Soil Moisture: Moist Emergence Date: 13/May/2003. Pest Description Pest 1 Type: W Code: ABUTH Abutilon theophrasti Common Name: Velvetleaf

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1 Trial ID: CN Glyph Prod 03 Study Director: Location: Ashland Otto East Investigator: David L Regehr Crop Description Crop 1: ZEAMX Zea mays Corn Variety: Asgrow RX718RR : BCOR Planting Date: 6/May/2003 Planting Method: White 6700 Rate, Unit: S/A Depth, Unit: 1.5 in Row Spacing, Unit: 30 in Seed Bed: Good Soil Temperature, Unit: 62 F Soil Moisture: Moist Emergence Date: 13/May/2003 Pest Description Pest 1 Type: W Code: ABUTH Abutilon theophrasti Common Name: Velvetleaf Pest 2 Type: W Code: AMAPA Amaranthus palmeri Common Name: Amaranth, Palmer Pest 3 Type: W Code: DIGSA Digitaria sanguinalis Common Name: Crabgrass, large Pest 4 Type: W Code: HELAN Helianthus annuus Common Name: Common sunflower Description: domestic oil-seed sunflower Pest 5 Type: W Code: IPOHE Ipomoea hederacea Common Name: Morningglory, ivyleaf Pest 6 Type: W Code: SORBI Sorghum bicolor Common Name: Rox orange forage sorghum Description: shattercane mimic Site and Design Plot Width, Unit: 6.67 FT Site Type: cropland Plot Length, Unit: 25 FT Tillage Type: conventional Replications: 3 Study Design: Factorial Trial Initiation Comments: Previous Crops Previous Pesticides Year 1. grain sorghum 2002 Field Prep./Maintenance: fall chisel; spring disk; spring field cultivate Soil Description % Sand: 14 % OM: 2.3 Texture: Silt loam % Silt: 62 ph: 6.3 Soil Name: Reading % Clay: 24 CEC: 18 Fert. Level: good

2 Application Description A Application Date: 10/Jun/2003 Time of Day: 5:30 pm Application Method: BRDCST Application Timing: MP Application Placement: FOLIAR Applied By: C. MINIHAN Air Temperature, Unit: 85 F % Relative Humidity: 45 Wind Velocity, Unit: 2 N Dew Presence (Y/N): N Water Hardness: City H20 Soil Temperature, Unit: 83 F Soil Moisture: ADEQUATE % Cloud Cover: 70 Crop Stage At Each Application A Crop 1 Code, : ZEAMX BCOR Stage Scale Used: BBCH Stage Majority, Percent: 4LF 4CL 100 Height, Unit: 15 IN Pest Stage At Each Application A Pest 1 Code, Disc., Scale: ABUTH W. Stage Majority, Percent: 4-5LF 100 Height, Unit: 7 IN Pest 2 Code, Disc., Scale: AMAPA W. Stage Majority, Percent: 16 IN 100 Height, Unit: 16 IN Pest 3 Code, Disc., Scale: DIGSA W. Stage Majority, Percent: TILL 100 Height, Unit: 3 IN Pest 4 Code, Disc., Scale: HELAN W. Stage Majority, Percent: 6-8 LF 100 Height, Unit: 12 IN Pest 5 Code, Disc., Scale: IPOHE W. Stage Majority, Percent: 4 LF 100 Height, Unit: 4 IN Pest 6 Code, Disc., Scale: SORBI W. Stage Majority, Percent: 4-6 IN 100 Height, Unit: 6 IN Application Equipment A Appl. Equipment: TRACTOR Operating Pressure: 20 Pressure Unit: PSI Nozzle Type: TURBO TEE Nozzle Size: Nozzle Spacing, Unit: 20 IN Boom Length, Unit: 6.67 FT Boom Height, Unit: 32 IN Ground Speed, Unit: 4.1 MPH Carrier: Water Spray Volume: 15 Volume Unit: GAL/AC Propellant: Comp. Air

