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EFFICACY OF SELECTED INSECTICIDES AGAINST TARNISHED PLANT BUG ON COTTON, 2009

EFFICACY OF SELECTED INSECTICIDES AGAINST TARNISHED PLANT BUG ON COTTON, 2009 Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F36 (F36) COTTON: Gossypium hirsutum (L.) ‘Phytogen 315RF’ D. R. Cook Mississippi State University Delta Research and Extension Center Stoneville, MS 38776 Phone: (662) 686-9311 Fax: (662) 686-7336 E-mail: dcook@ext.msstate.edu J. Gore Tarnished plant bug (TPB): Lygus lineolaris (Palisot de Beauvois) Selected insecticides were evaluated for control of TPB at the Delta Research and Extension Center (Washington County). Cotton seed were planted on a Bosket very fine sandy loam soil on 3 Jun (Phytogen 315RF). Plot size was four rows (40 in centers) by 50 feet. Treatments were replicated four times in a RCB design. Treatments were applied on 7, 14, and 24 Aug with a high clearance sprayer and compressed air charged spray system calibrated to deliver 10 gpa through Teejet TX-10 hollow cone nozzles (2/row). Treatment efficacy was determined by sampling the two center rows of each plot with a 2.5 ft black drop cloth (sample of 2 drops per plot (2rows) for a total of 10 row feet) at 3, 6, days after treatment 1 (DAT1), 3 and 6 DAT2, and 2 and 7 DAT3. Plots were harvested on 4 Nov with a mechanical harvester. Seedcotton weights were converted to lint yield per acre using a lint percentage of 38%. Data were subjected to ANOVA and means separated according to Fisher’s Protected Least Significant Difference. There were no significant differences among treatments for numbers of TPB nymphs at 3 and 6 DAT1 and 3 DAT2. At 6DAT2, all of the insecticide treated plots had significantly fewer TPB nymphs compared to the non-treated plots. Plots treated with Acephate, Bidrin, Carbine, Leverage, Endigo, or Brigade had significantly fewer nymphs compared to plots treated with Trimax Pro or Intruder. At 2DAT3, all of the insecticide treated plots had significantly fewer TPB nymphs compared to the non-treated plots. Plots treated with Bidrin had significantly lower densities of nymphs compared to plots treated with Vydate, Centric, Carbine, or Intruder. At 7DAT3, all of the insecticide treated plots had significantly fewer TPB nymphs compared to the non-treated plots. Plots treated with Acephate or Endigo had significantly lower densities of nymphs compared to plots treated with Vydate, Trimax Pro, or Intruder. There were no significant differences among treatments for lint yield. No. plant bug nymphs / 10 row feet Rate/acre Lint Yield Treatment/form. (oz form.) 3 DAT1 6 DAT1 3 DAT2 6 DAT2 2 DAT3 7 DAT3 lb/acre Acephate 90S 12.0 6.8a 4.0a 2.5a 1.3de 1.0cd 0.5e 565a Bidrin 8E 6.0 7.0a 5.7a 2.3a 3.0cde 0.0d 4.7bcd 473a Vydate 3.77L 12.0 6.5a 3.6a 2.3a 1.5de 4.5bc 12.6a 462a Centric 40WG 2.0 7.5a 2.5a 0.9a 3.0cde 4.8bc 3.7b-e 480a Trimax Pro 4.44SC 1.5 7.5a 7.5a 1.9a 5.3bc 3.8bcd 6.4abc 431a Carbine 50WG 2.5 9.8a 2.8a 1.4a 2.0de 4.3bc 3.2cde 459a Leverage 2.7SC 4.5 12.5a 3.7a 1.0a 2.0de 2.5bcd 3.7b-e 438a Intruder 70WP 1.1 10.8a 3.0a 4.9a 7.0b 6.3b 9.6ab 391a Endigo 2.06SC 5.0 6.8a 3.1a 0.7a 0.5e 2.3cd 1.2de 473a Diamond 0.83EC 9.0 11.5a 4.8a 0.4a 3.8cd 2.8cd 4.5bcd 445a Brigade 2EC 5.12 6.5a 2.7a 0.9a 0.8e 3.0bcd 4.4bcd 484a Non-Treated - 6.5a 5.2a 6.3a 13.0a 11.3a 9.7a 450a P>F 0.51 0.68 0.06 <0.01 <0.01 0.02 0.67 Means within columns followed by a common letter are not significantly different (P = 0.05, FPLSD). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EFFICACY OF SELECTED INSECTICIDES AGAINST TARNISHED PLANT BUG ON COTTON, 2009

