Adult wheat stem sawflies emerging in Nebraska
Based on your scouting results, you may want to consider one of the following management options:
- Do nothing. You may not need to take any action if 1) you do not have a history of lodging in this field; 2) the infested area is small; or 3) your yield expectations are low in the sampled area.
- Swath harvest. Swathing equipment might be hard to come by, but you could swath and windrow your wheat while it is still somewhat green at the end of June. Doing so would cut the wheat before the sawfly has a chance to cut it.
- Get low. Harvest at a normal time with a low-cutting, floating-head combine. However, this harvesting method may not be compatible with some residue-management operations.
I’m providing these management options now as some of these may require more time to plan than conventional insecticide management options.
We continue to monitor the statewide status of this quickly evolving pest. Additionally, we are working with a company to provide producers a pheromone and a trap design that may save time in scouting. We hope to be able to produce a higher resolution map of the prevalence of this insect with the aid of the pheromone-based traps.
Once the adults die, I will provide additional sampling plans in CropWatch that will be specific to larvae.