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Evaluation of Intrepid Edge for Control of the Sugarcane Borer in Louisiana Sugarcane, 2019

Evaluation of Intrepid Edge for Control of the Sugarcane Borer in Louisiana Sugarcane, 2019 Downloaded from https://academic.oup.com/amt/article-abstract/45/1/tsaa056/5831139 by DeepDyve user on 13 May 2020 applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 45(1), 2020, 1–2 doi: 10.1093/amt/tsaa056 Section F: Field & Cereal Crops SUGARCANE: Saccharum officinarum, ‘HoCP 00-950’ Evaluation of Intrepid Edge for Control of the Sugarcane HeadA=HeadB=HeadA=HeadB/HeadA Borer in Louisiana Sugarcane, 2019 HeadB=HeadC=HeadB=HeadC/HeadB 1,3, 2 1 HeadC=HeadD=HeadC=HeadD/HeadC James M. Villegas, Blake E. Wilson, and Leonardo D. Salgado Extract3=HeadA=Extract1=HeadA Louisiana State University Agricultural Center, Department of Entomology, 404 Life Sciences Building-LSU, Baton Rouge, History=Text=History=Text_First Louisiana 70803. Phone: (225) 578-1634, Louisiana State University Agricultural Center, Sugar Research Station, 5755 LSU Ag Road, St. Gabriel, Louisiana 70776. Phone: (225) 642-0224, E-mail: (bwilson@agcenter.lsu.edu, lsalgado@agcenter.lsu.edu) and EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA Corresponding author, e-mail: jvillegas@agcenter.lsu.edu EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB Section Editor: Clyde Sorenson EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA Sugarcane borer | Diatraea saccharalis (F.) ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA Sugarcane | Saccharum officinarum ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC A field trial was conducted to investigate the efficacy of Intrepid holes were recorded. Percentage bored internodes was calculated for Edge for control of the sugarcane borer (SCB) on a stemborer sus- each sample prior to analysis. Percentage of bored internodes was also ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA ceptible sugarcane variety (HoCP 00-950, 1st ratoon) at the LSU calculated for the bottom (internodes 1–5), middle (internodes 6–10), AgCenter Sugar Research Station in St. Gabriel, Louisiana. Two and top (internodes >11) of stalks to approximate the point during the rates of Intrepid Edge (AI: methoxyfenozide and spinetoram), one growing season when injury occurred. Percentage bored internode and rate of Prevathon (AI: chlorantraniliprole), and an untreated check emergence per stalk data were analyzed with generalized linear-mixed were evaluated in a randomized block design with six replications. models (SAS PROC GLIMMIX) with treatment as a fixed effect and Treatment plots consisted of two 24-ft rows (0.006 acre) separated replication as a random effect. Kenward–Roger adjustment was used by 5-ft gaps. To increase pest pressure, corn was intercropped with to calculate error degrees of freedom and means were separated with sugarcane on every third row. Corn was inoculated with laboratory- Tukey’s HSD. reared SCB larvae on 15 Jun and ants were suppressed with granular All insecticide treatments reduced the percentage of bored baits to maintain high SCB pressure. Sugarcane plants were scouted internodes (whole stalk) and adult emergence relative to untreated on 25 Jul and 28% of stalks were infested with larvae feeding in check, but differences were not detected among treatments (Table 1). the leaf sheaths. Insecticides, with Induce® surfactant, were applied All treatments also reduced injury to the middle internodes corre- 1 ft above the sugarcane canopy on 26 Jul using a CO -pressurized sponding to infestations occurring in late July to mid-August as back pack sprayer calibrated to deliver 15 gpa at 30 psi. The sprayer well as injury to top internodes likely sustained in late August and was equipped with eight Teejet TP11001 nozzles spaced 18-in apart. September. Failure of insecticide treatments to reduce injury in No rain was documented over the 3 days following the application. bottom internodes indicates some injury was present prior to the Sugarcane was exposed to enhanced infestations for the remainder of application or that the products failed to cause mortality of older the growing season. Samples (12 random stalks in each plot) were col- larvae prior to stalk entry. Results suggest Intrepid Edge can provide lected for determination of SCB injury on 9 Oct. Leaves were stripped effective control of SCB infestations, but applications may need to be and the numbers of total internodes, bored internodes, and emergence well timed to target young larvae. This research was partially supported by industry gifts and research funds. © The Author(s) 2020. 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 Non-Commercial 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 Downloaded from https://academic.oup.com/amt/article-abstract/45/1/tsaa056/5831139 by DeepDyve user on 13 May 2020 2 Arthropod Management T ests, 2020, Vol. 45, No. 1 Table 1. Treatment/formulation Rate Percent bored Emergence per stalk (fl oz/acre) Internodes Bottom Middle Top Untreated check NA 18.9a 13.3 24.7a 18.4a 1.2a Intrepid Edge 4.8 8.0b 8.6 6.9b 8.9b 0.3b Intrepid Edge 9.6 7.6b 11.9 8.3b 3.0b 0.6b Prevathon 0.43SC 20 2.9b 4.4 2.2b 2.0b 0.1b F 17.3 3.0 20.3 12.3 9.6 P <0.001 0.064 <0.001 <0.001 0.001 Means which share a letter group are not significantly different (Tukeys HSD, α = 0.05). Whole stalk. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Evaluation of Intrepid Edge for Control of the Sugarcane Borer in Louisiana Sugarcane, 2019

