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Insecticide Efficacy for Control of Banks Grass Mites and Two-Spotted Spider Mites on Corn, 2020

Insecticide Efficacy for Control of Banks Grass Mites and Two-Spotted Spider Mites on Corn, 2020 applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 46(1), 2021, 1–1 doi: 10.1093/amt/tsab014 Section F: Field & Cereal Crops CORN: Zea mays (L.) ‘DKC 67–72 AF’ Insecticide Efficacy for Control of Banks Grass Mites and HeadA=HeadB=HeadA=HeadB/HeadA Two-Spotted Spider Mites on Corn, 2020 HeadB=HeadC=HeadB=HeadC/HeadB HeadC=HeadD=HeadC=HeadD/HeadC Ali A. Zarrabi,  Tom A. Royer, George B. Wallace, S. Kelly Seuhs, Kristopher L. Giles, and Natalie L. Harrison Extract3=HeadA=Extract1=HeadA History=Text=History=Text_First Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK 74078-3033 and Corresponding author, e-mail: ali.zarrabi@okstate.edu EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB Section Editor: Clyde Sorenson EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC Corn (hybrid, maize, sweet) | Zea mays EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA Banks grass mite | Oligonychus pratensis ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA Two-spotted spider mite | Tetranychus urticae ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC An efficacy trial was conducted to evaluate foliar applications of applied through TeeJet XR-8004 VS nozzles on 8 Aug using a tractor- ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA selected miticides for control of a spider mite complex (Banks grass mounted 15 ft. offset spray boom calibrated to deliver 22 gpa @ 40 mites and two-spotted spider mites) in field corn. Corn variety ‘DKC psi while traveling 4 mph. Plots were not irrigated, but received 13.86 67–72 AF’ was planted on 4 Apr at the Cimarron Valley Agricultural in. of rainfall through the duration of the trial. Mite samples consisted Research Station, Perkins, OK. Plots were four rows (30-inch centers) of 4 leaves taken from 4 randomly selected plants from the middle by 30 ft long with 10 ft alleys and border of 10 ft between the plots. two rows of each plot and counted in the laboratory. Pre-treatment Eight treatments were arranged in an RCB with four replications. All samples were taken on 27 Jul and post-treatment samples were taken plots were fertilized on 26 Jun at the rate of 130 lbs. urea/A equivalent on 15 Aug (7 DAT), 22 Aug (14 DAT), 29 Aug (21 DAT), and 5 Sept to 60 lbs. nitrogen/A. All plots were treated with Prevathon 14 oz./A on (28 DAT). Data were analyzed using ANOVA and the means were 26 Jun through an air blast sprayer at 100 gpa to control grasshoppers. separated according to Fisher’s Protected LSD (P ≤ 0.05). In addition, all plots were oversprayed with Asana XL at 4 oz./A on 2 Number of mites in untreated plots continued to increase up to Jul and Warrior II w/Zeon at 1.92 oz./A on 17 Jul as a broadcast spray 28-DAT, but sampling was discontinued due to leaf burning and ne- at 20 gpa to induce an increase in the mite populations. Mites arrived crosis of plants in most plots. All treatments reduced spider mites up on 8 July and treatments were applied on 27 Jul. All treatments were to 28 DAT (Table 1). Table 1. Mean Number of Mites (and % control) Treatment Rate/acre Pre- 7 DAT 14 DAT 21 DAT 28 DAT Untreated N/A 66.9bc 380.6a 427.9a 535.0a 961.3a Zeal SC - Extoxazole 4 oz 98.9ab 97.8b (74.8) 67.5bc (78.0) 129.6bc (76.3) 101.2bc (88.4) Zeal SC-Extoxazole 6 oz 143.0a 27.7b (90.2) 21.3c (96.0) 47.4d (91.0) 110.6bc (88.9) Zeal Pro 12 oz 97.9ab 29.4b (90.2) 79.7bc (65.6) 104.5cd (81.3) 110.1bc (88.3) Zeal Pro 22 oz 142.3a 30.8b (88.8) 146.7b (54.5) 143.1bc (70.9) 196.5b (79.7) Zeal Pro 34.5 oz 82.8bc 69.1b (76.5) 139.2b (56.0) 156.9bc (68.8) 78.8c (91.6) Oberon 4 oz 44.9b 77.9b (74.9) 82.1bc (80.6) 187.4b (62.3) 198.9b (79.1) P>F 0.0007 <.0001 <.0001 <0.0001 <0.0001 Means within columns followed by a common letter are not significantly different (Fisher’s Protected LSD, P>0.05). Induce surfactant included at 0.25% v/v. This research was funded in part by industry grants. © 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 (http://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

Insecticide Efficacy for Control of Banks Grass Mites and Two-Spotted Spider Mites on Corn, 2020

