 hour in sacco digestion or both. Seeds germination was determined after incubation at diurnally fluctuating temperatures of 25/15 C.Tetrazolium staining was used to determine the viability of ungerminated seed. Seed germination and viability were compared with untreated seeds. Seed from all grass weeds except annual ryegrass were rendered unviable after being ensiled, whereas some broadleaf weed seeds remained viable. Digestion had a similar effect as ensilage on reducing seed viability, except for silverleaf nightshade and prairie ground cherry where no reduction in viability was observed. The viability of marshmallow seed and the three pasture species was not significantly reduced by either ensilage or digestion. Ensile or digestion can provide non-chemical options for effective weed management for certain weed species.
Original languageEnglish
Title of host publicationProceedings of the 18th Australasian Weeds Conference (2012)
Subtitle of host publicationDeveloping Solutions to Evolving Weed Problems
EditorsValerie Eldershaw
Place of PublicationMelbourne
PublisherWeed Society of Victoria
Pages219-221
Number of pages3
ISBN (Print)9780646586700
Publication statusPublished - 2012
Event18th Australasian Weeds Conference (2012) - The Sebel and Citigate Albert Park, Melbourne, Australia
Duration: 08 Oct 201211 Oct 2012
http://caws.org.au/awc_contents.php?yr=2012 (Conference proceedings)

Conference

Conference18th Australasian Weeds Conference (2012)
Abbreviated titleDeveloping Solutions to Evolving Weed Problems
CountryAustralia
CityMelbourne
Period08/10/1211/10/12
Internet address

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  • Cite this

    Stanton, R., Piltz, J., Rodham, C., & Wu, H. (2012). Silage for managing weed seeds. In V. Eldershaw (Ed.), Proceedings of the 18th Australasian Weeds Conference (2012): Developing Solutions to Evolving Weed Problems (pp. 219-221). Weed Society of Victoria.