A major concern in lowering these thresholds is that more unnecessary spraying will take place. Unfortunately, most stink bug sprays are made without proper scouting, often applied too late to reduce economic injury (typically tank mixed with a fungicide at tasseling), and without adequate coverage near the ear zone. These unneeded or poorly targeted sprays are wasted money to the grower and could create resistance issues in the future. Stink bugs tend to infest field edges, so it’s easy to get excited if scouting is done with a quick trip out of and back into the pickup cab. We still anticipate that, even with these threshold modifications, most corn fields will not exceed the economic threshold if they are properly scouted. Refer to the information on our website for our scouting recommendations. Bifenthrin is the most effective registered insecticide. Using off-label insecticides on corn is unneeded and illegal.
Read more at: https://corn.ces.ncsu.edu/2020/05/important-changes-for-stink-bug-thresholds-in-corn-for-2020/