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TOBACCO BUDWORM CONTROL WITH UNREGISTERED FOLIAR MATERIALS, 2012

TOBACCO BUDWORM CONTROL WITH UNREGISTERED FOLIAR MATERIALS, 2012 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F78 (F78) TOBACCO: Nicotiana tobacum, ‘NC196’ Aurora Toennisson Department of Entomology North Carolina State University Campus Box 7634 Raleigh, NC 27695 Phone: 919-513-4344 E-mail: tatoenni@ncsu.edu Clyde Sorenson E-mail: clyde_sorenson@ncsu.edu Hannah Burrack E-mail: hannah_burrack@ncsu.edu Tobacco budworm (TBW): Heliothis virescens (Fabricius) An experiment to assess the efficacy of an unregistered foliar material, HGW86 10SE, at different rates and in combination with soil-applied systemic pesticides against TBW was conducted at the Lower Coastal Plain Research Station near Kinston, NC. Five insecticide treatments plus an untreated check (UTC) were replicated four times and arranged in a RCB design. Each plot consisted of 4, ca. 25 plant, rows and was 0.018 acres. Pre-transplant tray drench (PTTD) treatments were applied in the greenhouse on 16 April in 1 L water using a CO pressurized sprayer fitted with a single flat-fan nozzle. Twice the application volume was used to wash the material into the root zone immediately following treatment. Plants were transplanted and in-furrow transplant water (TWP) treatments were applied in ca. 200 gal per acre of water on 18 April. TBW densities in UTC plots reached 10%, the current economic threshold, on 4 June and foliar treatments were applied that day. All plants in the middle two rows of each plot were inspected for TBW 3, 7, and 16 days after foliar treatment (DAT). Data were analyzed via ANOVA (SAS v. 9.3.1), and means were separated via Fisher’s Protected LSD (α = 0.05). TBW densities in all treatments were significantly lower than the UTC 47 days after soil applications. Budworm levels continued to be lower than the UTC for all treatment at 54 DAT (soil)/7 DAT (foliar). However, budworm levels in most treatments combining foliar and soil applied products were not significantly lower than the treatment. Over the final two sample dates, budworm densities in all treatments increased to the point where UTC and insecticide treatments were not significantly different. This research was supported by industry gifts of product and research funding. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F78 Table 1. Proportion TBW infested plants 47 DAT soil/ 50 DAT soil/ 54 DAT soil/ 63 DAT soil/ Product and Application Method Rate Pre-treat foliar 3 DAT foliar 7 DAT foliar 16 DAT foliar UTC n/a 0.14b 0.20c 0.37a 0.73a Admire Pro PTTD + 0.6 fl oz/1000 plants + Coragen TPW + 7 fl oz/acre + HGW86 foliar at threshold 10.1 fl oz/acre 0.04a 0.08b 0.25a 0.55a Admire Pro PTTD + 0.6 fl oz/1000 plants + Coragen TPW + 7 fl oz/acre + HGW86 foliar at threshold 13.5 fl oz/acre 0.03a 0.03ab 0.18a 0.69a Admire Pro PTTD + 0.6 fl oz/1000 plants + Coragen TPW + 7 fl oz/acre + HGW86 foliar at threshold 20.5 fl oz/acre 0.03a 0.03ab 0.19a 0.64a Admire Pro PTTD + TPW 0.6 fl oz/1000 plants + 7 fl oz/acre 0.01a 0.03ab 0.12a 0.63a Coragen TPW + HGW86 foliar at threshold 7 fl oz/acre + 10.1 fl oz/acre 0.02a 0.02a 0.17a 0.58a Means followed by the same letter are not significantly different (α = 0.05) via Fisher’s Protected LSD. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

TOBACCO BUDWORM CONTROL WITH UNREGISTERED FOLIAR MATERIALS, 2012

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
DOI
10.4182/amt.2013.F78
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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F78 (F78) TOBACCO: Nicotiana tobacum, ‘NC196’ Aurora Toennisson Department of Entomology North Carolina State University Campus Box 7634 Raleigh, NC 27695 Phone: 919-513-4344 E-mail: tatoenni@ncsu.edu Clyde Sorenson E-mail: clyde_sorenson@ncsu.edu Hannah Burrack E-mail: hannah_burrack@ncsu.edu Tobacco budworm (TBW): Heliothis virescens (Fabricius) An experiment to assess the efficacy of an unregistered foliar material, HGW86 10SE, at different rates and in combination with soil-applied systemic pesticides against TBW was conducted at the Lower Coastal Plain Research Station near Kinston, NC. Five insecticide treatments plus an untreated check (UTC) were replicated four times and arranged in a RCB design. Each plot consisted of 4, ca. 25 plant, rows and was 0.018 acres. Pre-transplant tray drench (PTTD) treatments were applied in the greenhouse on 16 April in 1 L water using a CO pressurized sprayer fitted with a single flat-fan nozzle. Twice the application volume was used to wash the material into the root zone immediately following treatment. Plants were transplanted and in-furrow transplant water (TWP) treatments were applied in ca. 200 gal per acre of water on 18 April. TBW densities in UTC plots reached 10%, the current economic threshold, on 4 June and foliar treatments were applied that day. All plants in the middle two rows of each plot were inspected for TBW 3, 7, and 16 days after foliar treatment (DAT). Data were analyzed via ANOVA (SAS v. 9.3.1), and means were separated via Fisher’s Protected LSD (α = 0.05). TBW densities in all treatments were significantly lower than the UTC 47 days after soil applications. Budworm levels continued to be lower than the UTC for all treatment at 54 DAT (soil)/7 DAT (foliar). However, budworm levels in most treatments combining foliar and soil applied products were not significantly lower than the treatment. Over the final two sample dates, budworm densities in all treatments increased to the point where UTC and insecticide treatments were not significantly different. This research was supported by industry gifts of product and research funding. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.F78 Table 1. Proportion TBW infested plants 47 DAT soil/ 50 DAT soil/ 54 DAT soil/ 63 DAT soil/ Product and Application Method Rate Pre-treat foliar 3 DAT foliar 7 DAT foliar 16 DAT foliar UTC n/a 0.14b 0.20c 0.37a 0.73a Admire Pro PTTD + 0.6 fl oz/1000 plants + Coragen TPW + 7 fl oz/acre + HGW86 foliar at threshold 10.1 fl oz/acre 0.04a 0.08b 0.25a 0.55a Admire Pro PTTD + 0.6 fl oz/1000 plants + Coragen TPW + 7 fl oz/acre + HGW86 foliar at threshold 13.5 fl oz/acre 0.03a 0.03ab 0.18a 0.69a Admire Pro PTTD + 0.6 fl oz/1000 plants + Coragen TPW + 7 fl oz/acre + HGW86 foliar at threshold 20.5 fl oz/acre 0.03a 0.03ab 0.19a 0.64a Admire Pro PTTD + TPW 0.6 fl oz/1000 plants + 7 fl oz/acre 0.01a 0.03ab 0.12a 0.63a Coragen TPW + HGW86 foliar at threshold 7 fl oz/acre + 10.1 fl oz/acre 0.02a 0.02a 0.17a 0.58a Means followed by the same letter are not significantly different (α = 0.05) via Fisher’s Protected LSD.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2013

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