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CORN ROOTWORM CONTROL, 2006

CORN ROOTWORM CONTROL, 2006 (F16) CORN: Zea mays (L.) ‘Novartis 67-D6’ Keith J. Jarvi Northeast Research and Extension Center 601 E. Benjamin Ave. Suite 104 Norfolk, NE 68701-0812 Phone: (402) 370-4016 Fax: (402) 370-4010 E-mail: kjarvi1@unl.edu Thomas E. Hunt Haskell Agricultural Laboratory 57905 866 Rd Concord, NE 68728-2828 Phone (402) 584-2863 Fax: (402) 584-2859 E-mail: thunt2@unl.edu Gerald W. Echtenkamp Haskell Agricultural Laboratory 57905 866 Rd Concord, NE 68728-2828 Phone (402) 584-3852 Fax: (402) 584-3859 E-mail: gechtenkamp1@unl.edu Western corn rootworm: Diabrotica virgifera virgifera LeConte Northern corn rootworm: Diabrotica barberi Smith and Lawrence The objective of this experiment was to test insecticide and seed treatment (ST) combinations for corn rootworm control. The experiment was located at the Haskell Agricultural Laboratory one mile east of Concord in Dixon County, northeast Nebraska. The plot was planted 4 and 5 May into a trap crop area that was late-planted corn in 2005, and dug and rated on 17 and 18 Jul. The experimental design was a randomized complete block with four replications, each treatment 2 rows 45 ft long. Granular insecticides were applied with a cone-belt distributor mounted on a John Deere Maxemerge planter equipped with incorporation tines in a seven-inch band (TB) behind the press wheel or in-furrow (IF) in front of the press wheel. Fortress 5 G, Aztec 4.67 G, and Dow EF1315 were applied by a Smartbox (SB) granular applicator. Capture 2E, Capture LFR, BASF 320, Syngenta A14974 and Regent 4SC were applied by microtubes (MT) T-banded or in the seed furrow in front of the press wheel at 5 gpa finished spray. Spray carrier was either water or 10-34-0 starter fertilizer. The seeding rate was 22,100 seeds/acre on 30 inch rows. Soil type was silt loam (OM < 3%, pH 5.3). The field was disked 8 Nov 2005 and 20 Apr 2006. Approximately 20% corn stalk residue was remaining after field preparation. Growing conditions were very dry until late July. Five randomly selected roots from each replication were rated on the Iowa State 0- 3 scale (0, no damage; 3, 3 or more nodes pruned to within 1 1/2 inch of the stalk). Data were analyzed using analysis of variance (ANOVA) and treatment means were separated using LSD (P = 0.05). Rootworm pressure was moderate with the untreated check rating