Detection and Identification
Fall Armyworm is notorious for its ability to spread quickly and devastate crops, reproducing multiple generations within a single growing season. Early detection is critical in preventing widespread damage.
FAW larvae are the most destructive stage of the pest's lifecycle. Identifying the pest early can help target egg and larval stages before they mature and cause significant damage. However, accurate identification is essential, as FAW can be easily confused with other similar-looking species.
To aid farmers in correctly identifying FAW, the New South Wales Department of Primary Industries (NSW DPI) has developed a 3D identification model. This resource allows users to visually compare FAW to other species and is a valuable tool for farmers and agronomists.
Key Identification Features of FAW:
- Dark head with an inverted Y-shaped marking.
- Four distinctive spots arranged in a square on the second-to-last segment of the body.
- Striped body with a smooth texture.
Access the NSW DPI’s 3D model for a closer look at these identifying features.
Control Measures
Managing FAW infestations requires a timely and strategic approach. Control measures can be effective but may also be costly, especially if multiple treatments are needed throughout the season.
Consider the following steps when planning your response to FAW:
- Early Monitoring: Regularly inspect crops for signs of FAW damage, including leaf feeding and frass (insect droppings).
- Consult Agronomists: Engage with an experienced local agronomist familiar with FAW outbreaks in your region to assess the severity of the infestation and recommend appropriate treatments.
- Biological and Chemical Controls: Use a combination of control methods for the best results. Biological controls, such as natural predators, can help reduce FAW populations. Chemical controls should be applied carefully to minimise resistance and environmental impact.
It’s important to weigh the cost of applying pesticides against the potential yield loss. As FAW can produce multiple generations in a season, repeated treatments may be required. Farmers should evaluate whether the cost of control measures is justified based on the crop’s value and potential damage.
Resources and Support
Dairy NSW is committed to providing support and resources to help farmers manage the threat of Fall Armyworm.
Available Resources:
- NSW DPI 3D identification model.
- Pest management guides for forage crops.
- Economic tools to estimate the cost of control measures.
For tailored advice, reach out to your local Dairy NSW team member or consult with a trusted agronomist. Managing Fall Armyworm requires proactive monitoring, accurate identification, and informed decision-making. By staying vigilant and accessing available resources, NSW dairy farmers can better protect their crops and livelihoods.
