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Efficacy of Selected Foliar Insecticides Against Cotton Aphid in Cotton, 2019 (Test 3)

Efficacy of Selected Foliar Insecticides Against Cotton Aphid in Cotton, 2019 (Test 3) Arthropod Management T ests, 46(1), 2021, 1–1 https://doi.org/10.1093/amt/tsab141 Section F: Field & Cereal Crops COTTON: Gossypium hirsutum (L.), ‘Deltapine 1646 BG2XF’ Efficacy of Selected Foliar Insecticides Against Cotton Aphid in Cotton, 2019 (Test 3) 1,3 2 2 Whitney D. Crow, Angus L. Catchot, and Dung Bao Delta Mississippi Research and Extension Center, Mississippi State University, Stoneville, MS 38776, USA, Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS 39762, USA, and Corresponding author, e-mail: wdc165@msstate.edu Section Editor: Donald Cook Cotton (cottonseed) | Gossypium spp. Cotton aphid/melon aphid | Aphis gossypii (Glover) In 2019, a cotton aphid efficacy trial was conducted to evaluate Data were analyzed with ANOVA and means were separated using seven insecticide treatments and an untreated check in Clarksdale, Fisher’s protected LSD (P ≤ 0.05). MS. This trial was conducted as a randomized completed block de- At 3 DAT, all of the insecticide treatments reduced aphid sign with four replications. Plots were four rows wide by 40 feet in populations below that in the untreated check (Table 1). At 5 DAT, all length on 38-inch centers. Insecticide treatments were applied on 8 of the insecticide treatments, except Sivanto HL (3 oz), and Admire Jul, when aphid populations were present, with a tractor-mounted Pro, reduced aphid densities compared to the untreated check. By sprayed calibrated to deliver 10.0 gpa at 60 psi using TX-6 Hollow 7 DAT, all the insecticide treatments significantly reduced aphids Cone nozzles (2 per row). Aphid populations were evaluated 3, 5, compared to the untreated check with the exception of Admire Pro and 7 days after treatment (DAT). Insecticide efficacy was evaluated at 1.7 oz. The lower rate of Admire Pro was not significantly dif- by counting the total number of aphids on five leaves per plot. ferent from the higher rate of Admire Pro. Table 1. Treatment/formulation Rate/acre Average number of cotton fl oz prod. aphids per five leaves 3 DAT 5 DAT 7 DAT Untreated check — 458.3a 251.3a 55.9a Sivanto Prime 1.67L 5.0 33.5b 9.3bc 2.7cd Sivanto HL 3.34L 2.5 9.5b 2.7cd 1.2cd Sivanto HL 3.34L 3.0 11.8b 37.6ab 3.8cd Transform 50WG 0.75 5.5b 0.4d 0.6d Admire Pro 4.6SC 1.7 82.3b 146a 23.9ab Admire Pro 4.6SC 3.4 52.3b 49ab 10.7bc Strafer Max 70WP 1.1 18.5b 3.9cd 1.9cd P > F 0.01 0.02 0.01 Means within a column sharing the same letter are not significantly different (LSD; P > 0.05). oz product (wt.)/acre. This study was supported by industry gifts of products and/or research funding. © The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. 1 This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/ licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Efficacy of Selected Foliar Insecticides Against Cotton Aphid in Cotton, 2019 (Test 3)

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Oxford University Press
Copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/tsab141
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Abstract

Arthropod Management T ests, 46(1), 2021, 1–1 https://doi.org/10.1093/amt/tsab141 Section F: Field & Cereal Crops COTTON: Gossypium hirsutum (L.), ‘Deltapine 1646 BG2XF’ Efficacy of Selected Foliar Insecticides Against Cotton Aphid in Cotton, 2019 (Test 3) 1,3 2 2 Whitney D. Crow, Angus L. Catchot, and Dung Bao Delta Mississippi Research and Extension Center, Mississippi State University, Stoneville, MS 38776, USA, Department of Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS 39762, USA, and Corresponding author, e-mail: wdc165@msstate.edu Section Editor: Donald Cook Cotton (cottonseed) | Gossypium spp. Cotton aphid/melon aphid | Aphis gossypii (Glover) In 2019, a cotton aphid efficacy trial was conducted to evaluate Data were analyzed with ANOVA and means were separated using seven insecticide treatments and an untreated check in Clarksdale, Fisher’s protected LSD (P ≤ 0.05). MS. This trial was conducted as a randomized completed block de- At 3 DAT, all of the insecticide treatments reduced aphid sign with four replications. Plots were four rows wide by 40 feet in populations below that in the untreated check (Table 1). At 5 DAT, all length on 38-inch centers. Insecticide treatments were applied on 8 of the insecticide treatments, except Sivanto HL (3 oz), and Admire Jul, when aphid populations were present, with a tractor-mounted Pro, reduced aphid densities compared to the untreated check. By sprayed calibrated to deliver 10.0 gpa at 60 psi using TX-6 Hollow 7 DAT, all the insecticide treatments significantly reduced aphids Cone nozzles (2 per row). Aphid populations were evaluated 3, 5, compared to the untreated check with the exception of Admire Pro and 7 days after treatment (DAT). Insecticide efficacy was evaluated at 1.7 oz. The lower rate of Admire Pro was not significantly dif- by counting the total number of aphids on five leaves per plot. ferent from the higher rate of Admire Pro. Table 1. Treatment/formulation Rate/acre Average number of cotton fl oz prod. aphids per five leaves 3 DAT 5 DAT 7 DAT Untreated check — 458.3a 251.3a 55.9a Sivanto Prime 1.67L 5.0 33.5b 9.3bc 2.7cd Sivanto HL 3.34L 2.5 9.5b 2.7cd 1.2cd Sivanto HL 3.34L 3.0 11.8b 37.6ab 3.8cd Transform 50WG 0.75 5.5b 0.4d 0.6d Admire Pro 4.6SC 1.7 82.3b 146a 23.9ab Admire Pro 4.6SC 3.4 52.3b 49ab 10.7bc Strafer Max 70WP 1.1 18.5b 3.9cd 1.9cd P > F 0.01 0.02 0.01 Means within a column sharing the same letter are not significantly different (LSD; P > 0.05). oz product (wt.)/acre. This study was supported by industry gifts of products and/or research funding. © The Author(s) 2021. Published by Oxford University Press on behalf of Entomological Society of America. 1 This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/ licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

Journal

Arthropod Management TestsOxford University Press

Published: Oct 18, 2021

Keywords: Cotton (cottonseed) | Gossypium spp; Cotton aphid/melon aphid | Aphis gossypii (Glover); flupyradifurone; sulfoxaflor; imidacloprid

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