Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

INSECTICIDE EFFICACY TRIALS FOR SPIDER MITES ON RASPBERRY, 2002

INSECTICIDE EFFICACY TRIALS FOR SPIDER MITES ON RASPBERRY, 2002 (C16) RASPBERRY: Rubus idaeus, 'Heritage' Donn T. Johnson AGRI BLDG 311, Department of Entomology University of Arkansas Fayetteville, AR 72701 Tel: 479-575-2501 Fax: 479-575-2452 dtjohnso@uark.edu Barb A. Lewis Twospotted spider mite (TSSM): Tetranychus urticae (Koch) European red mite (ERM): Panonychus ulmi (Koch) Predatory mite (AF): Amblyseius fallacis (Garman) Efficacy data for additional acaricides were deemed necessary for raspberry. This test was applied on an existing commercial block of 'Heritage' raspberry in Judsonia, AR. On 26 Jun and on 11 Jul 2002, the foliage of three rows of raspberry plants was sprayed with Sevin Concentrate 22% (Garden Tech, LLC) at a rate of 12 oz formulation/4 gal using a Solo backpack diaphragm pump sprayer at 40 psi (one cone nozzle). This treatment caused an outbreak of Two spotted spider mite (TSSM) and European red mite (ERM) in Jul. Each treatment plot consisted of 5-ft-long section of raspberry plants in a randomized complete block design with four replicates. Plots were separated by a 1-ft buffer zone, free of plants. On 23 Jul, sprays were applied to foliage at rate of 100 gpa with a Solo backpack diaphragm pump sprayer at 40 psi (one cone nozzle). The foliar treatments were Agri-Mek 0.15 EC, Floramite 50WS, GWN 1725 1%, Pyramite 60% WS, Savey 50WP and a water check. Leaf samples of 20 medium-aged leaves/treatment plot were collected on 23, 30 July, and 6 Aug (0, 7, and 14 DAT). A brushing machine was used to brush mites from leaves onto a sticky glass plate. The plates were scanned under a stereomicroscope, mites were identified to species, counted and calculated the number mites per leaf. Agri-Mek, Floramite, GWN 1725, Pyramite and Savey all reduced both TSSM and ERM populations to <2 mites/leaf compared >3.4 mites/leaf in the untreated plots. Predatory mite (PM) populations ranged from 0 to 0.65/leaf at 0 DAT, but dropped to zero in all plots after treatment. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

INSECTICIDE EFFICACY TRIALS FOR SPIDER MITES ON RASPBERRY, 2002

Loading next page...
 
/lp/oxford-university-press/insecticide-efficacy-trials-for-spider-mites-on-raspberry-2002-KB8WlvpTpR
Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/28.1.C16
Publisher site
See Article on Publisher Site

Abstract

(C16) RASPBERRY: Rubus idaeus, 'Heritage' Donn T. Johnson AGRI BLDG 311, Department of Entomology University of Arkansas Fayetteville, AR 72701 Tel: 479-575-2501 Fax: 479-575-2452 dtjohnso@uark.edu Barb A. Lewis Twospotted spider mite (TSSM): Tetranychus urticae (Koch) European red mite (ERM): Panonychus ulmi (Koch) Predatory mite (AF): Amblyseius fallacis (Garman) Efficacy data for additional acaricides were deemed necessary for raspberry. This test was applied on an existing commercial block of 'Heritage' raspberry in Judsonia, AR. On 26 Jun and on 11 Jul 2002, the foliage of three rows of raspberry plants was sprayed with Sevin Concentrate 22% (Garden Tech, LLC) at a rate of 12 oz formulation/4 gal using a Solo backpack diaphragm pump sprayer at 40 psi (one cone nozzle). This treatment caused an outbreak of Two spotted spider mite (TSSM) and European red mite (ERM) in Jul. Each treatment plot consisted of 5-ft-long section of raspberry plants in a randomized complete block design with four replicates. Plots were separated by a 1-ft buffer zone, free of plants. On 23 Jul, sprays were applied to foliage at rate of 100 gpa with a Solo backpack diaphragm pump sprayer at 40 psi (one cone nozzle). The foliar treatments were Agri-Mek 0.15 EC, Floramite 50WS, GWN 1725 1%, Pyramite 60% WS, Savey 50WP and a water check. Leaf samples of 20 medium-aged leaves/treatment plot were collected on 23, 30 July, and 6 Aug (0, 7, and 14 DAT). A brushing machine was used to brush mites from leaves onto a sticky glass plate. The plates were scanned under a stereomicroscope, mites were identified to species, counted and calculated the number mites per leaf. Agri-Mek, Floramite, GWN 1725, Pyramite and Savey all reduced both TSSM and ERM populations to <2 mites/leaf compared >3.4 mites/leaf in the untreated plots. Predatory mite (PM) populations ranged from 0 to 0.65/leaf at 0 DAT, but dropped to zero in all plots after treatment.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2003

There are no references for this article.