No moths have been found in Northland traps this week, however larvae of varying stages of development are present in maize crops. Fall armyworm has also been confirmed on a maize crop in Takaka.
Key Points:
- Fall armyworm confirmations have been updated this week but do not include regions affected by Cyclone Gabrielle, as events and response surrounding the cyclone have taken priority.
- No moths have been found in Northland traps this week but larvae of varying stages of development (instars) are present in maize crops.
- There have been multiple reports of fall armyworm larvae still being parasitised by the parasitic wasp Cotesia sp. Hopefully this can make a dent in fall armyworm populations.
- Since September 1 2022, there have been 119 confirmed fall armyworm finds (this is the number of properties where the pest has been found, not the number of insects found).
- Maize and sweet corn crops in areas not affected by the cyclone should be scouted where possible and when safe to do so.
- Fall armyworm has been confirmed on a maize crop in Takaka. Other established noctuids (the family of moths fall armyworm belongs to) continue to be present in some South Island regions.
- The insecticide Sparta™ is on label for control of fall armyworm on maize and sweetcorn crops.
- We are still in a response. All finds must be reported to MPI via the website here or by calling 0800 80 99 66
- There are no negative consequences to growers for reporting, as this pest will not be controlled by removing crops.
Please contact your local advisor for details on the safe use of this or any other insecticides on maize or sweetcorn.
Thresholds of economic damage:
For the latest identification guides click here and MPI Website here, or contact Ivan Lawrie ivan.lawrie@far.org.nz
For other useful tools and guides on detection and identification, consult the FAR website.