Russian wheat aphid action threshold calculator
This calculator helps farmers and agronomists determine whether to treat for Russian wheat aphid – it is based on the impact to crop yield and cost.
The calculator indicates if the economic injury level is likely to be exceeded between GS30 (start of stem elongation) and GS50 (start of head emergence). It therefore indicates if control of Russian wheat aphid should be actioned. This threshold can be applied to winter and spring cereal varieties.
A dataset complied during the GRDC investment UOA1805-018RTX 'Russian wheat aphid risk assessment' supported development of this calculator.
How to use the calculator
Before using the calculator, please read the instructions:
- Basis of the threshold
- Determining the action threshold
- Monitoring at GS30 (start of stem elongation)
- Estimating time between GS30 and GS50
Action threshold calculator
Attribution: The GRDC investment UOA1805-018RTX 'Russian wheat aphid risk assessment and regional thresholds’, investigated regional risk and management tactics for Russian wheat aphid (RWA). The project was led by the South Australian Research and Development Institute (SARDI) and undertaken in partnership with Cesar over 2018 to 2020.
Disclaimer: All persons involved in preparing this output, expressly disclaim all and any liability to any persons in respect of anything done by any such person in reliance, whether in whole or in part, on this output.