3 Trial ID: CN Glyph Prod 03 Location: Ashland Otto East Study Director: Investigator: David L Regehr Trial Comments This factorial experiment compared ten glyphosate products for control of weed species with differing susceptibility. All products were applied at rates of 0.5, 0.25, and lb acid equivalent/acre. For glyphosate products formulated as 4 lb/gal isopropyl amine salts (containing 3 lb/gal acid), the product rates were 1.33 pt, 0.67 pt, and 0.33 pt/acre for 0.5, 0.25, and lb/acre acid, respectively. Products such as Roundup UltraMax and WeatherMax, containing higher concentrations of glyphosate acid, were applied at correspondingly lower rates of product. TECH is a dry formulation containing 96.7% glyphosate acid. All treatments were applied in 15 gal/acre water conditioned with ammonium sulfate, except for "N-Tank" in tmt #2 which already contained a water conditioner. As the rates of glyphosate product were reduced, Activate Plus, a non-ionic surfactant, was added to bring the surfactant load up to that of the 0.5 lb acid/acre rate. The front half of each plot was broadcast overseeded with large crabgrass (DIGSA) and Palmer amaranth (AMAPA). At application time, modest densities of 16-inch tall amaranth were over-topping 3-inch tall crabgrass. Velvetleaf (ABUTH), ivyleaf morningglory (IPOHE), rox orange forage sorghum (SORBI), and domestic sunflower (HELAN) were planted in rows across the rear half of the plots. They were not subject to over-topping, and spray coverage was excellent. Weed control was rated at 1, 2, 4, and 11 weeks after treatment. All ratings were done "blind" without knowledge of glyphosate product or rate. The accompanying data columns show the average (mean) of the first three ratings. The 11-week rating was not averaged in, as it was somewhat compromised by weed stress and death because of late-season water shortage. The factorial analysis showed no main effect (glyphosate product x rate) interactions. The table of B means shows significant effects of glyphosate rates in every rating for every weed. The weed with the least response to glyphosate rate was sunflower. This species is highly sensitive to glyphosate, and the 97% control with 0.5 lb acid was not significantly different from the 95% control with 0.25 lb acid. At lb acid, sunflower control dropped to 90%. The other weed with only modest response to glyphosate rate was rox orange forage sorghum (simulating shattercane). The weed with the greatest response to glyphosate rate was ivyleaf morningglory. For this species, even the highest rate used in this study might be considered marginal. Higher rates of glyphosate, or addition of tank-mix partners, are needed for morningglory control. The composite table of A means shows very few significant weed control differences attributable to glyphosate products. In the composite ratings, rox orange control was less with Clearout 41 Plus and Glyphomax Plus. In the individual rating dates (data not shown), there were no significant (<0.05 probability) glyphosate product main effects on crabgrass, ivyleaf morningglory, rox orange and sunflower. The tables of A means for individual ratings showed several glyphosate product main effects. For instance, at 1 week after treatment (WAT), Touchdown and Glystar Plus showed less Palmer amaranth control than the other products. At the 2 WAT rating, and thereafter, these differences were gone. Similarly, at 1 WAT, Touchdown and GF887 showed less velvetleaf control than the other products, but these differences were also gone by the next rating.

4 Trial ID: CN Glyph Prod 03 Location: Ashland Otto East Study Director: Investigator: David L Regehr Trt Treatment Other Other 1 Clearout 41 Plus 87 ab 90 ab 80 ab 96 a 96 a-d 98 a 2 Clearout 41 Plus 79 a-e 88 ab 71 b-f 87 a-d 89 a-h 95 ab 3 Clearout 41 Plus 67 c-f 72 c-f 61 e-i 76 ef 85 fgh 88 b 4 TECH Acid + N-Tank 90 a 90 ab 83 a 96 ab 97 ab 97 a No ammonium sulfate 5 TECH Acid + N-Tank 81 a-e 86 ab 72 b-e 91 a-d 92 a-g 96 ab No ammonium sulfate 6 TECH Acid + N-Tank 59 f 66 f 54 i 72 f 83 h 88 b No ammonium sulfate 7 RU WeatherMax 89 a 91 a 78 abc 94 abc 98 a 98 a 8 RU WeatherMax 84 abc 84 abc 71 b-f 86 bcd 94 a-f 97 a 9 RU WeatherMax 73 a-f 76 b-f 61 e-i 75 ef 88 b-h 91 ab 10 Roundup Original + NIS 89 a 90 ab 81 ab 93 abc 97 abc 97 a Activate Plus 11 Roundup Original + NIS 84 abc 84 abc 71 b-f 86 bcd 94 a-f 95 ab Activate Plus 12 Roundup Original + NIS 74 a-f 72 c-f 60 ghi 72 f 90 a-h 92 ab Activate Plus 13 RU UltraMax 89 a 93 a 81 ab 95 abc 97 ab 98 a 14 RU UltraMax 77 a-e 84 abc 72 b-e 87 a-d 94 a-g 95 ab

