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EVALUATION OF SELECTED INSECTICIDES AGAINST SUGARCANE BEETLE AND CUTWORMS IN FIELD CORN, 2004

EVALUATION OF SELECTED INSECTICIDES AGAINST SUGARCANE BEETLE AND CUTWORMS IN FIELD CORN, 2004 (F21) CORN (FIELD): Zea mays (L.), ‘DeKalb DK-697’ EVALUATION OF SELECTED INSECTICIDES AGAINST SUGARCANE BEETLE AND CUTWORMS IN FIELD CORN, 2004 R. H. Gable LSU AgCenter Macon Ridge Research Station Winnsboro, LA 71295 LSU AgCenter Phone: (318) 435-2157 Fax: (318) 435-2133 E-mail: rgable@agcenter.lsu.edu K. D. Emfinger B. R. Leonard J. Temple LSU AgCenter Department of Entomology Baton Rouge, LA 70803 Sugarcane beetle: Euetheola humilis rugiceps (LeConte) Black cutworm: Agrotis ipsilon (Hufnagel) Variegated cutworm: Peridroma saucia (Hübner) Field corn seed were planted into a Gigger silt loam soil on 25 Mar at the Macon Ridge Research Station. Plot size was 4 rows (centered on 40 inches) × 35 ft. Conservation tillage practices an a winter cover crop of Austrian winter peas, Pisum sativum arvense (L.), were used to increase the probability of establishing damaging insect infestations. Surface vegetation was destroyed with a herbicide treatment of Gramoxone Extra 2.5EC (0.625 lb [AI]/acre) two wk prior to planting. Treatments were replicated four times within a RCB design. Insecticides were applied on the seed (SEEDT), as in-furrow granules (IFGAP) and as T- banded granules (TBAND) with a John Deere 7300 row crop planter. All plots except those treated with Aztec and Poncho (0.45 mg [AI]/seed) were oversprayed with Warrior T 1SC (0.02 lb [AI]/acre) immediately post-plant. Sugarcane beetle and cutworm damaged corn seedlings were recorded on the two center rows of each plot weekly for two weeks after plant emergence. Plant populations were measured at 62 DAPE. Data were subjected to ANOVA and means were separated according to Tukey’s test (P ≤ 0.05). The test received 10.9 inches of rainfall during the testing period. All insecticide treatments, except Cruiser, Lorsban, and Aztec, significantly reduced sugarcane beetle damage to plants compared to the non-treated control. All insecticide treated plots had fewer cutworm damaged seedlings compared to the non-treated control. All insecticide treatments, except Counter and Lorsban, significantly improved plant populations. No phytotoxicity was observed with any of the insecticide treatments. Cumulative (2 wk summary) no. of damaged corn seedlings Treatment/ Rate Application Plant population a c formulation lb (AI)/acre method Sugarcane beetle Cutworm (no./acre) Cruiser 5FS 0.25 SEEDT 5.5ab 1.0b 25004.4a Poncho 5FS 0.25 SEEDT 3.8b 0.8b 24398.1a Poncho 5FS 0.45 SEEDT 2.8b 5.3b 24304.7a Gaucho 600FS 0.6 SEEDT 2.0b 1.5b 23325.0a Counter 15G 1.0 IFGAP 3.3b 1.0b 19173.2b Lorsban 15G 1.0 TBAND 6.5ab 0.5b 21832.2ab Aztec 2.1G 0.112 TBAND 6.0ab 0.8b 22951.8a Untreated check --- --- 11.0a 11.5a 19173.1b P > F <0.01 <0.01 <0.01 Means within columns followed by a common letter are not significantly different (Tukey’s Test, P > 0.05). SEEDT= seed treatment, IFGAP= In-furrow granule at-planting, TBAND= T-banded granule applied at-planting. All plots except Aztec and Poncho (0.45 mg [AI]/seed) were treated with Warrior T 1SC (0.02 lb [AI]/acre) immediately post-plant. Plant stand taken 62 DAPE. mg (AI)/seed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF SELECTED INSECTICIDES AGAINST SUGARCANE BEETLE AND CUTWORMS IN FIELD CORN, 2004