near 1.5 (nearly one and 1/2 full nodes pruned). All treatments except BASF 320 with fertilizer carrier were significantly better than the untreated check. Treatment/ IF, TB, Carrier/ formulation application rate or ST Application method Root rating Aztec 2.1 G 6.7 oz/1000 ft of row IF 0.23a Aztec 2.1 G 6.7 oz/1000 ft of row TB 0.61bcdefg Aztec 2.1 G + 6.7 oz/1000 ft of row IF 0.29ab Poncho 250 .25 g ai/1000 seeds ST Aztec 2.1 G+ 6.7 oz/1000 ft of row IF 0.27a Poncho 1250 1.25 g ai/1000 seeds ST Poncho 1250 1.25 g ai/1000 seeds ST 0.93ghij Regent 4 SC+ .24 oz/1000 ft of row IF 5 gal/a 10-34-0 0.22a Regent TS 2.08 oz/100 wt seed ST BASF 320 .9182 oz/1000 ft of row IF 5 gal/a H20 1.09ij BASF 320 .9182 oz/1000 ft of row IF 5 gal/a 10-34-0 1.50k Regent 4 SC+ .158 oz/1000 ft of row IF 5 gal/a 10-34-0 0.48abcdef Regent TS 2.08 oz/100 wt seed ST Regent 4SC+ .158 oz/1000 ft of row IF 5 gal/a 10-34-0 0.39abcde Poncho 250 .25 g ai/1000 seeds ST Lorsban 15 G 8 oz/1000 ft of row TB 0.49abcdef Lorsban 15 G+ 6 oz/1000 ft of row TB 0.38 abcde Poncho 250 .25 g ai/1000 seeds ST Capture LFR .49 oz/1000 ft of row IF 5 gal/a 10-34-0 0.53abcdef Capture LFR+ .39 oz/1000 ft of row IF 5 gal/a 10-34-0 0.49abcdef Poncho 250 .25 g ai/1000 seeds ST Capture 2 E .30 oz/1000 ft of row TB 5 gal/a H20 0.89ghij Capture 2 E .30 oz/1000 ft of row IF 5 gal/a H20 0.66defg Force 3 G 4 oz/1000 ft of row TB 0.33abc Force 3 G 4 oz/1000 ft of row IF 0.35abcde A14974 .346 oz/1000 ft of row TB 5 gal/a H20 0.31ab A14974 .46 oz/1000 ft of row TB 5 gal/a H20 0.38abcde A14974 .58 oz/1000 ft of row TB 5 gal/a H20 0.32ab A14974 .346 oz/1000 ft of row IF 5 gal/a H20 0.49abcdef A14974 .46 oz/1000 ft of row IF 5 gal/a H20 0.67efg A14974 .58 oz/1000 ft of row IF 5 gal/a H20 0.34abcd Cruiser A9765 ST 0.65 cdefg Aztec 4.67 G 3 oz/1000 ft of row IF Smartbox 0.21a Fortress 5 G 3.7 oz/1000 ft of row IF Smartbox 0.48abcdef EF 1315 IF Smartbox 0.73fgh Fortress 2.5 G 7.4 oz/1000 ft of row IF 0.37abcde Valent 1 ST 1.11j Valent 2 ST 1.09ij Valent 3 ST 0.80fghij Valent 4 ST 0.77fghi Valent 5 ST 1.04hij Cruiser Extreme ST 0.50abcdef Regent 4 SC+ .188 oz/1000 ft of row IF 5 gal/a 10-34-0 0.29ab Poncho 250 .25 g ai/1000 seeds ST Regent 4 SC .24 oz/1000 ft of row IF 5 gal/a H20 0.22a Untreated check 1.45k Means followed by the same letter are not significantly different (LSD, P > 0.05) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CORN ROOTWORM CONTROL, 2006

