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Monitoring Striga asiatica (Orobanchaceae) seedbank for eradication success

Williams, A. M., Riding, N. and Vitelli, J. S. (2022) Monitoring Striga asiatica (Orobanchaceae) seedbank for eradication success. In: 22nd Australasian Weeds Conference, 25 – 29 September 2022, Adelaide, South Australia.


Publisher URL: https://researchoutput.csu.edu.au/ws/portalfiles/portal/262619333/22AWC_Proceedings_Rev_B_SEC_IDX.pdf


To enable evaluation of eradication efforts for the parasitic plant Striga asiatica (L.) Kuntze, seed sachets were buried in perforated PVC canisters at 25 sites across the infested area in July 2016. The canister sites were selected based on the proximity to previous S. asiatica detections and cover the range of soil types and topographies associated within the eradication program treatment area. At each site the canisters received the same eradication treatments that were applied to the surrounding area. Site characteristics necessitated different combinations of false host (soybean), true host (corn), fumigant (dazomet), stimulant (ethylene) and herbicide treatments, to achieve a rapid decline in the soil seed bank.
The viability of retrieved seeds shows an accelerated decline (92.5 % to 6.5 % in four years) across all sites in response to the treatments irrespective of treatment combination used. The viability of seeds was found to vary across sites, burial depth and time. The information collected has provided valuable data for the eradication of S. asiatica in Australia and for evaluating the timing for
release of paddocks from active treatment.

Item Type:Conference or Workshop Item (Paper)
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Biosecurity Queensland
Subjects:Plant pests and diseases > Weeds, parasitic plants etc
Plant pests and diseases > Pest control and treatment of diseases. Plant protection
Live Archive:06 Feb 2024 05:36
Last Modified:06 Feb 2024 05:36

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