Figure 6.

The extent of mycotoxin contamination in harvested maize grains for the seed mixture (DBN9936, Panel a) or block refuge field trials (Ruifeng 125, Panel b). Per year, mycotoxin titres are averaged across all locations and plotted against non‐Bt maize coverage rate for seed mixture (a) and block refuge (b). Dashed lines indicate the established WHO thresholds of fumonisin, i.e. 4 mg/kg in unprocessed maize grain. Mycotoxin data from block refuges in Guizhou from 2020 were not included in the analysis due to its extremely high dose. Error bars are only shown in an upwards direction.