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10.1093/amt/32.1.F16
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Abstract

(F16) CORN: Zea mays (L.) ‘Novartis 67-D6’ Keith J. Jarvi Northeast Research and Extension Center 601 E. Benjamin Ave. Suite 104 Norfolk, NE 68701-0812 Phone: (402) 370-4016 Fax: (402) 370-4010 E-mail: kjarvi1@unl.edu Thomas E. Hunt Haskell Agricultural Laboratory 57905 866 Rd Concord, NE 68728-2828 Phone (402) 584-2863 Fax: (402) 584-2859 E-mail: thunt2@unl.edu Gerald W. Echtenkamp Haskell Agricultural Laboratory 57905 866 Rd Concord, NE 68728-2828 Phone (402) 584-3852 Fax: (402) 584-3859 E-mail: gechtenkamp1@unl.edu Western corn rootworm: Diabrotica virgifera virgifera LeConte Northern corn rootworm: Diabrotica barberi Smith and Lawrence The objective of this experiment was to test insecticide and seed treatment (ST) combinations for corn rootworm control. The experiment was located at the Haskell Agricultural Laboratory one mile east of Concord in Dixon County, northeast Nebraska. The plot was planted 4 and 5 May into a trap crop area that was late-planted corn in 2005, and dug and rated on 17 and 18 Jul. The experimental design was a randomized complete block with four replications, each treatment 2 rows 45 ft long. Granular insecticides were applied with a cone-belt distributor mounted on a John Deere Maxemerge planter equipped with incorporation tines in a seven-inch band (TB) behind the press wheel or in-furrow (IF) in front of the press wheel. Fortress 5 G, Aztec 4.67 G, and Dow EF1315 were applied by a Smartbox (SB) granular applicator. Capture 2E, Capture LFR, BASF 320, Syngenta A14974 and Regent 4SC were applied by microtubes (MT) T-banded or in the seed furrow in front of the press wheel at 5 gpa finished spray. Spray carrier was either water or 10-34-0 starter fertilizer. The seeding rate was 22,100 seeds/acre on 30 inch rows. Soil type was silt loam (OM < 3%, pH 5.3). The field was disked 8 Nov 2005 and 20 Apr 2006. Approximately 20% corn stalk residue was remaining after field preparation. Growing conditions were very dry until late July. Five randomly selected roots from each replication were rated on the Iowa State 0- 3 scale (0, no damage; 3, 3 or more nodes pruned to within 1 1/2 inch of the stalk). Data were analyzed using analysis of variance (ANOVA) and treatment means were separated using LSD (P = 0.05). Rootworm pressure was moderate with the untreated check rating near 1.5 (nearly one and 1/2 full nodes pruned). All treatments except BASF 320 with fertilizer carrier were significantly better than the untreated check. Treatment/ IF, TB, Carrier/ formulation application rate or ST Application method Root rating Aztec 2.1 G 6.7 oz/1000 ft of row IF 0.23a Aztec 2.1 G 6.7 oz/1000 ft of row TB 0.61bcdefg Aztec 2.1 G + 6.7 oz/1000 ft of row IF 0.29ab Poncho 250 .25 g ai/1000 seeds ST Aztec 2.1 G+ 6.7 oz/1000 ft of row IF 0.27a Poncho 1250 1.25 g ai/1000 seeds ST Poncho 1250 1.25 g ai/1000 seeds ST 0.93ghij Regent 4 SC+ .24 oz/1000 ft of row IF 5 gal/a 10-34-0 0.22a Regent TS 2.08 oz/100 wt seed ST BASF 320 .9182 oz/1000 ft of row IF 5 gal/a H20 1.09ij BASF 320 .9182 oz/1000 ft of row IF 5 gal/a 10-34-0 1.50k Regent 4 SC+ .158 oz/1000 ft of row IF 5 gal/a 10-34-0 0.48abcdef Regent TS 2.08 oz/100 wt seed ST Regent 4SC+ .158 oz/1000 ft of row IF 5 gal/a 10-34-0 0.39abcde Poncho 250 .25 g ai/1000 seeds ST Lorsban 15 G 8 oz/1000 ft of row TB 0.49abcdef Lorsban 15 G+ 6 oz/1000 ft of row TB 0.38 abcde Poncho 250 .25 g ai/1000 seeds ST Capture LFR .49 oz/1000 ft of row IF 5 gal/a 10-34-0 0.53abcdef Capture LFR+ .39 oz/1000 ft of row IF 5 gal/a 10-34-0 0.49abcdef Poncho 250 .25 g ai/1000 seeds ST Capture 2 E .30 oz/1000 ft of row TB 5 gal/a H20 0.89ghij Capture 2 E .30 oz/1000 ft of row IF 5 gal/a H20 0.66defg Force 3 G 4 oz/1000 ft of row TB 0.33abc Force 3 G 4 oz/1000 ft of row IF 0.35abcde A14974 .346 oz/1000 ft of row TB 5 gal/a H20 0.31ab A14974 .46 oz/1000 ft of row TB 5 gal/a H20 0.38abcde A14974 .58 oz/1000 ft of row TB 5 gal/a H20 0.32ab A14974 .346 oz/1000 ft of row IF 5 gal/a H20 0.49abcdef A14974 .46 oz/1000 ft of row IF 5 gal/a H20 0.67efg A14974 .58 oz/1000 ft of row IF 5 gal/a H20 0.34abcd Cruiser A9765 ST 0.65 cdefg Aztec 4.67 G 3 oz/1000 ft of row IF Smartbox 0.21a Fortress 5 G 3.7 oz/1000 ft of row IF Smartbox 0.48abcdef EF 1315 IF Smartbox 0.73fgh Fortress 2.5 G 7.4 oz/1000 ft of row IF 0.37abcde Valent 1 ST 1.11j Valent 2 ST 1.09ij Valent 3 ST 0.80fghij Valent 4 ST 0.77fghi Valent 5 ST 1.04hij Cruiser Extreme ST 0.50abcdef Regent 4 SC+ .188 oz/1000 ft of row IF 5 gal/a 10-34-0 0.29ab Poncho 250 .25 g ai/1000 seeds ST Regent 4 SC .24 oz/1000 ft of row IF 5 gal/a H20 0.22a Untreated check 1.45k Means followed by the same letter are not significantly different (LSD, P > 0.05)

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2007

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