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Publisher
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/tsab014
Publisher site
See Article on Publisher Site

Abstract

applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 46(1), 2021, 1–1 doi: 10.1093/amt/tsab014 Section F: Field & Cereal Crops CORN: Zea mays (L.) ‘DKC 67–72 AF’ Insecticide Efficacy for Control of Banks Grass Mites and HeadA=HeadB=HeadA=HeadB/HeadA Two-Spotted Spider Mites on Corn, 2020 HeadB=HeadC=HeadB=HeadC/HeadB HeadC=HeadD=HeadC=HeadD/HeadC Ali A. Zarrabi,  Tom A. Royer, George B. Wallace, S. Kelly Seuhs, Kristopher L. Giles, and Natalie L. Harrison Extract3=HeadA=Extract1=HeadA History=Text=History=Text_First Department of Entomology and Plant Pathology, Oklahoma State University, Stillwater, OK 74078-3033 and Corresponding author, e-mail: ali.zarrabi@okstate.edu EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB Section Editor: Clyde Sorenson EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC Corn (hybrid, maize, sweet) | Zea mays EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA Banks grass mite | Oligonychus pratensis ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA Two-spotted spider mite | Tetranychus urticae ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC An efficacy trial was conducted to evaluate foliar applications of applied through TeeJet XR-8004 VS nozzles on 8 Aug using a tractor- ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA selected miticides for control of a spider mite complex (Banks grass mounted 15 ft. offset spray boom calibrated to deliver 22 gpa @ 40 mites and two-spotted spider mites) in field corn. Corn variety ‘DKC psi while traveling 4 mph. Plots were not irrigated, but received 13.86 67–72 AF’ was planted on 4 Apr at the Cimarron Valley Agricultural in. of rainfall through the duration of the trial. Mite samples consisted Research Station, Perkins, OK. Plots were four rows (30-inch centers) of 4 leaves taken from 4 randomly selected plants from the middle by 30 ft long with 10 ft alleys and border of 10 ft between the plots. two rows of each plot and counted in the laboratory. Pre-treatment Eight treatments were arranged in an RCB with four replications. All samples were taken on 27 Jul and post-treatment samples were taken plots were fertilized on 26 Jun at the rate of 130 lbs. urea/A equivalent on 15 Aug (7 DAT), 22 Aug (14 DAT), 29 Aug (21 DAT), and 5 Sept to 60 lbs. nitrogen/A. All plots were treated with Prevathon 14 oz./A on (28 DAT). Data were analyzed using ANOVA and the means were 26 Jun through an air blast sprayer at 100 gpa to control grasshoppers. separated according to Fisher’s Protected LSD (P ≤ 0.05). In addition, all plots were oversprayed with Asana XL at 4 oz./A on 2 Number of mites in untreated plots continued to increase up to Jul and Warrior II w/Zeon at 1.92 oz./A on 17 Jul as a broadcast spray 28-DAT, but sampling was discontinued due to leaf burning and ne- at 20 gpa to induce an increase in the mite populations. Mites arrived crosis of plants in most plots. All treatments reduced spider mites up on 8 July and treatments were applied on 27 Jul. All treatments were to 28 DAT (Table 1). Table 1. Mean Number of Mites (and % control) Treatment Rate/acre Pre- 7 DAT 14 DAT 21 DAT 28 DAT Untreated N/A 66.9bc 380.6a 427.9a 535.0a 961.3a Zeal SC - Extoxazole 4 oz 98.9ab 97.8b (74.8) 67.5bc (78.0) 129.6bc (76.3) 101.2bc (88.4) Zeal SC-Extoxazole 6 oz 143.0a 27.7b (90.2) 21.3c (96.0) 47.4d (91.0) 110.6bc (88.9) Zeal Pro 12 oz 97.9ab 29.4b (90.2) 79.7bc (65.6) 104.5cd (81.3) 110.1bc (88.3) Zeal Pro 22 oz 142.3a 30.8b (88.8) 146.7b (54.5) 143.1bc (70.9) 196.5b (79.7) Zeal Pro 34.5 oz 82.8bc 69.1b (76.5) 139.2b (56.0) 156.9bc (68.8) 78.8c (91.6) Oberon 4 oz 44.9b 77.9b (74.9) 82.1bc (80.6) 187.4b (62.3) 198.9b (79.1) P>F 0.0007 <.0001 <.0001 <0.0001 <0.0001 Means within columns followed by a common letter are not significantly different (Fisher’s Protected LSD, P>0.05). Induce surfactant included at 0.25% v/v. This research was funded in part by industry grants. © 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 (http://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: Feb 26, 2021

Keywords: Corn (hybrid, maize, sweet) | Zea mays; Banks grass mite | Oligonychus pratensis; Two-spotted spider mite | Tetranychus urticae; etoxazole; spiromesifen

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