However, this value is likely much higher in R6 than in earlier growth stages. Complicating matters is the fact that the duration of soybean aphid populations and their impacts on yield are less ...

“Most years, with June 1 planting, the 3.5-to-4.1-maturity soybeans would have outperformed earlier-maturing varieties because they take longer to reach the end of the R6 stage,” Ferrie says.

This is when the sexual stage for the soybean aphid occurs ... very large aphid populations can cause yield losses to R6 soybeans into September. Disease: Fungal diseases can cause rapid aphid ...