We are now looking at stink bugs in soybeans. I’m seeing green and southern green, but brown stinkbugs can also be an issue. There are two thresholds we distinguish: Early and late reproductive growth stage. The best way to check is take a sweep net and sweep 25 times. I’m seeing lots of immature stink bugs. Here is a Redbanded stink bug Dr. Roberts helped me identify. These are seen here but mostly a problem in Louisiana and Mid-South states.
- Bloom to Mid Pod-Fill: 3 stink bugs in 25 sweeps OR 0.33 stink bugs per 1 foot row.
- After Mid Pod-Fill: 6 stink bugs in 25 sweeps OR 1 stink bug per 1 foot row.
The separating line for threshold is going to be drawn around R4 & R5. R4 is when ponds begin to elongate. At R5 or beginning seed, you can feel the seed in the pod. Here is a chart of soybean reproductive growth stages: