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New South Wales DPI
Department of Agriculture and Fisheries (Queensland) (DAF QLD)
| Researcher(s) |
Jo Holloway Caitlin Langley Lily Tenhave Rachel Wood |
|---|---|
| Contact email | joanne.holloway@dpi.nsw.gov.au |
| Year(s) | 2021 - 2022 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
Wagga Wagga, ACT
|
| Further information | View external link |
Resistance to phosphine in stored grain insects from farm storages in south-eastern Australia: 2021
• Approximately 3% of all stored grain insects collected had strong resistance to phosphine – a marked reduction from 18% in 2016.
• Improved hygiene is the probable reason for the observed reduction in resistance.
• Rusty grain beetle resistance remains the most serious issue as it is not controlled by current label rates.
The abundance of strong resistance to phosphine in stored grain beetle pests on farms has decreased substantially since 2016, most probably due to improved hygiene on farms in anticipation of bumper harvests. The most common species detected with strong resistance to phosphine was LGB. There were no detections of strong resistance in FB populations collected from farms during 2021. The highest number of strongly resistant insect populations were detected in NSW while none were found in
Victoria.
If performed correctly, current fumigation label rates will control even strongly resistant populations of all stored grain beetle pests except RGB. Only one population of strongly resistant RGB was detected in on-farm storages in 2021. It is important that strong resistance, particularly in this species is controlled. If left unchecked, live insects might be detected in grain deliveries and subsequently rejected at delivery points.
| Lead research organisation |
Department of Primary Industries NSW |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC P-12121 |
| Trial funding source | New South Wales DPI |
| Trial funding source | Department of Agriculture and Fisheries (Queensland) (DAF QLD) |
| Trial funding source | DPIRD WA |
| Related program | N/A |
| Acknowledgments |
This work was part of the ‘National resistance monitoring for insect pests of stored grain’ project, P-12121, 2019–22, a joint investment by GRDC, NSW DPI, Department of Agriculture and Fisheries Queensland (DAF Qld), and Department of Primary Industries and Regional Development Western Australia (DPIRD WA). |
| Other trial partners | Not specified |
| Crop type | None: No crop specified |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Unknown |
| Sow date | Not applicable |
|---|---|
| Harvest date | Not applicable |
| Plot size | Not specified |
| Plot replication | Not specified |
| Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2022, available at |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to
construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol
16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
