Russian Wheat Aphid (RWA) outbreak in Australia - Dow AgroSciences Information Update
- Transform™ Isoclast™ active is an outstanding selective and translocated aphicide (insecticide)
- Dow AgroSciences has conducted no biology work on the Russian wheat aphid (RWA) biotype currently discovered in Australia
- Transform Isoclast active has no or limited impact upon most beneficial insects and is well suited to use in Integrated Pest Management programmes
- Transform Isoclast active has been trialed in the USA and has demonstrated efficacy on this pest; however, as yet label rates have NOT been confirmed
- Dow AgroSciences will in due course conduct trial work to determine the rate of Transform WG and Cobalt Advanced required to control this RWA biotype in Australia under Australian conditions
- Dow AgroSciences will be talking to the relevant authorities about an emergency Permit application to allow use of Transform WG Isoclast active and Cobalt Advanced for control of this pest
- Trial work conducted by Dow AgroSciences in the USA suggests that of the currently registered products for RWA control, Lorsban is the most effective product on RWA followed closely by Cobalt Advanced
- US trial work used a Crop Oil Concentrate with a number of the insecticides
- Dow AgroSciences has concerns about crop effects with Lorsban at 1.2L/ha + Li700
- Regardless of the insecticide used, spray coverage will be crucial to achieve the best result
- Water rates must be high enough to ensure adequate leaf coverage of the crop
- Russian wheat aphid tends to curl the leaves of affected plants so this WILL impact upon coverage as the leaf surface is significantly reduced
11.Indications from abroad are that use very early in the crop (prior to leaf curl) gives better results
This information sheet does NOT constitute specific RECOMMENDATIONS for control of RWA.
In the absence of local data on this pest, Dow AgroSciences SUPPORTS SARDI and the relevant government authorities currently recommending 1.2 L/ha of a 500 gai/L chlorpyrifos based product such as Lorsban™ 500 EC to manage this pest infestation on their property.
As more relevant data becomes available and/or permits for use of products containing active ingredients other than chlorpyrifos become available, then that information will be communicated.