EC Nebraska | MS Dirty - 10/5/2016 21:05
I'm. It saying it won't effect you where you're at.... Different insects have different impacts on crop by region, just like you guys have corn root worm problems and we normally don't. Not sure why, we have the adults, but they just don't.
They are here, just don't seem to hurt us on yield, at least not that we know of.
Do you actually have the soybean biotype, or just the original sunflower type? Are you actually seeing larvae in the soybean stems? I'm surprised you could have significant soybean larvae and NOT see yield impact.
To clarify, Dectes is a native insect, normally a pest of sunflower, cocklebur, and ragweed type plants. It's range is widespread across the US east of the Rockies. Historically it did not attack soybeans. Since the year 2000, populations have been identified that have switched to include soybeans as host. These populations are spreading, but do not yet include the majority of the historic range of the insect.
So it is possible you could have Dectes adults in soybean fields, particularly if those fields have giant ragweed or sunflower weeds, that are not actually the soybean biotype and are not actually feeding on the soybeans. You would need to actually find the larvae in the soybean stems to confirm that you have soybean biotype.
|
Dectes Stem Borer in Southern Indiana
