Lentils
Biomass
There was no significant effect to biomass yields from any herbicide treatments applied to GIA1703L. The same was observed for PBA Hallmark XT with the exception being the Reflex® @ 500mL/ha treatment being significantly higher than the other treatments. This is possibly due to it being one of two treatments that didn’t have vetch seed sown and might have had less competition, however this was not replicated in the Reflex® @ 1000mL/ha treatment.
Yield
Yield data showed a significant yield increase (0.6t/ha) of growing PBA Hallmark XT over GIA1703L (p=0.001, LSD=0.17, CV=20.6). This is no surprise as often when a new variety is released with a novel herbicide tolerance there is generally a yield penalty, but as the breeding advances the yield of future varieties with these herbicide tolerances is likely to improve. It’s important to remember this variety has a fit where there are clopyralid residues that would cause yield penalties in other lentil varieties. Within each variety there was a significant benefit from using any herbicide treatment over untreated, however no particular treatment significantly out yielded another.
Field peas
Biomass
No significant effect on biomass was noted from the use of any herbicides on GIA Ourstar, however Ally soil residue and the metribuzin PSPE treatments on PBA Wharton displayed a significant reduction in biomass.
Yield
There was no significant yield improvement or penalty from using any herbicides on GIA Ourstar, however treatments on PBA Wharton displayed similar trends to the biomass data where a significant yield penalty was observed from using metribuzin PSPE and Ally soil residue. The Ally is off-label and therefore no surprise and the metribuzin treatment is on-label but also not unexpected as growers at times experience yield penalties from using it.