K-State Research and Extension news service
In this video, K-State Extension weed specialist Dallas Peterson outlines research aimed at better understanding how dicamba drift affects non-dicamba-resistant soybeans, particularly during sensitive growth stages.
Peterson said the study involved applying dicamba at three simulated drift rates — 1/1000, 1/500 and 1/100 of a standard field use rate — during key points in soybean development.
Results showed that timing and exposure level play a significant role in yield response. “With the V3 applications, we actually saw very little yield loss, regardless of application rate”, Peterson said. “As we got into the R1 and R3 timings (reproduction stages), we saw more yield loss, especially at the 1/100 use rate.”
He added that repeated exposure compounded the damage.
K-State Research and Extension video by Dan Donnert
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