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Impact of Lorsban, Verimark, Harvanta, Exirel, Radiant SC, and SPE-120 Against Cabbage Maggot in Radish, 2018

Impact of Lorsban, Verimark, Harvanta, Exirel, Radiant SC, and SPE-120 Against Cabbage Maggot in... Radish | Raphanus sativus Cabbage maggot | Delia radicum (Linnaeus) Beauveria bassina, chlorpyrifos, cyantraniliprole, spinetoram, cyclaniliprole In 2018, an efficacy trial located in Aurora, OR, at the North Willamette Research and Extension Center was conducted to evaluate selected insecticides targeting Delia radicum in radish. Plot size was four rows wide by 30 feet in length with 18 inches between rows and a 1.5-inch spacing within rows. Study was structured as a randomized complete block with four replications. Insecticides included Lorsban in-furrow, Verimark in-furrow, Harvanta in-furrow, Harvanta as a post-plant directed spray, Exirel as a post-plant directed spray, SPE-120 seed treatment, SPE-120 seed treatment plus an SPE-120 post-plant directed spray, Radiant seed treatment, and Radiant post-plant directed spray. Seeds were treated with Thiram fungicide at 0.6 g formulated product per 100 g of seed except for SPE-120 treated seeds. Seeds were planted May 14. In-furrow applications were made at seeding with a vacuum seeder modified with a CO2 delivery system to deliver in-furrow drench applications. Post-plant directed sprays were applied at the 2–3 leaf stage on 18 days after seeding (DAS) using a CO2 backpack sprayer calibrated to deliver 22 gpa at 40 psi through a boom with four TeeJet 8002 flat fan nozzles on a 19-inch spacing. Radish emergence was evaluated at 17 DAS by counting the number of emerged radish plants in each of two 1-m row sections in each plot. Early harvest occurred at 24 DAS with 10 radish plants randomly selected from each plot and rated for cabbage maggot damage. Final harvest was conducted 38 DAS, with 1-m sections from two rows harvested from each plot and each root evaluated for cabbage maggot damage. No phytotoxicity was observed in any treatment. Data were subjected to ANOVA. No significant differences were observed between treatments at any sample date (Table 1).1 Table 1. Group means of emergence and cabbage maggot damage. Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 aApplied in-furrow at planting. bApplied as a directed spray at 18 DAS. cApplied as a seed treatment at 146 mg formulated product per 100 g of seed for SPE-120 and 3.7 g formulated product per 100 g seed for Radiant SC. dApplied as a seed treatment at 146 mg formulated product per 100 g of seed and as a directed spray at 18 DAS. Open in new tab Table 1. Group means of emergence and cabbage maggot damage. Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 aApplied in-furrow at planting. bApplied as a directed spray at 18 DAS. cApplied as a seed treatment at 146 mg formulated product per 100 g of seed for SPE-120 and 3.7 g formulated product per 100 g seed for Radiant SC. dApplied as a seed treatment at 146 mg formulated product per 100 g of seed and as a directed spray at 18 DAS. Open in new tab Footnotes 1 This research was supported in part by industry gifts of pesticide. © The Author(s) 2022. Published by Oxford University Press on behalf of Entomological Society of America. 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 [email protected] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Impact of Lorsban, Verimark, Harvanta, Exirel, Radiant SC, and SPE-120 Against Cabbage Maggot in Radish, 2018

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Publisher
Oxford University Press
Copyright
© The Author(s) 2022. Published by Oxford University Press on behalf of Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/tsac148
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Abstract

Radish | Raphanus sativus Cabbage maggot | Delia radicum (Linnaeus) Beauveria bassina, chlorpyrifos, cyantraniliprole, spinetoram, cyclaniliprole In 2018, an efficacy trial located in Aurora, OR, at the North Willamette Research and Extension Center was conducted to evaluate selected insecticides targeting Delia radicum in radish. Plot size was four rows wide by 30 feet in length with 18 inches between rows and a 1.5-inch spacing within rows. Study was structured as a randomized complete block with four replications. Insecticides included Lorsban in-furrow, Verimark in-furrow, Harvanta in-furrow, Harvanta as a post-plant directed spray, Exirel as a post-plant directed spray, SPE-120 seed treatment, SPE-120 seed treatment plus an SPE-120 post-plant directed spray, Radiant seed treatment, and Radiant post-plant directed spray. Seeds were treated with Thiram fungicide at 0.6 g formulated product per 100 g of seed except for SPE-120 treated seeds. Seeds were planted May 14. In-furrow applications were made at seeding with a vacuum seeder modified with a CO2 delivery system to deliver in-furrow drench applications. Post-plant directed sprays were applied at the 2–3 leaf stage on 18 days after seeding (DAS) using a CO2 backpack sprayer calibrated to deliver 22 gpa at 40 psi through a boom with four TeeJet 8002 flat fan nozzles on a 19-inch spacing. Radish emergence was evaluated at 17 DAS by counting the number of emerged radish plants in each of two 1-m row sections in each plot. Early harvest occurred at 24 DAS with 10 radish plants randomly selected from each plot and rated for cabbage maggot damage. Final harvest was conducted 38 DAS, with 1-m sections from two rows harvested from each plot and each root evaluated for cabbage maggot damage. No phytotoxicity was observed in any treatment. Data were subjected to ANOVA. No significant differences were observed between treatments at any sample date (Table 1).1 Table 1. Group means of emergence and cabbage maggot damage. Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 aApplied in-furrow at planting. bApplied as a directed spray at 18 DAS. cApplied as a seed treatment at 146 mg formulated product per 100 g of seed for SPE-120 and 3.7 g formulated product per 100 g seed for Radiant SC. dApplied as a seed treatment at 146 mg formulated product per 100 g of seed and as a directed spray at 18 DAS. Open in new tab Table 1. Group means of emergence and cabbage maggot damage. Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 Treatment and application method . Rate/acre (oz form.) . 17 DAS . 24 DAS . 38 DAS . Emerged plants per 1 m row . % damaged . % damaged . Untreated check — 14.1 32.5 40.0 Lorsban 75WGa 4.86 15.8 35.0 57.3 Verimarka 13.5 16.0 57.5 51.3 Harvantaa 20.4 14.0 43.3 39.5 Harvantab 20.4 15.9 36.7 47.5 Exirelb 13.5 13.5 51.1 32.2 SPE-120c NA 16.3 32.5 44.4 SPE-120d 2 16.4 45.0 38.2 Radiant SCc NA 15.5 57.5 47.8 Radiant SCb 12 14.8 53.9 50.0 P > F 0.60 0.67 0.23 aApplied in-furrow at planting. bApplied as a directed spray at 18 DAS. cApplied as a seed treatment at 146 mg formulated product per 100 g of seed for SPE-120 and 3.7 g formulated product per 100 g seed for Radiant SC. dApplied as a seed treatment at 146 mg formulated product per 100 g of seed and as a directed spray at 18 DAS. Open in new tab Footnotes 1 This research was supported in part by industry gifts of pesticide. © The Author(s) 2022. Published by Oxford University Press on behalf of Entomological Society of America. 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 [email protected]

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Arthropod Management Tests – Oxford University Press

Published: Dec 31, 2022

Keywords: Radish | Raphanus sativus; Cabbage maggot | Delia radicum (Linnaeus); Beauveria bassina; chlorpyrifos; cyantraniliprole; spinetoram; cyclaniliprole

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