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Publisher
Oxford University Press
Copyright
© The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/tsaa056
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/45/1/tsaa056/5831139 by DeepDyve user on 13 May 2020 applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 45(1), 2020, 1–2 doi: 10.1093/amt/tsaa056 Section F: Field & Cereal Crops SUGARCANE: Saccharum officinarum, ‘HoCP 00-950’ Evaluation of Intrepid Edge for Control of the Sugarcane HeadA=HeadB=HeadA=HeadB/HeadA Borer in Louisiana Sugarcane, 2019 HeadB=HeadC=HeadB=HeadC/HeadB 1,3, 2 1 HeadC=HeadD=HeadC=HeadD/HeadC James M. Villegas, Blake E. Wilson, and Leonardo D. Salgado Extract3=HeadA=Extract1=HeadA Louisiana State University Agricultural Center, Department of Entomology, 404 Life Sciences Building-LSU, Baton Rouge, History=Text=History=Text_First Louisiana 70803. Phone: (225) 578-1634, Louisiana State University Agricultural Center, Sugar Research Station, 5755 LSU Ag Road, St. Gabriel, Louisiana 70776. Phone: (225) 642-0224, E-mail: (bwilson@agcenter.lsu.edu, lsalgado@agcenter.lsu.edu) and EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA Corresponding author, e-mail: jvillegas@agcenter.lsu.edu EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB Section Editor: Clyde Sorenson EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA Sugarcane borer | Diatraea saccharalis (F.) ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA Sugarcane | Saccharum officinarum ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC A field trial was conducted to investigate the efficacy of Intrepid holes were recorded. Percentage bored internodes was calculated for Edge for control of the sugarcane borer (SCB) on a stemborer sus- each sample prior to analysis. Percentage of bored internodes was also ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA ceptible sugarcane variety (HoCP 00-950, 1st ratoon) at the LSU calculated for the bottom (internodes 1–5), middle (internodes 6–10), AgCenter Sugar Research Station in St. Gabriel, Louisiana. Two and top (internodes >11) of stalks to approximate the point during the rates of Intrepid Edge (AI: methoxyfenozide and spinetoram), one growing season when injury occurred. Percentage bored internode and rate of Prevathon (AI: chlorantraniliprole), and an untreated check emergence per stalk data were analyzed with generalized linear-mixed were evaluated in a randomized block design with six replications. models (SAS PROC GLIMMIX) with treatment as a fixed effect and Treatment plots consisted of two 24-ft rows (0.006 acre) separated replication as a random effect. Kenward–Roger adjustment was used by 5-ft gaps. To increase pest pressure, corn was intercropped with to calculate error degrees of freedom and means were separated with sugarcane on every third row. Corn was inoculated with laboratory- Tukey’s HSD. reared SCB larvae on 15 Jun and ants were suppressed with granular All insecticide treatments reduced the percentage of bored baits to maintain high SCB pressure. Sugarcane plants were scouted internodes (whole stalk) and adult emergence relative to untreated on 25 Jul and 28% of stalks were infested with larvae feeding in check, but differences were not detected among treatments (Table 1). the leaf sheaths. Insecticides, with Induce® surfactant, were applied All treatments also reduced injury to the middle internodes corre- 1 ft above the sugarcane canopy on 26 Jul using a CO -pressurized sponding to infestations occurring in late July to mid-August as back pack sprayer calibrated to deliver 15 gpa at 30 psi. The sprayer well as injury to top internodes likely sustained in late August and was equipped with eight Teejet TP11001 nozzles spaced 18-in apart. September. Failure of insecticide treatments to reduce injury in No rain was documented over the 3 days following the application. bottom internodes indicates some injury was present prior to the Sugarcane was exposed to enhanced infestations for the remainder of application or that the products failed to cause mortality of older the growing season. Samples (12 random stalks in each plot) were col- larvae prior to stalk entry. Results suggest Intrepid Edge can provide lected for determination of SCB injury on 9 Oct. Leaves were stripped effective control of SCB infestations, but applications may need to be and the numbers of total internodes, bored internodes, and emergence well timed to target young larvae. This research was partially supported by industry gifts and research funds. © The Author(s) 2020. 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 Non-Commercial 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 Downloaded from https://academic.oup.com/amt/article-abstract/45/1/tsaa056/5831139 by DeepDyve user on 13 May 2020 2 Arthropod Management T ests, 2020, Vol. 45, No. 1 Table 1. Treatment/formulation Rate Percent bored Emergence per stalk (fl oz/acre) Internodes Bottom Middle Top Untreated check NA 18.9a 13.3 24.7a 18.4a 1.2a Intrepid Edge 4.8 8.0b 8.6 6.9b 8.9b 0.3b Intrepid Edge 9.6 7.6b 11.9 8.3b 3.0b 0.6b Prevathon 0.43SC 20 2.9b 4.4 2.2b 2.0b 0.1b F 17.3 3.0 20.3 12.3 9.6 P <0.001 0.064 <0.001 <0.001 0.001 Means which share a letter group are not significantly different (Tukeys HSD, α = 0.05). Whole stalk.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2020

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