| Table 2. Preplant/preemergence herbicides for corn | ||
| Aatrex/Atrazine | 2.2 lba | EPP, PPSA, PPI, PRE, EPOST |
| Axiom | 8–15 oza | EPP, PPSA, PPI, PRE |
| Axiom AT | 1.5–4 lb/aa | EPP, PPSA, PPI, PRE |
| Balance Pro | 1.9–3.8 oza | PPSA, PPI, PRE |
| Do not use where water table is within 25 feet on loamy sand or sandy loam and soil organic matter is less than 2% or on coarse soils with soil organic matter less than 1.0%. On medium soils with pH >7.5, reduce rate by 0.25 oz/a from recommended rate. | ||
| Bicep II Magnum | 1.3–2.6 qta | EPP, PPSA, PPI, PRE, POST |
| Bicep Lite II Mag. | 0.9–2.2 qta | EPP, PPSA, PPI, PRE, POST |
| Bullet/Lariat | 3–3.5 qta | PPSA, PRE |
| Callisto | 6 oza | PPSA, PRE |
| Define | 12–20 oza | PPSA, PPI, PRE |
| Degree | 2.3–4.0 pta | EPP, PPSA, PPI, PRE, POST |
| Degree Xtra | 2.7–3.5 qta | EPP, PPSA, PPI, PRE, POST |
| Dual II Magnum | 1–1.7 pta | EPP, PPSA, PRE, POST |
| Dual IIG Magnum | 6–12 lba | EPP, PPSA, PRE, POST |
| EPIC | 11–15 oza | EPP, PPSA, PPI or PRE |
| Use low rates for soils with pH equal to or greater than 7.4 or with less than 1.0% organic matter. | ||
| Eradicane | 4.75–5 pta | PPI |
| Fultimea | 2.5–3.5 qta | EPP, PPSA, PRE |
| Guardsman/LeadOff | 2.5–4.5 pta | PPSA, PRE, PPI, EPOST |
| Guardsman Max | 2.5–4.5 pta | PPSA, PRE, PPI, EPOST |
| Harnessa | 1.25–2.25 qta | PPSA, PRE, EPOST |
| Harness Xtraa | 1.8–2.3 qta | PPSA, PRE, EPOST |
| Hornet WDG | 4.0–5.0 oza | PPSA, PRE, EPOST |
| Lasso II | 17–20 lba | PPSA, PRE, EPOST |
| Do not use on soils with less than 1.0% organic matter. | ||
| Micro Tech/Lasso | 2–3 qta | PPSA, PRE, EPOST |
| Outlook 10-18 oza | PPSA, PPI, PRE, EPOST | |
| Prowl/Pendimax | 1.8 qt | PRE |
| Do not use on soils with less than 1.0% organic matter. Do not incorporate. | ||
| Python | 0.8–1.33 oza | PPSA, PPI, PRE |
| Surpassa | 1.5–2.5a | PPSA, PRE, EPOST |
| TopNotch | 2–3 qta | PPSA, PRE, EPOST |
| aRates dependent on soil type and application type and application type. | ||
| bDo not use on sandy soil if water table is shallower than 30 feet. | ||
New options for controlling seedling insects and corn rootworms (tables)
| Table 1. Wireworm study, Emerson, NE, 2001; Plant population per 30 ft of row, June 22 (K. Jarvi) | ||||
| Treatment method | Application or amount ai | Rate of product | Plant population | |
| Gaucho | ST | 0.165 mg ai/kernel | 36.25 a | |
| Warrior T | IF MT | 1 oz/acre | 36.25 a | |
| Force 3 G | IF | 3 oz/1000 ft of row | 36.25 a | |
| Cruiser (Adage) 5 FS | ST | 200g ai/100 kg seed | 35.25 a | |
| Aztec 4.67 G | IF | 2.25 oz/1000 ft of row | 35.00 ab | |
| Clothianidin | ST | 0.25 mg ai/kernel | 34.75 ab | |
| Cruiser (Adage) 5 FS | ST | 50 g ai/100 kg seed | 34.75 ab | |
| Fortress 5 G | IF | 3 oz/1000 ft of row | 34.00 abc | |
| Capture 2 EC | IF MT | 0.15 oz ai/1000 ft of row | 32.75 abcd | |
| Pounce 3.2 EC | IF MT | 2 oz/acre | 32.50 abcd | |