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
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10.1093/amt/30.1.F21
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Abstract

(F21) CORN (FIELD): Zea mays (L.), ‘DeKalb DK-697’ EVALUATION OF SELECTED INSECTICIDES AGAINST SUGARCANE BEETLE AND CUTWORMS IN FIELD CORN, 2004 R. H. Gable LSU AgCenter Macon Ridge Research Station Winnsboro, LA 71295 LSU AgCenter Phone: (318) 435-2157 Fax: (318) 435-2133 E-mail: rgable@agcenter.lsu.edu K. D. Emfinger B. R. Leonard J. Temple LSU AgCenter Department of Entomology Baton Rouge, LA 70803 Sugarcane beetle: Euetheola humilis rugiceps (LeConte) Black cutworm: Agrotis ipsilon (Hufnagel) Variegated cutworm: Peridroma saucia (Hübner) Field corn seed were planted into a Gigger silt loam soil on 25 Mar at the Macon Ridge Research Station. Plot size was 4 rows (centered on 40 inches) × 35 ft. Conservation tillage practices an a winter cover crop of Austrian winter peas, Pisum sativum arvense (L.), were used to increase the probability of establishing damaging insect infestations. Surface vegetation was destroyed with a herbicide treatment of Gramoxone Extra 2.5EC (0.625 lb [AI]/acre) two wk prior to planting. Treatments were replicated four times within a RCB design. Insecticides were applied on the seed (SEEDT), as in-furrow granules (IFGAP) and as T- banded granules (TBAND) with a John Deere 7300 row crop planter. All plots except those treated with Aztec and Poncho (0.45 mg [AI]/seed) were oversprayed with Warrior T 1SC (0.02 lb [AI]/acre) immediately post-plant. Sugarcane beetle and cutworm damaged corn seedlings were recorded on the two center rows of each plot weekly for two weeks after plant emergence. Plant populations were measured at 62 DAPE. Data were subjected to ANOVA and means were separated according to Tukey’s test (P ≤ 0.05). The test received 10.9 inches of rainfall during the testing period. All insecticide treatments, except Cruiser, Lorsban, and Aztec, significantly reduced sugarcane beetle damage to plants compared to the non-treated control. All insecticide treated plots had fewer cutworm damaged seedlings compared to the non-treated control. All insecticide treatments, except Counter and Lorsban, significantly improved plant populations. No phytotoxicity was observed with any of the insecticide treatments. Cumulative (2 wk summary) no. of damaged corn seedlings Treatment/ Rate Application Plant population a c formulation lb (AI)/acre method Sugarcane beetle Cutworm (no./acre) Cruiser 5FS 0.25 SEEDT 5.5ab 1.0b 25004.4a Poncho 5FS 0.25 SEEDT 3.8b 0.8b 24398.1a Poncho 5FS 0.45 SEEDT 2.8b 5.3b 24304.7a Gaucho 600FS 0.6 SEEDT 2.0b 1.5b 23325.0a Counter 15G 1.0 IFGAP 3.3b 1.0b 19173.2b Lorsban 15G 1.0 TBAND 6.5ab 0.5b 21832.2ab Aztec 2.1G 0.112 TBAND 6.0ab 0.8b 22951.8a Untreated check --- --- 11.0a 11.5a 19173.1b P > F <0.01 <0.01 <0.01 Means within columns followed by a common letter are not significantly different (Tukey’s Test, P > 0.05). SEEDT= seed treatment, IFGAP= In-furrow granule at-planting, TBAND= T-banded granule applied at-planting. All plots except Aztec and Poncho (0.45 mg [AI]/seed) were treated with Warrior T 1SC (0.02 lb [AI]/acre) immediately post-plant. Plant stand taken 62 DAPE. mg (AI)/seed.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2005

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