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Evaluation of Insecticidal Seed Treatments and Foliar Applied Insecticides Against Rice Billbug in Louisiana Row Rice, 2020

Evaluation of Insecticidal Seed Treatments and Foliar Applied Insecticides Against Rice Billbug... Downloaded from https://academic.oup.com/amt/article/46/1/tsab073/6224658 by DeepDyve user on 20 April 2021 applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 46(1), 2021, 1–2 doi: 10.1093/amt/tsab073 Section F: Field & Cereal Crops RICE: Oryza sativa L. ‘RiceTec RT7521 FP’ HeadA=HeadB=HeadA=HeadB/HeadA HeadB=HeadC=HeadB=HeadC/HeadB Evaluation of Insecticidal Seed Treatments and Foliar HeadC=HeadD=HeadC=HeadD/HeadC Extract3=HeadA=Extract1=HeadA Applied Insecticides Against Rice Billbug in Louisiana History=Text=History=Text_First Row Rice, 2020 EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA 1, 2,5, 3 4 EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB James M. Villegas, Blake E. Wilson, Sebe A. Brown, and Josh T. Copes EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC 1 2 Department of Entomology, LSU AgCenter, Baton Rouge, LA 70803, Sugar Research Station, LSU AgCenter, St. Gabriel, LA 70776, EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA 3 4 Dean Lee Research & Extension Center, LSU AgCenter, Alexandria, LA 71302, Northeast Research Station, LSU AgCenter, St. Joseph, LA 71366, and Corresponding author, e-mail: bwilson@agcenter.lsu.edu ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB Section Editor: Whitney Crow ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC Rice | Oryza sativa; glaberrima ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA Rice billbug | Sphenophorus pertinax (Olivier) Rice billbug is a pest of increasing concern in furrow-irrigated weed control, and other agronomic practices for row rice pro- (row rice) with potential to cause substantial yield losses, partic- duction in Louisiana. Plant stand was evaluated at 4  wk after ularly under severe infestations. Billbug feeding at the bases of planting by counting the number of rice plants in the middle of rice plants can result in plant death (in younger rice plants) or a row per plot (10-ft). One root/soil core sample per plot were whiteheads (blank panicles). Data on the control of rice billbug in taken on 1 Jul 2020 to determine densities of rice water weevil. row rice is limited. This field trial was conducted to investigate the Each core sample, which contained a minimum of one rice plant efficacy of insecticidal seed treatments and foliar-applied insecti- with intact roots, was processed by washing the soil from roots cide against rice billbug at the LSU AgCenter Northeast Research in sieve mesh buckets. Buckets were placed in basins of salt-water Station in St. Joseph, Louisiana. Seeds of long-grain hybrid rice solution and immature weevils were counted as they floated to the cultivar ‘RiceTec RT7521 FP’ were planted at a seeding rate of 25 surface. Billbug injury was assessed by recording the total number - lb/acre on 1 May 2020. Plots were 6 ft wide and 16 ft in length of whiteheads/blank panicles in each plot at 100% heading on with 2 rows at 3-ft spacing. Prior to planting, seeds were treated 4 Sep 2020. At grain maturity, entire plots were harvested with with Cruiser 5FS (AI: thiamethoxam, two rates, labeled or 8-fold small-plot combine and rough rice grain weights were adjusted to labeled rate), Dermacor X-100 (AI: chlorantraniliprole, two rates, 12% moisture. Data were analyzed separately using generalized labeled or 2-fold labeled rate), Fortenza (AI: cyantraniliprole, la- linear mixed models with insecticide treatment as fixed effect and beled rate), NipsIt (AI: clothianidin, labeled rate), a combination block as a random effect using PROC GLIMMIX in SAS. Means of Dermacor X-100 and Cruiser 5FS (both labeled rate), and a were separated using Tukey’s HSD. combination of Fortenza and Cruiser 5FS (both labeled rate). Seed There were no differences among insecticide treatments on treatment rates were calculated based on seeding rate and rate of plant stand (data not presented). Rice water weevil densities insecticide per 100 lb of seed. Aside from seed treatments, a sep- were very low (<1 per core) and did not differ among treatments arate foliar