| Pounce 3.2 EC | 4 oz/acre | 32.50 abcd | ||
| Force 200 ST | ST | 260 ml/100 kg seed | 32.25 abcd | |
| Capture 1.15 G | TB | 8 oz/1000 ft of row | 32.00 abcd | |
| Cruiser (Adage) 5 FS | ST | 100 g ai/100 kg seed | 32.00 abcd | |
| Kernel Guard Supreme 24.42 DS | ST | 54.8 g ai/100 kg seed | 32.00 abcd | |
| ProShield | ST | 32.00 abcd | ||
| Capture 1.15 G | IF | 4 oz/1000 ft of row | 31.75 abcd | |
| Regent 4 SC | IF MT | .12 oz/1000 ft of row | 30.00 bcd | |
| F0570 | IF MT | 1.44 oz/acre | 30.00 bcd | |
| Capture 1.15 G | TB | 4 oz/1000 ft of row | 29.25 cd | |
| Counter 20 CR | IF | 3 oz/1000 ft of row | 28.75 d | |
| Aztec 2.1 G BD | IF | 5.025 oz/1000 ft of row | 28.25 d | |
| Untreated | 28.25 d | |||
| Regent 4 SC | IF MT | .24 oz/1000 ft of row | 27.75 d | |
| ST = seed treatment IF = in-furrow MT = microtube TB = t-band | ||||
| Means with the same letter are not significantly different. (LSD = 5.1743; alpha = 0.05) | ||||
| Table 4. Corn rootworm insecticide screening Concord, 2001 Root Ratings (K. Jarvi) | ||||
| Treatment method | Application rate oz/1000 row ft | Rate | Rate lb ai/1000 row ft | Root rating |
| Aztec 4.67 G | SB TB | 3 oz | 0.15 | 0.245 a |
| Force 3 G | TB | 4 oz | 0.12 | 0.250 a |
| Counter 20 CR | TB | 6 oz | 1.20 | 0.278 ab |
| Aztec 2.1 G BD | TB | 6.7 oz | 0.14 | 0.290 ab |
| Counter 20 CR | IF | 6 oz | 1.20 | 0.293 ab |
| Aztec 2.1 G BD | IF | 5.025 oz | 0.105 | 0.298 ab |
| Fortress 5 G | SB TB | 3 oz | 0.16 | 0.323 ab |
| Lorsban 15 G | TB | 8 oz | 1.20 | 0.366 ab |
| Aztec 2.1 G BD | IF | 6.7 oz | 0.14 | 0.375 ab |
| Fortress 5 G SB | IF | 3 oz | 0.16 | 0.388 ab |
| Regent 4 SC | MT 5 gal | 0.24 oz | 0.13 | 0.390 ab |
| Force 3 G | IF | 4 oz | 0.12 | 0.418 ab |
| Force 3 G | IF | 3 oz | 0.09 | 0.428 ab |
| Aztec 2.1 G BD | IF | 3.35 oz | 0.07 | 0.443 ab |
| Counter 20 CR | IF | 3 oz | 0.60 | 0.468 ab |
| Force 3 G | IF | 2 oz | 0.06 | 0.480 ab |
| Counter 20 CR | IF | 4.5 oz | 0.90 | 0.485 ab |
| Aztec 4.67 G | SB IF | 3 oz | 0.15 | 0.493 ab |
| Lorsban 15 G | IF | 8 oz | 1.20 | 0.513 ab |
| Regent 4 SC | MT 1 gal | 0.24 oz | 0.13 | 0.585 abc |
| Lorsban 15 G | IF | 4 oz. | 0.60 | 0.620 abcd |
| Capture 2 EC | 5 in TB 5 gal | 0.30 oz | 0.0046 | 0.658 abcd |
| Capture 1.15 G | IF | 8 oz | 0.0054 | 0.764 abcd |
| Lorsban 15 G | IF | 6 oz | 0.90 | 0.803 bcde |
| Clothianidin 600 FS | ST | 1.25 mg/kernel | 1.090 cde | |
| Prescribe 600 FS | ST | 1.35 mg/kernel | 1.115 cde | |
| Capture 1.15 G | TB | 8 oz | 0.0054 | 1.118 cde |
| ProShield | ST | 1.135 de | ||
| Capture 1.15 G | IF | 6 oz | 0.0040 | 1.340 ef |
| Furadan 4 F | TB | Post 1 qt formulation/ acre broadcast rate | 1.733 fg | |
| Untreated | 1.828 fg | |||
| Untreated | 2.205 g | |||
| ST = seed treatment IF = in-furrow MT = microtube SB = Smartbox TB = t-band | ||||
| Means with the same letter are not significantly different. (LSD = 0.5438; alpha = 0.05) | ||||