Two Insect-resistant Maize Events Reduce Fumonisin Pollution in China

ISAAA April 16, 2025

A study conducted by researchers from China showed that two genetically modified (GM) insect-resistant maize events, CM 8101 and Reuifeng 8, reduced fumonisin pollution under the stress of Lepidopteran insects (Ostrinia furnacalis and Helicoverpa armigera).

China, the world's second-largest maize producer, faces widespread fumonisin contamination caused by Fusarium spp. Fumonisins affect over 80% of corn-producing areas, with higher pollution levels seen in regions like Zhuozhou due to favorable conditions for fungal growth. Field trials from 2018-2019 showed that planting insect-resistant maize hybrids significantly reduced fumonisin levels.

In this study, the results showed that the total amount of fumonisin in Bt maize decreased significantly under the stress of Lepidopteran insects. The study confirmed that Bt maize with two insect-resistant transgenic events could reduce fumonisin pollution by over 70%. The researchers concluded that CM 8101 and Ruifeng 8 have the potential to significantly reduce the pollution levels in field crops in China.

For more information, read the study from GM Crops & Food.