Fig. 2.

Correlation of spray dose of glyphosate, severity of leaf rust (%), and systemic concentration of glyphosate in the inoculated leaf of GR wheat cv. Ingot. Roundup WeatherMAX (0.11–0.84 kg ae/ha, 1/8× to 1×) containing [¹⁴C]glyphosate was sprayed 1 DBI onto plants with one mature leaf shielded from the spray. The shielded leaf was inoculated with leaf rust spores 1 day later, and leaf rust severity was rated 11 DAI. Systemic glyphosate concentration (μg/g fresh weight) in the inoculated leaf was determined by radioactivity 0 or 12 DAI.