New paper out in *New Zealand Plant Protection* đŸ
Buddenhagen CE et al. (2026) report AHASâinhibitor herbicide resistance in recent Alopecurus myosuroides (blackâgrass) incursions into New Zealand.
Two incursionâlinked seed lots were tested. One showed very high resistance (>10Ă the label rate to achieve 90% control), while the other showed reduced sensitivity. This indicates that AHASâinhibitor herbicides should not be used for blackâgrass incursion responses in New Zealand.
Given the widespread evolution of resistance overseas, future incursions are increasingly likely to carry resistance traits. Strong border biosecurity, certified seed, avoiding seed from infested regions, and early resistance screening are critical.
https://doi.org/10.30843/nzpp.2026.79.11801
#WeedScience #HerbicideResistance #Biosecurity #BlackGrass #PlantProtection #NZScience #NZPPS