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APHID CONTROL ON FLUE-CURED TOBACCO WITH FOLIAR SPRAYS, 2006

APHID CONTROL ON FLUE-CURED TOBACCO WITH FOLIAR SPRAYS, 2006 (F63) TOBACCO: Nicotiana tabacum L. Flue-cured ‘NC 297’ Paul J. Semtner, Lakshmipathi Srigiriraju, and Ned Jones Virginia Tech Southern Piedmont Agricultural Research and Extension Center 2375 Darvills Road Blackstone, VA 23824 Telephone: (434) 292-5331 Fax (434) 292 5623 e-mail: psemtner@vt.edu e-mail: pathi@vt.edu e-mail: edjones@vt.edu Green peach aphid (GPA): Myzus periscae (Sulzer) This experiment was conducted at the Virginia Tech Southern Piedmont AREC, Blackstone, VA to evaluate various insecticides applied as foliar sprays for GPA control on flue-cured tobacco. Four treatments and an untreated check were established in a RCBD with 4 replications. On 5 May, flue-cured tobacco ‘NC 297’ was transplanted into experimental plots, 4 × 40 ft (1 row × 22 plants). Plots were separated by single untreated guard rows and 5-ft fallow alleys separated the blocks. On 13 Jul, foliar treatments were applied with a CO -pressurized backpack sprayer calibrated to deliver 25 gpa at 50 psi with 3 Spraying Systems TX-12 nozzles per row. Production practices followed the recommendations by the Virginia Extension Service for weed and disease control and fertilization. GPA populations were estimated for 4 upper leaves of 10 plants per plot on 15, 19 and 27 Jul, 2, 6, and 14 DAT. Data were analyzed by ANOVA and significantly different means were separated by SNK (P = 0.05). GPA count data were transformed to Log (x + 1) before analysis. Actual means are presented in the tables. All treatments gave excellent control of the GPA through 27 Jul, 14 DAT. Actara was the most effective with significantly fewer GPA than the Assail, Fulfill, and Orthene treatments on each observation date. Rainfall was 1.2 inch on 20 Jul, 7 DAT and 1.3 inch from 22 to 24 Jul and probably had little effect on the treatments. Treatment/ Rate 15 Jul 19 Jul 27 Jul formulation (amt/acre) 2 DAT 6 DAT 14 DAT Actara 25WG 3.0 oz 32d 65c 96c Assail 30WG 3.0 oz 67cd 249b 552b Fulfill 50WG 2.75 oz 166bc 215b 477b Orthene 97PE 12.0 oz 311b 324b 594b Untreated check 12,410a 43,951a 20,440a Means within a column not followed by the same letter(s) are significantly different (SNK, Po = 0.05). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

APHID CONTROL ON FLUE-CURED TOBACCO WITH FOLIAR SPRAYS, 2006

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Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/32.1.F63
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Abstract

(F63) TOBACCO: Nicotiana tabacum L. Flue-cured ‘NC 297’ Paul J. Semtner, Lakshmipathi Srigiriraju, and Ned Jones Virginia Tech Southern Piedmont Agricultural Research and Extension Center 2375 Darvills Road Blackstone, VA 23824 Telephone: (434) 292-5331 Fax (434) 292 5623 e-mail: psemtner@vt.edu e-mail: pathi@vt.edu e-mail: edjones@vt.edu Green peach aphid (GPA): Myzus periscae (Sulzer) This experiment was conducted at the Virginia Tech Southern Piedmont AREC, Blackstone, VA to evaluate various insecticides applied as foliar sprays for GPA control on flue-cured tobacco. Four treatments and an untreated check were established in a RCBD with 4 replications. On 5 May, flue-cured tobacco ‘NC 297’ was transplanted into experimental plots, 4 × 40 ft (1 row × 22 plants). Plots were separated by single untreated guard rows and 5-ft fallow alleys separated the blocks. On 13 Jul, foliar treatments were applied with a CO -pressurized backpack sprayer calibrated to deliver 25 gpa at 50 psi with 3 Spraying Systems TX-12 nozzles per row. Production practices followed the recommendations by the Virginia Extension Service for weed and disease control and fertilization. GPA populations were estimated for 4 upper leaves of 10 plants per plot on 15, 19 and 27 Jul, 2, 6, and 14 DAT. Data were analyzed by ANOVA and significantly different means were separated by SNK (P = 0.05). GPA count data were transformed to Log (x + 1) before analysis. Actual means are presented in the tables. All treatments gave excellent control of the GPA through 27 Jul, 14 DAT. Actara was the most effective with significantly fewer GPA than the Assail, Fulfill, and Orthene treatments on each observation date. Rainfall was 1.2 inch on 20 Jul, 7 DAT and 1.3 inch from 22 to 24 Jul and probably had little effect on the treatments. Treatment/ Rate 15 Jul 19 Jul 27 Jul formulation (amt/acre) 2 DAT 6 DAT 14 DAT Actara 25WG 3.0 oz 32d 65c 96c Assail 30WG 3.0 oz 67cd 249b 552b Fulfill 50WG 2.75 oz 166bc 215b 477b Orthene 97PE 12.0 oz 311b 324b 594b Untreated check 12,410a 43,951a 20,440a Means within a column not followed by the same letter(s) are significantly different (SNK, Po = 0.05).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2007

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