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eturn to table of contents Waterhemp control with two-pass herbicide programs, Marion, IA, 2016. Waterhemp resistant to glyphosate, ALS, and POST-applied PPO herbicides. Untreated DuPont Envive ® herbicide fb Roundup PowerMAX herbicide + Prefix ® herbicide 14 DAT POST (June 22) 28 DAT POST (July 6) 14 DAT POST (June 22) 28 DAT POST (July 6) DuPont Enlite ® herbicide fb Roundup PowerMAX ® herbicide DuPont Envive herbicide fb Roundup PowerMAX herbicide 14 DAT POST (June 22) 28 DAT POST (July 6) 14 DAT POST (June 22) 28 DAT POST (July 6) DuPont Enlite herbicide fb Roundup PowerMAX herbicide + DuPont FeXapan herbicide plus VaporGrip Technology DuPont Envive herbicide fb Roundup PowerMAX herbicide + DuPont FeXapan herbicide plus VaporGrip Technology 14 DAT POST (June 22) 28 DAT POST (July 6) 14 DAT POST (June 22) 28 DAT POST (July 6) DuPont Enlite herbicide fb Roundup PowerMAX herbicide + DuPont FeXapan herbicide plus VaporGrip Technology + DuPont Cinch ® herbicide DuPont Envive herbicide fb Roundup PowerMAX herbicide + DuPont FeXapan herbicide plus VaporGrip Technology + DuPont Cinch herbicide 14 DAT POST (June 22) 28 DAT POST (July 6) 14 DAT POST (June 22) 28 DAT POST (July 6) 148

eturn to table of contents Central Locations Table 5. PRE and POST herbicide treatments used at central locations. TRT PRE Herbicide PRE Rate (per acre) POST Herbicide* POST Rate (per acre) 1 DuPont Roundup PowerMAX Herbicide (RUPM) 22 oz 2 Enlite ® Herbicide 3.5 oz RUPM + FeXapan † 22 oz + 22 oz 3 RUPM + FeXapan † + Cinch ‡ 22 oz + 22 oz + 1 pt 4 RUPM 22 oz 5 DuPont RUPM + FeXapan † 22 oz + 22 oz 6 Envive ® 2.8 oz RUPM + FeXapan † 22 oz + 22 oz Herbicide + Cinch ‡ + 1 pt 7 RUPM + Prefix ® Herbicide 2 pt 8 Untreated * POST timing: 2-4 inch weeds. Applied as tank mix in this research study. Approved dicamba tank mixes have not been finalized at this time. † DuPont FeXapan herbicide plus VaporGrip Technology. ‡ DuPont Cinch herbicide. Northern Locations Table 7. PRE and POST herbicide treatments used at northern locations. TRT PRE Herbicide PRE Rate (per acre) POST Herbicide* POST Rate (per acre) 1 Roundup PowerMAX DuPont (RUPM) 22 oz 2 Enlite 3.5 oz RUPM + FeXapan † 22 oz + 22 oz Herbicide 3 RUPM + FeXapan † + Cinch ‡ 22 oz + 22 oz + 1 pt 4 RUPM 22 oz 5 RUPM + FeXapan † 22 oz + 22 oz DuPont Afforia 2.8 oz RUPM + FeXapan 6 † 22 oz + 22 oz Herbicide + Cinch ‡ + 1 pt RUPM + Prefix 7 2 pt Herbicide 8 Untreated * POST timing: 2-4 inch weeds. Applied as tank mix in this research study. Approved dicamba tank mixes have not been finalized at this time. † DuPont FeXapan herbicide plus VaporGrip Technology. ‡ DuPont Cinch herbicide. Table 6. Efficacy of weed control treatments at central locations. Data from locations in NE, MD, IL, and IA. Palmer amaranth at 2 locations, waterhemp at 2 locations. PRE Herbicide DuPont Enlite Herbicide DuPont Envive Herbicide POST Herbicide* Palmer Amaranth ▲ At POST 28 DAT 42 DAT Waterhemp ▲ At 28 POST DAT 42 DAT Roundup PowerMAX (RUPM) herbicide 98 97 95 78 45 41 RUPM + FeXapan † 98 100 100 73 92 89 RUPM + FeXapan † + Cinch ‡ 98 100 100 42 95 94 RUPM 98 93 93 40 38 36 RUPM + FeXapan † 97 99 99 27 85 82 RUPM + FeXapan † + Cinch ‡ 96 99 99 48 92 90 RUPM + Prefix 97 97 95 33 65 51 ▲ Glyphosate and ALS resistant, 1 POST PPO-resistant waterhemp location. * Applied as a tank mix in this research study. Approved dicamba tank mixes have not been finalized at this time. † DuPont FeXapan herbicide plus VaporGrip Technology. ‡ DuPont Cinch herbicide. Table 8. Efficacy of weed control treatments at northern locations. Data from locations in NE and MN. Waterhemp at 2 locations. PRE Herbicide DuPont Enlite Herbicide DuPont Afforia Herbicide POST Herbicide* At POST Waterhemp ▲ 14 DAT 28 DAT 42 DAT Roundup PowerMAX (RUPM) 98 100 97 94 RUPM + FeXapan † 98 100 98 98 RUPM + FeXapan † + Cinch ‡ 98 100 98 98 RUPM 98 100 98 96 RUPM + FeXapan † 98 100 98 98 RUPM + FeXapan † + Cinch ‡ 98 100 98 97 RUPM + Prefix ® herbicide 98 100 98 98 ▲ Glyphosate and ALS resistant, 1 POST PPO-resistant waterhemp location. * Applied as a tank mix in this research study. Approved dicamba tank mixes have not been finalized at this time. † DuPont FeXapan herbicide plus VaporGrip Technology. ‡ DuPont Cinch herbicide. CROP RESPONSE • Low crop response (90% early season Palmer amaranth and waterhemp control, reducing weed density for POST treatments. • DuPont FeXapan herbicide plus VaporGrip technology boosted control to 95%+ with excellent crop tolerance. • Addition of DuPont Cinch herbicide POST provided additional residual control through canopy closure. CONCLUSIONS • 2-pass herbicide programs that include DuPont enhanced PRE products followed by timely POST applications of DuPont FeXapan herbicide plus VaporGrip Technology provide growers with excellent Palmer amaranth and waterhemp control. • Residual control can be further extended with the addition of a product like DuPont Cinch herbicide applied at POST timing. 149

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