We are currently doing a trial for Hairy Feeabane control (Conyza bonariensis) with several combinations and wanted to share some preliminary results. Application was done last March 22 when the weeds were approximately 0.5-3” diameter and burn down activity was evaluated 5 days after treated (5DAT). We are sharing the first evaluation with you since the weed is abundant at this time in the Yuma Mesa. This is the initial evaluation, so mortality and final control will be rated later.
In recent conversations with PCAs we talked about Rely (glufosinate) activity and they have seen good performance of the product especially when weeds are small and according to some researchers this product’s works better with high relative humidity¹ (Tickes 2010).
This preliminary data shows that Rely and Sharpen both wit AMS (Ammonium Sulfate) and MSO (Methilated Seed Oil) appeared effective at the 5DAT evaluation. There are other PPO herbicides that we are testing like UA850 that looks promising in some combinations such as the combination with Roundup+AMS+MSO. More details will be shared at a later date when additional data is collected.

References: 

1. The influence of temperature and relative humidity on the efficacy of glufosinate-ammoniumD. M. ANDERSON,C. J. SWANTON,J. C. HALL,B. G. MERSEY First published: April 1993