5 Trt Treatment Other Other 15 RU UltraMax 72 a-f 79 a-e 62 e-i 76 ef 92 a-g 92 ab 16 Glyphomax Plus 87 ab 90 ab 79 ab 94 abc 94 a-f 98 a 17 Glyphomax Plus 81 a-e 81 a-d 70 b-f 86 bcd 93 a-g 96 ab 18 Glyphomax Plus 64 def 69 def 58 ghi 76 ef 83 h 91 ab 19 Touchdown 89 a 89 ab 76 a-d 91 a-d 97 ab 95 ab 20 Touchdown 77 a-e 82 abc 68 c-g 83 de 92 a-g 96 ab 21 Touchdown 68 c-f 67 ef 56 i 72 f 85 gh 89 ab 22 Glyph-K (Syngenta) 89 a 94 a 80 ab 93 abc 96 a-d 98 a 23 Glyph-K (Syngenta) 81 a-e 81 a-d 67 d-h 86 bcd 90 a-h 92 ab 24 Glyph-K (Syngenta) 69 b-f 72 c-f 59 ghi 72 f 87 d-h 91 ab 25 Glystar Plus 86 ab 90 ab 77 a-d 92 a-d 96 a-d 97 a 26 Glystar Plus 79 a-e 82 abc 71 b-f 85 cd 95 a-e 96 ab 27 Glystar Plus 64 ef 71 c-f 61 f-i 76 ef 86 e-h 90 ab 28 GF887 (Glyph HC 5.4) 86 ab 91 a 81 ab 94 abc 95 a-e 97 a 29 GF887 (Glyph HC 5.4) 82 a-d 87 ab 72 b-e 87 a-d 93 a-g 96 ab 30 GF887 (Glyph HC 5.4) 65 def 72 c-f 57 hi 72 f 87 c-h 91 ab LSD (P=.05) CV Means followed by same letter do not significantly differ (P=.05, Student-Newman-Keuls)

6 Trial ID: CN Glyph Prod 03 Location: Ashland Otto East Study Director: Investigator: David L Regehr Trt Treatment Other Other TABLE OF R MEANS Replicate Replicate Replicate TABLE OF A MEANS 1 Clearout 41 Plus TECH Acid + N-Tank No ammonium sulfate 3 RU WeatherMax Roundup Original + NIS Activate Plus 5 RU UltraMax Glyphomax Plus Touchdown Glyph-K (Syngenta) Glystar Plus GF887 (Glyph HC 5.4) TABLE OF B MEANS TABLE OF AB MEANS 1 Clearout 41 Plus TECH Acid + N-Tank No ammonium sulfate 1 3 RU WeatherMax Roundup Original + NIS Activate Plus 1 5 RU UltraMax Glyphomax Plus

7 Trt Treatment Other Other 7 Touchdown Glyph-K (Syngenta) Glystar Plus GF887 (Glyph HC 5.4) Clearout 41 Plus TECH Acid + N-Tank No ammonium sulfate 2 3 RU WeatherMax Roundup Original + NIS Activate Plus 2 5 RU UltraMax Glyphomax Plus Touchdown Glyph-K (Syngenta) Glystar Plus GF887 (Glyph HC 5.4) Clearout 41 Plus TECH Acid + N-Tank No ammonium sulfate 3 3 RU WeatherMax Roundup Original + NIS Activate Plus 3 5 RU UltraMax

8 Trt Treatment Other Other 6 Glyphomax Plus Touchdown Glyph-K (Syngenta) Glystar Plus GF887 (Glyph HC 5.4)

9 Trial ID: CN Glyph Prod 03 Location: Ashland Otto East Study Director: Investigator: David L Regehr FACTORIAL/POOLED ERROR AOV For W Weed DIGSA mean of 3 CONTRO T1 Total R A B AB ERROR FACTORIAL/POOLED ERROR AOV For W Weed AMAPA mean of 3 CONTRO T4 Total R A B AB ERROR FACTORIAL/POOLED ERROR AOV For W Weed IPOHE mean of 3 CONTRO T6 Total R A B AB ERROR FACTORIAL/POOLED ERROR AOV For W Weed ABUTH mean of 3 CONTRO T8 Total R A B AB ERROR FACTORIAL/POOLED ERROR AOV For W Weed SORBI mean of 3 CONTRO T10 Total R A B AB ERROR FACTORIAL/POOLED ERROR AOV For W Weed HELAN mean of 3 CONTRO T11 Total R A B AB ERROR Column 1: T1 = ([2]+[9]+[15])/3 Column 2: T4 = ([3]+[10]+[16])/3 Column 3: T6 = ([4]+[11]+[17])/3 Column 4: T8 = ([5]+[12]+[18])/3 Column 5: T10 = ([6]+[13]+[19])/3 Column 6: T11 = ([7]+[14]+[20])/3