insecticidal treatment (Belay, AI: clothianidin, labeled (data not presented). Insecticide treatments influenced the den- rate) was applied on 1 Jul 2020 at maximum tillering to early boot sity of billbug injury (Table 1). Belay, Dermacor (2-fold labeled stage using a CO -pressurized backpack sprayer calibrated to de- rate), and Cruiser (8-fold labeled rate) resulted in lower billbug liver 15 gpa at 30 psi. The sprayer was equipped with three Teejet injury indicated by low whitehead density compared to NipsIt or TP11001 nozzles at 8-inch spacing. The 10 treatments (eight seed the Untreated Check. None of the insecticide treatments resulted treatments, one foliar treatment, and an untreated check) were in higher yields compared to Untreated Check. However, higher arranged in a randomized block design with four replicates. Plots yields were observed in plots treated with Belay compared to those were maintained in accordance with recommended fertilization, treated with NipsIt. This research was partially supported by industry and rice research checkoff funds. © 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 Downloaded from https://academic.oup.com/amt/article/46/1/tsab073/6224658 by DeepDyve user on 20 April 2021 2 Arthropod Management T ests, 2021, Vol. 46, No. 1 Table 1. Treatment/ Rate/acre Whitehead Yield formulation (fl oz) (per 0.0028 acre plots) (lb/acre) Cruiser 5FS 0.92 30.6abc 8108.0ab Cruiser 5FS 7.36 12.5de 8313.8ab Dermacor 5.21FS 1.5 22.7bcd 8287.2ab Dermacor 5.21FS 3 14.7de 8626.6ab Fortenza 5FS 0.87 24.9bcd 8058.4ab NipsIt 5FS 0.48 39.7a 7063.4b Dermacor 5.21FS 1.5 + 0.92 19.3cde 8607.5ab + Cruiser 5FS Fortenza 5FS + 0.87 + 0.92 37.4ab 8101.6ab Cruiser 5FS Belay 2.13SC 4.0 4.5e 9308.8a Untreated Check - 34.0abc 8593.3ab P <0.01 0.02 Means within a column followed by the same letter are not significantly dif- ferent (P > 0.05, Tukey’s HSD). Seed treatment; rate calculated based on seeding rate and insecticide rate per 100 lb seed. Foliar application on 1 Jul 2020. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Evaluation of Insecticidal Seed Treatments and Foliar Applied Insecticides Against Rice Billbug in Louisiana Row Rice, 2020

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Oxford University Press
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Copyright © 2021 Entomological Society of America
eISSN
2155-9856
DOI
10.1093/amt/tsab073
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Abstract

Downloaded from https://academic.oup.com/amt/article/46/1/tsab073/6224658 by DeepDyve user on 20 April 2021 applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Arthropod Management T ests, 46(1), 2021, 1–2 doi: 10.1093/amt/tsab073 Section F: Field & Cereal Crops RICE: Oryza sativa L. ‘RiceTec RT7521 FP’ HeadA=HeadB=HeadA=HeadB/HeadA HeadB=HeadC=HeadB=HeadC/HeadB Evaluation of Insecticidal Seed Treatments and Foliar HeadC=HeadD=HeadC=HeadD/HeadC Extract3=HeadA=Extract1=HeadA Applied Insecticides Against Rice Billbug in Louisiana History=Text=History=Text_First Row Rice, 2020 EDI_HeadA=EDI_HeadB=EDI_HeadA=EDI_HeadB/HeadA 1, 2,5, 3 4 EDI_HeadB=EDI_HeadC=EDI_HeadB=EDI_HeadC/HeadB James M. Villegas, Blake E. Wilson, Sebe A. Brown, and Josh T. Copes EDI_HeadC=EDI_HeadD=EDI_HeadC=EDI_HeadD/HeadC 1 2 Department of Entomology, LSU AgCenter, Baton Rouge, LA 70803, Sugar Research Station, LSU AgCenter, St. Gabriel, LA 70776, EDI_Extract3=EDI_HeadA=EDI_Extract1=EDI_HeadA 3 4 Dean Lee Research & Extension Center, LSU AgCenter, Alexandria, LA 71302, Northeast Research Station, LSU AgCenter, St. Joseph, LA 71366, and Corresponding author, e-mail: bwilson@agcenter.lsu.edu ERR_HeadA=ERR_HeadB=ERR_HeadA=ERR_HeadB/HeadA ERR_HeadB=ERR_HeadC=ERR_HeadB=ERR_HeadC/HeadB Section Editor: Whitney Crow ERR_HeadC=ERR_HeadD=ERR_HeadC=ERR_HeadD/HeadC Rice | Oryza sativa; glaberrima ERR_Extract3=ERR_HeadA=ERR_Extract1=ERR_HeadA Rice billbug | Sphenophorus pertinax (Olivier) Rice billbug is a pest of increasing concern in furrow-irrigated weed control, and other agronomic practices for row rice pro- (row rice) with potential to cause substantial yield losses, partic- duction in Louisiana. Plant stand was evaluated at 4  wk after ularly under severe infestations. Billbug feeding at the bases of planting by counting the number of rice plants in the middle