Arthropod Management Tests , Volume 37 (1) – Jan 1, 2012

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Abstract

Arthropod Management Tests 2012, Vol. 37 doi: 10.4182/amt.2012.F36 (F36) COTTON: Gossypium hirsutum (L.) ‘Phytogen 315RF’ D. R. Cook Mississippi State University Delta Research and Extension Center Stoneville, MS 38776 Phone: (662) 686-9311 Fax: (662) 686-7336 E-mail: dcook@ext.msstate.edu J. Gore Tarnished plant bug (TPB): Lygus lineolaris (Palisot de Beauvois) Selected insecticides were evaluated for control of TPB at the Delta Research and Extension Center (Washington County). Cotton seed were planted on a Bosket very fine sandy loam soil on 3 Jun (Phytogen 315RF). Plot size was four rows (40 in centers) by 50 feet. Treatments were replicated four times in a RCB design. Treatments were applied on 7, 14, and 24 Aug with a high clearance sprayer and compressed air charged spray system calibrated to deliver 10 gpa through Teejet TX-10 hollow cone nozzles (2/row). Treatment efficacy was determined by sampling the two center rows of each plot with a 2.5 ft black drop cloth (sample of 2 drops per plot (2rows) for a total of 10 row feet) at 3, 6, days after treatment 1 (DAT1), 3 and 6 DAT2, and 2 and 7 DAT3. Plots were harvested on 4 Nov with a mechanical harvester. Seedcotton weights were converted to lint yield per acre using a lint percentage of 38%. Data were subjected to ANOVA and means separated according to Fisher’s Protected Least Significant Difference. There were no significant differences among treatments for numbers of TPB nymphs at 3 and 6 DAT1 and 3 DAT2. At 6DAT2, all of the insecticide treated plots had significantly fewer TPB nymphs compared to the non-treated plots. Plots treated with Acephate, Bidrin, Carbine, Leverage, Endigo, or Brigade had significantly fewer nymphs compared to plots treated with Trimax Pro or Intruder. At 2DAT3, all of the insecticide treated plots had significantly fewer TPB nymphs compared to the non-treated plots. Plots treated with Bidrin had significantly lower densities of nymphs compared to plots treated with Vydate, Centric, Carbine, or Intruder. At 7DAT3, all of the insecticide treated plots had significantly fewer TPB nymphs compared to the non-treated plots. Plots treated with Acephate or Endigo had significantly lower densities of nymphs compared to plots treated with Vydate, Trimax Pro, or Intruder. There were no significant differences among treatments for lint yield. No. plant bug nymphs / 10 row feet Rate/acre Lint Yield Treatment/form. (oz form.) 3 DAT1 6 DAT1 3 DAT2 6 DAT2 2 DAT3 7 DAT3 lb/acre Acephate 90S 12.0 6.8a 4.0a 2.5a 1.3de 1.0cd 0.5e 565a Bidrin 8E 6.0 7.0a 5.7a 2.3a 3.0cde 0.0d 4.7bcd 473a Vydate 3.77L 12.0 6.5a 3.6a 2.3a 1.5de 4.5bc 12.6a 462a Centric 40WG 2.0 7.5a 2.5a 0.9a 3.0cde 4.8bc 3.7b-e 480a Trimax Pro 4.44SC 1.5 7.5a 7.5a 1.9a 5.3bc 3.8bcd 6.4abc 431a Carbine 50WG 2.5 9.8a 2.8a 1.4a 2.0de 4.3bc 3.2cde 459a Leverage 2.7SC 4.5 12.5a 3.7a 1.0a 2.0de 2.5bcd 3.7b-e 438a Intruder 70WP 1.1 10.8a 3.0a 4.9a 7.0b 6.3b 9.6ab 391a Endigo 2.06SC 5.0 6.8a 3.1a 0.7a 0.5e 2.3cd 1.2de 473a Diamond 0.83EC 9.0 11.5a 4.8a 0.4a 3.8cd 2.8cd 4.5bcd 445a Brigade 2EC 5.12 6.5a 2.7a 0.9a 0.8e 3.0bcd 4.4bcd 484a Non-Treated - 6.5a 5.2a 6.3a 13.0a 11.3a 9.7a 450a P>F 0.51 0.68 0.06 <0.01 <0.01 0.02 0.67 Means within columns followed by a common letter are not significantly different (P = 0.05, FPLSD).

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2012

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