Fig. 4.

Field evaluation of the effect of glyphosate treatment on stripe rust (P. striiformis f. sp. tritici) in GR wheat cv. Macon from natural inoculum near Pullman, WA. Roundup Ultra (0.42–1.26 kg ae/ha, 0.5× to 1.5×) was sprayed preinfestation on May 19, 2004 and/or postinfestation on June 30, 2004. Rust symptoms first appeared on June 25, 2004. Stripe rust incidence based on AUDPC was calculated from ratings on July 2nd, 8th, and 12th. The y axis describes rust severity (1–9) from July 12th.