Plant pulling can substantially reduce ryegrass persistence on some light ash soils, or those with a peat, sand or pumice content. Large differences in plant pulling exist between cultivars.
Extreme with either AR1 or AR37 endophyte, Ultra AR1 and Revolution AR1 have shown significantly higher levels of plant pulling.
Combined trial results
Below are the combined results from the 22 scores of plant pulling from eight AYT's. Plant pulling has shown up particularly badly in the Waikato and Taranaki trials.