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Efficacy of Three Foliar Insecticides Against Sesame Leafroller in Sesame, 2020

Efficacy of Three Foliar Insecticides Against Sesame Leafroller in Sesame, 2020 applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 46(1), 2021, 1–2 doi: 10.1093/amt/tsab042 Section F: Field & Cereal Crops Sesame: Sesamum indicum L. HeadA=HeadB=HeadA=HeadB/HeadA HeadB=HeadC=HeadB=HeadC/HeadB Efficacy of Three Foliar Insecticides Against Sesame HeadC=HeadD=HeadC=HeadD/HeadC Extract3=HeadA=Extract1=HeadA Leafroller in Sesame, 2020 History=Text=History=Text_First Holly N. Davis and Webb Wallace EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB Texas A&M University, Texas AgriLife Research and Extension Center, Weslaco, TX 78596, USA and Corresponding author, e-mail: holly.davis@ag.tamu.edu EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA Section Editor: Jawwad Qureshi ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA Sesame | Sesamum indicum ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB Sesame leafroller | Antigastra catalaunalis ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA During the growing season of 2020, the sesame leafroller (SLR) were analyzed using ANOVA and mean comparisons made by became a significant pest of sesame throughout Texas and into LSD (P ≤ 0.05). Oklahoma. No efficacy data were available to determine how well In both trials, Mustang Maxx provided significantly better foliar insecticides work against SLR. Two trials were conducted in control of SLR at 3 DAT than the untreated check but signifi- grower fields in Hidalgo County, TX, with significant SLR pres- cantly less control than both rates of Prevathon or Blackhawk sure. At the first location, plants were at the three-leaf stage when (Tables 1 and 2). At 7 DAT in trial 1, the Mustang Maxx treat- treated on 12 June (Table 1). Plots were four rows (12 ft.) wide ment still had significantly fewer SLR than the untreated check by 60 ft. long with four replications arranged in an RCB design. and was not significantly different in effectiveness from Prevathon The trial was concluded when no more larvae were detected in or Blackhawk treatments. Conversely, in trial 2 at 7 and 13 DAT, check plots. At the second location, treatments were applied on the Mustang Maxx treatment no longer had significantly fewer 10 July when plants were at the four-leaf stage (Table 2). Plots SLR larvae than the untreated check plots. In trial 1 and 2 SLR, were four rows (12 ft.) wide by 30 ft. long with four replications populations were significantly less than the untreated check at 3 arranged in an RCB design. The trial was concluded when high and 7 DAT in the 8 and 12 oz/acre treatments of Prevathon as winds and flooding associated with Hurricane Hanna destroyed well as the 1.1 and 2.2 oz/acre Blackhawk treatments (Tables 1 the plots on 25 July. Treatments were applied using a backpack and 2). However, at 13 DAT in trial 2, there were no significant sprayer delivering 15.7 gpa at 30 psi through XR TeeJet 11002 differences between treatments although small larvae began to be VS nozzles. detected in both Blackhawk treatments, suggesting that there was Insecticides, application rates, and evaluations are provided no residual control. Even though the lower rates of Prevathon in Tables 1 and 2. At both locations, treatment efficacy was de- tested here appeared to give good control through 7 DAT, it is ex- termined by counting the number of live larvae in 10 randomly pected that the labeled rate of 14–20 oz/acre will provide longer selected plants from the center two rows of each plot. Pretreatment residual control of these larvae, which are known to have multiple counts averaged between 5.3 and 6.8 larvae per 10 plants. Data generations throughout the season. This research was supported in part by industry gifts. © 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 2 Arthropod Management T ests, 2021, Vol. 46, No. 1 Table 1. Table 2. Mean no. SLR Mean no. SLR larvae/10 plants larvae/10 plants Treatment/form. 12 June 2020 Rate/acre 3 DAT 7 DAT Treatment/form 10 July 2020 Rate/acre 3 DAT 7 DAT 13 DAT Untreated check 6.5a 4.0a Untreated check 5.8a 6.3a 3.3 a,b a,b Mustang Maxx EC 4.0 2.5b 1.8b Mustang Maxx EC 4.0 4.0b 3.5a 3.0 a,b a,b Prevathon SC 8.0 0.5c 0.3b Prevathon SC 8.0 0.8c 0.0b 0.8 a,b a,b Prevathon SC 12.0 0.3c 0.3b Prevathon SC 12.0 0.5c 0.0b 0.8 a,c a,c Blackhawk WG 1.1 0.0c 0.3b Blackhawk WG 1.1 0.5c 0.3b 2.8 a,c a,c Blackhawk WG 2.2 0.0c 0.0b Blackhawk WG 2.2 0.0c 0.0b 1.3 P > F <0.01 <0.01 P > F <0.01 <0.01 0.06 Means within columns followed by a common letter are not significantly dif- Means within columns followed by a common letter are not significantly dif- ferent (P ≤ 0.05, LSD). ferent (P ≤ 0.05, LSD). a a Dyne-Amic @ 0.25% v/v was included with each treatment. Dyne-Amic @ 0.25% v/v was included with each treatment. b b fl oz/acre. fl oz/acre. c c oz wt/acre. oz wt/acre. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Efficacy of Three Foliar Insecticides Against Sesame Leafroller in Sesame, 2020