of rice plants can result in plant death (in younger rice plants) or a row per plot (10-ft). One root/soil core sample per plot were whiteheads (blank panicles). Data on the control of rice billbug in taken on 1 Jul 2020 to determine densities of rice water weevil. row rice is limited. This field trial was conducted to investigate the Each core sample, which contained a minimum of one rice plant efficacy of insecticidal seed treatments and foliar-applied insecti- with intact roots, was processed by washing the soil from roots cide against rice billbug at the LSU AgCenter Northeast Research in sieve mesh buckets. Buckets were placed in basins of salt-water Station in St. Joseph, Louisiana. Seeds of long-grain hybrid rice solution and immature weevils were counted as they floated to the cultivar ‘RiceTec RT7521 FP’ were planted at a seeding rate of 25 surface. Billbug injury was assessed by recording the total number - lb/acre on 1 May 2020. Plots were 6 ft wide and 16 ft in length of whiteheads/blank panicles in each plot at 100% heading on with 2 rows at 3-ft spacing. Prior to planting, seeds were treated 4 Sep 2020. At grain maturity, entire plots were harvested with with Cruiser 5FS (AI: thiamethoxam, two rates, labeled or 8-fold small-plot combine and rough rice grain weights were adjusted to labeled rate), Dermacor X-100 (AI: chlorantraniliprole, two rates, 12% moisture. Data were analyzed separately using generalized labeled or 2-fold labeled rate), Fortenza (AI: cyantraniliprole, la- linear mixed models with insecticide treatment as fixed effect and beled rate), NipsIt (AI: clothianidin, labeled rate), a combination block as a random effect using PROC GLIMMIX in SAS. Means of Dermacor X-100 and Cruiser 5FS (both labeled rate), and a were separated using Tukey’s HSD. combination of Fortenza and Cruiser 5FS (both labeled rate). Seed There were no differences among insecticide treatments on treatment rates were calculated based on seeding rate and rate of plant stand (data not presented). Rice water weevil densities insecticide per 100 lb of seed. Aside from seed treatments, a sep- were very low (<1 per core) and did not differ among treatments arate foliar insecticidal treatment (Belay, AI: clothianidin, labeled (data not presented). Insecticide treatments influenced the den- rate) was applied on 1 Jul 2020 at maximum tillering to early boot sity of billbug injury (Table 1). Belay, Dermacor (2-fold labeled stage using a CO -pressurized backpack sprayer calibrated to de- rate), and Cruiser (8-fold labeled rate) resulted in lower billbug liver 15 gpa at 30 psi. The sprayer was equipped with three Teejet injury indicated by low whitehead density compared to NipsIt or TP11001 nozzles at 8-inch spacing. The 10 treatments (eight seed the Untreated Check. None of the insecticide treatments resulted treatments, one foliar treatment, and an untreated check) were in higher yields compared to Untreated Check. However, higher arranged in a randomized block design with four replicates. Plots yields were observed in plots treated with Belay compared to those were maintained in accordance with recommended fertilization, treated with NipsIt. This research was partially supported by industry and rice research checkoff funds. © 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 Downloaded from https://academic.oup.com/amt/article/46/1/tsab073/6224658 by DeepDyve user on 20 April 2021 2 Arthropod Management T ests, 2021, Vol. 46, No. 1 Table 1. Treatment/ Rate/acre Whitehead Yield formulation (fl oz) (per 0.0028 acre plots) (lb/acre) Cruiser 5FS 0.92 30.6abc 8108.0ab Cruiser 5FS 7.36 12.5de 8313.8ab Dermacor 5.21FS 1.5 22.7bcd 8287.2ab Dermacor 5.21FS 3 14.7de 8626.6ab Fortenza 5FS 0.87 24.9bcd 8058.4ab NipsIt 5FS 0.48 39.7a 7063.4b Dermacor 5.21FS 1.5 + 0.92 19.3cde 8607.5ab + Cruiser 5FS Fortenza 5FS + 0.87 + 0.92 37.4ab 8101.6ab Cruiser 5FS Belay 2.13SC 4.0 4.5e 9308.8a Untreated Check - 34.0abc 8593.3ab P <0.01 0.02 Means within a column followed by the same letter are not significantly dif- ferent (P > 0.05, Tukey’s HSD). Seed treatment; rate calculated based on seeding rate and insecticide rate per 100 lb seed. Foliar application on 1 Jul 2020.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2021

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