Poor adaptation of Trifolium subterraneum L. (subterranean clover) and Medicago sativa L. (lucerne) subterranean clover across southeastern Australia due to acidic soils, insufficient rainfall resulting in false breaks, high input costs, soil acidification and the emergence of herbicide resistant weeds have reduced establishment. To overcome these challenges, numerous novel pasture species have been released but limited knowledge exists regarding their competitive or allelopathic ability to suppress weeds. Field trials were therefore conducted at Wagga Wagga NSW over a three year period to evaluate (a) the suppressive potential of selected pasture legumes grown as monocultures and in mixed stands against volunteer weeds, and (b) the impact of summer (March) and winter (June) sowing dates on establishment. Weed and crop cover and biomass was measured from 2015 to 2017. Results suggest species mixtures with more than one pasture legume did not impact (P<0.05) establishment and subsequent weed infestation. However, summer sowing of arrowleaf clover, yellow serradella cv. Avila and French serradella/bladder clover generally resulted in increased (P<0.05) crop cover in all three growing seasons. Interestingly, arrowleaf clover and biserrula cv. Casbah produced significantly greater crop biomass and less weed biomass. Weed suppression and subsequent biomass was not always dependent on crop biomass however, as was the case for yellow serradella cv. Santorini over the period of 2016-2017. In summary, results have demonstrated that arrowleaf clover, biserrula cv. Casbah and yellow serradella cv. Santorini were the most reliable and competitive annual legumes with respective to yearly regeneration and consistent suppression of pasture weed species in the Riverina.
|Publication status||Published - 10 Sep 2018|
|Event||21st Australasian Weeds Conference 2018: Weed biosecurity - Protecting our future - Novotel Sydney Manly Pacific, Manly, Australia|
Duration: 09 Sep 2018 → 12 Sep 2018
http://caws.org.nz/old-site/awc_contents.php?yr=2018 (conference proceedings)
https://abercrombie.eventsair.com/QuickEventWebsitePortal/21awc/21awc-web/Agenda (conference program)
|Conference||21st Australasian Weeds Conference 2018|
|Period||09/09/18 → 12/09/18|
|Other||The Weed Society of New South Wales Inc., on behalf of the Council of Australasian Weed Societies Inc., will be hosting the 21st Australasian Weeds Conference in the popular Sydney beach side suburb of Manly from 9 - 12 September 2018. An assortment of field trips will be hosted on Thursday 13 September 2018.|
This biennial conference carries on a long tradition of bringing the weed management community together to discuss new developments and share information about cutting-edge and best weed management practices.
The conference attracts over 250 delegates from across Australasia and globally. Delegates will come together to network with peers, engage with industry sponsors, listen and participate in presentations and field trips on a variety of topics including;
- New technologies in weed management.
- Biological, mechanical, and chemical weed control and research.
- Herbicide resistance.
- Weeds of crops and pastures.
- Environmental weeds and Weeds of National Significance.
- WEE .0146