Davis, Holly N; Wallace, Webb
Arthropod Management Tests , Volume 46 (1): 1 – Mar 10, 2021
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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/tsab042
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Abstract

applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 46(1), 2021, 1–2 doi: 10.1093/amt/tsab042 Section F: Field & Cereal Crops Sesame: Sesamum indicum L. HeadA=HeadB=HeadA=HeadB/HeadA HeadB=HeadC=HeadB=HeadC/HeadB Efficacy of Three Foliar Insecticides Against Sesame HeadC=HeadD=HeadC=HeadD/HeadC Extract3=HeadA=Extract1=HeadA Leafroller in Sesame, 2020 History=Text=History=Text_First Holly N. Davis and Webb Wallace EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB Texas A&M University, Texas AgriLife Research and Extension Center, Weslaco, TX 78596, USA and Corresponding author, e-mail: holly.davis@ag.tamu.edu EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA Section Editor: Jawwad Qureshi ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA Sesame | Sesamum indicum ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB Sesame leafroller | Antigastra catalaunalis ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA During the growing season of 2020, the sesame leafroller (SLR) were analyzed using ANOVA and mean comparisons made by became a significant pest of sesame throughout Texas and into LSD (P ≤ 0.05). Oklahoma. No efficacy data were available to determine how well In both trials, Mustang Maxx provided significantly better foliar insecticides work against SLR. Two trials were conducted in control of SLR at 3 DAT than the untreated check but signifi- grower fields in Hidalgo County, TX, with significant SLR pres- cantly less control than both rates of Prevathon or Blackhawk sure. At the first location, plants were at the three-leaf stage when (Tables 1 and 2). At 7 DAT in trial 1, the Mustang Maxx treat- treated on 12 June (Table 1). Plots were four rows (12 ft.) wide ment still had significantly fewer SLR than the untreated check by 60 ft. long with four replications arranged in an RCB design. and was not significantly different in effectiveness from Prevathon The trial was concluded when no more larvae were detected in or Blackhawk treatments. Conversely, in trial 2 at 7 and 13 DAT, check plots. At the second location, treatments were applied on the Mustang Maxx treatment no longer had significantly fewer 10 July when plants were at the four-leaf stage (Table 2). Plots SLR larvae than the untreated check plots. In trial 1 and 2 SLR, were four rows (12 ft.) wide by 30 ft. long with four replications populations were significantly less than the untreated check at 3 arranged in an RCB design. The trial was concluded when high and 7 DAT in the 8 and 12 oz/acre treatments of Prevathon as winds and flooding associated with Hurricane Hanna destroyed well as the 1.1 and 2.2 oz/acre Blackhawk treatments (Tables 1 the plots on 25 July. Treatments were applied using a backpack and 2). However, at 13 DAT in trial 2, there were no significant sprayer delivering 15.7 gpa at 30 psi through XR TeeJet 11002 differences between treatments although small larvae began to be VS nozzles. detected in both Blackhawk treatments, suggesting that there was Insecticides, application rates, and evaluations are provided no residual control. Even though the lower rates of Prevathon in Tables 1 and 2. At both locations, treatment efficacy was de- tested here appeared to give good control through 7 DAT, it is ex- termined by counting the number of live larvae in 10 randomly pected that the labeled rate of 14–20 oz/acre will provide longer selected plants from the center two rows of each plot. Pretreatment residual control of these larvae, which are known to have multiple counts averaged between 5.3 and 6.8 larvae per 10 plants. Data generations throughout the season. This research was supported in part by industry gifts. © 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 2 Arthropod Management T ests, 2021, Vol. 46, No. 1 Table 1. Table 2. Mean no. SLR Mean no. SLR larvae/10 plants larvae/10 plants Treatment/form. 12 June 2020 Rate/acre 3 DAT 7 DAT Treatment/form 10 July 2020 Rate/acre 3 DAT 7 DAT 13 DAT Untreated check 6.5a 4.0a Untreated check 5.8a 6.3a 3.3 a,b a,b Mustang Maxx EC 4.0 2.5b 1.8b Mustang Maxx EC 4.0 4.0b 3.5a 3.0 a,b a,b Prevathon SC 8.0 0.5c 0.3b Prevathon SC 8.0 0.8c 0.0b 0.8 a,b a,b Prevathon SC 12.0 0.3c 0.3b Prevathon SC 12.0 0.5c 0.0b 0.8 a,c a,c Blackhawk WG 1.1 0.0c 0.3b Blackhawk WG 1.1 0.5c 0.3b 2.8 a,c a,c Blackhawk WG 2.2 0.0c 0.0b Blackhawk WG 2.2 0.0c 0.0b 1.3 P > F <0.01 <0.01 P > F <0.01 <0.01 0.06 Means within columns followed by a common letter are not significantly dif- Means within columns followed by a common letter are not significantly dif- ferent (P ≤ 0.05, LSD). ferent (P ≤ 0.05, LSD). a a Dyne-Amic @ 0.25% v/v was included with each treatment. Dyne-Amic @ 0.25% v/v was included with each treatment. b b fl oz/acre. fl oz/acre. c c oz wt/acre. oz wt/acre.

Journal

Arthropod Management Tests – Oxford University Press

Published: Mar 10, 2021

Keywords: Sesame | Sesamum indicum; Sesame leafroller | Antigastra catalaunalis; chlorantraniliprole; spinosad; zeta-cypermethrin

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