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RUSSIAN WHEAT APHID CONTROL IN SPRING WHEAT, 2004

RUSSIAN WHEAT APHID CONTROL IN SPRING WHEAT, 2004 (F93) WHEAT: Triticum avenae L., ‘Alpowa’ David Bragg Washington State University Extension Entomology P.O. Box 190 Pomeroy WA 99347-0190 Cathlin Donohue Russian wheat aphid (RWA): Diuraphis noxia (Mordvilko) An experiment consisting of a RCB design of three treatments and untreated check replicated four times was seeded using a small plot drill on 7 Apr (60 lb per acre) at the USDA-ARS Western Regional Plant Materials Introduction Center at Central Ferry, WA. The crop emerged on 12 Apr and RWA appeared at just prior to anthesis. The foliar applications of Flonicamid 50SG (two rates) and Mustang Max were made 48 DAPE using a CO backpack sprayer at 20 gpa and 20 psi after a pre-count of mean percent RWA infested tillers. The post treatment counting of mean percent RWA infested tillers was conducted 15 DAT, and yield (bu/acre) data were collected by small plot combine on 22 Jul. Data were analyzed using ANOVA and means were separated using an F-protected LSD (P ≤ 0.05). All three treatments provided equal but significantly better control of RWA compared with the untreated check. Mustang Max and the higher rate of Flonicamid provided slightly better yields compared to the lower Flonicamid rate and the untreated check. Mean % RWA infested tillers Treatment/ Rate Yield formulation lb (AI)/acre 48 DAPE 15 DAT (bu/acre) Mustang Max 0.8EC 0.02 18.50a 0.13b 72.43a Flonicamid 50SG 0.089 18.75a 0.258b 75.38a Flonicamid 50SG 0.0623 18.75a 0.25b 67.33c Untreated check --- 19.25a 29.50a 63.10d Means in a column followed by same letter are not significantly different. (LSD; P > 0.05). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

RUSSIAN WHEAT APHID CONTROL IN SPRING WHEAT, 2004

Arthropod Management Tests , Volume 30 (1) – Jan 1, 2005

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/30.1.F93
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Abstract

(F93) WHEAT: Triticum avenae L., ‘Alpowa’ David Bragg Washington State University Extension Entomology P.O. Box 190 Pomeroy WA 99347-0190 Cathlin Donohue Russian wheat aphid (RWA): Diuraphis noxia (Mordvilko) An experiment consisting of a RCB design of three treatments and untreated check replicated four times was seeded using a small plot drill on 7 Apr (60 lb per acre) at the USDA-ARS Western Regional Plant Materials Introduction Center at Central Ferry, WA. The crop emerged on 12 Apr and RWA appeared at just prior to anthesis. The foliar applications of Flonicamid 50SG (two rates) and Mustang Max were made 48 DAPE using a CO backpack sprayer at 20 gpa and 20 psi after a pre-count of mean percent RWA infested tillers. The post treatment counting of mean percent RWA infested tillers was conducted 15 DAT, and yield (bu/acre) data were collected by small plot combine on 22 Jul. Data were analyzed using ANOVA and means were separated using an F-protected LSD (P ≤ 0.05). All three treatments provided equal but significantly better control of RWA compared with the untreated check. Mustang Max and the higher rate of Flonicamid provided slightly better yields compared to the lower Flonicamid rate and the untreated check. Mean % RWA infested tillers Treatment/ Rate Yield formulation lb (AI)/acre 48 DAPE 15 DAT (bu/acre) Mustang Max 0.8EC 0.02 18.50a 0.13b 72.43a Flonicamid 50SG 0.089 18.75a 0.258b 75.38a Flonicamid 50SG 0.0623 18.75a 0.25b 67.33c Untreated check --- 19.25a 29.50a 63.10d Means in a column followed by same letter are not significantly different. (LSD; P > 0.05).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2005

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