We investigated Waterlogging under field conditions delayed the growth process of summer maize, resulted in a significant reduction of grain yield.

Exogenously applied 6-BA effectively alleviated the adverse effects of water logging in summer maize by delaying leaf senescence, increasing chlorophyll content, improving photosynthetic performance.

The third-leaf growth stage was the appropriate growth stage at which exogenously applied 6-BA effectively alleviated the adverse effects of waterlogging in summer maize.