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Thrips Managment on Dry Bulb Onions With the Use of Foliar Insecticide Applications, 2016*

Thrips Managment on Dry Bulb Onions With the Use of Foliar Insecticide Applications, 2016* Onion | Allium cepa onion thrips | Thrips tabaci Onion thrips, Thrips tabaci (Lindeman) Onion thrips are a significantly damaging pest to dry bulb onions in Washington State. An experiment was performed in Pasco, WA to determine insecticide efficacy, starting 28 Jun 2016. The drip irrigated plots were 7.33-ft wide and 25-ft long and arranged in using an RCB design with four replicates per treatment. Insecticide treatments were made with a tractor mounted CO2 pressurized research plot sprayer using 110002 TeeJet® air induction flat fan nozzles at 30 psi. The boom was 20 inches high with 5 nozzles spaced 20 inches apart, applying spray at 30 gpa. Plots were assessed nine days after application for pesticide efficacy. Adult and immature thrips were counted in the field from 10 plants in each plot. The data were analyzed using ANOVA, followed by means separation using Fisher’s protected LSD (P < 0.05). Thrips counts following sampling on 7 Jul 2016 showed significant differences among the six treatments. Radiant was the most effective insecticide among all the treatments (Table 1). By comparison, Movento-, Exirel-, Lannate-, Agrimek-, and Minecto Pro-treated plots had significantly fewer thrips than the untreated check but were not as effective as Radiant. Warrior showed no significant difference from the untreated check (Table 1). Table 1 Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Means within columns not followed by the same letter are statistically significantly different from one another (Fisher’s protected LSD P < 0.05). Table 1 Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Means within columns not followed by the same letter are statistically significantly different from one another (Fisher’s protected LSD P < 0.05). © The Authors 2017. 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 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 [email protected] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Thrips Managment on Dry Bulb Onions With the Use of Foliar Insecticide Applications, 2016*

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Publisher
Oxford University Press
Copyright
© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/tsx081
Publisher site
See Article on Publisher Site

Abstract

Onion | Allium cepa onion thrips | Thrips tabaci Onion thrips, Thrips tabaci (Lindeman) Onion thrips are a significantly damaging pest to dry bulb onions in Washington State. An experiment was performed in Pasco, WA to determine insecticide efficacy, starting 28 Jun 2016. The drip irrigated plots were 7.33-ft wide and 25-ft long and arranged in using an RCB design with four replicates per treatment. Insecticide treatments were made with a tractor mounted CO2 pressurized research plot sprayer using 110002 TeeJet® air induction flat fan nozzles at 30 psi. The boom was 20 inches high with 5 nozzles spaced 20 inches apart, applying spray at 30 gpa. Plots were assessed nine days after application for pesticide efficacy. Adult and immature thrips were counted in the field from 10 plants in each plot. The data were analyzed using ANOVA, followed by means separation using Fisher’s protected LSD (P < 0.05). Thrips counts following sampling on 7 Jul 2016 showed significant differences among the six treatments. Radiant was the most effective insecticide among all the treatments (Table 1). By comparison, Movento-, Exirel-, Lannate-, Agrimek-, and Minecto Pro-treated plots had significantly fewer thrips than the untreated check but were not as effective as Radiant. Warrior showed no significant difference from the untreated check (Table 1). Table 1 Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Means within columns not followed by the same letter are statistically significantly different from one another (Fisher’s protected LSD P < 0.05). Table 1 Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Treatment/formulation Rate-amt product/acre Mean thrips per plant 7 Jul 2016 Check 9.55 a Movento SC 5 fl oz 4.75 b Agrimek SC 3.5 fl oz 3.98 b Lannate SP 3 pt 3.02 b Radiant SC 10 fl oz 1.64 c Exirel SE 20.5 fl oz 3.44 b Minecto Pro SC 10 fl oz 4.33 b Warrior CS 1.92 fl oz 8.68 a Means within columns not followed by the same letter are statistically significantly different from one another (Fisher’s protected LSD P < 0.05). © The Authors 2017. 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 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 [email protected]

Journal

Arthropod Management TestsOxford University Press

Published: May 29, 2017

Keywords: Onion | Allium cepa; onion thrips | Thrips tabaci; Onion thrips, Thrips tabaci (Lindeman)

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