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Thrips density in field without sunflower. Gray: <1-5 Green: 5-15 Blue: 15-30 Red: >30 ... Thrips density in field with sunflower. Gray: <1-5 Green: 5-15 Blue: ...

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    Slide 1: Control of Western Flower Thrips Through Integrated Pest Management in Tomato and Pepper Presented by: Dr. Charles Mellinger, Glades Crop Care, Inc. August 29, 2008

    Slide 2:1. Vector of Tomato Spotted Wilt Virus (TSWV) 2. Current infestation areas of thrips & TSWV 3. IPM Correct identification required for correct response Economic thresholds with and without TSWV Control measures Resistance management Preventative practices

    IPM of Western Flower Thrips my discussion points

    Slide 3:2. Current Situation - Thrips & TSWV

    TSWV reservoirs—inadequate knowledge Positive TSWV Identification in: Tampa area peppers & ornamentals Homestead tomatoes Emilia Georgia Transplants Summary – very little at this point compared to Southeastern U.S.

    TSWV Symptoms

    Slide 5:Emilia with TSWV Symptoms

    Slide 6:2. Current Situation - Thrips in South Florida

    Historically only Florida flower thrips Recently small pockets of Western flower thrips Homestead & adjacent areas with Thrips palmi Populations changing and moving New large populations of WFT-east coast Significant population of other important thrips Summary – thrips are becoming very important in South Florida crops 2006 - Present 1985 - 2005

    F. tritici F. occidentalis F. fusca F. bispinosa Thrips palmi

    Slide 8:3. IPM

    Correct identification of thrips’ genus/species required for correct response Economic thresholds are different Chemical control choices are different No pyrethroids Rotation and resistance management are different

    Slide 9:Insecticide Treatment for WFT Larvae Control in Spring Tomatoes

    Dr. Tom Kuhar – VA Eastern Shore

    Slide 10:WFT Adults & Minute Pirate Bugs (MPB) Collected from Pepper Blooms Ft. Pierce, FL, Spring 2007

    Slide 11:3. IPM-Preventive Practices

    Monitoring Pre-planting: weeds and surrounding fallow During crop production During crop and post crop destruct - Impact on adjacent crops and fields Varietal resistance—few varieties in pepper to TSWV Reflective mulch---reduced #’s and incidence Adjacent grower notifications Conservation of the Thrips predator—The Minute Pirate Bug—Orius insidiosus

    Minute Pirate Bug (MPB) Orius insidiosus Larva Adult Sunflowers in pepper for thrips control: more Orius, fewer thrips Orius density in field without sunflower Gray: <0.01-0.05 Green: 0.05-0.1 Blue: 0.1-0.5 Red: >0.5 Orius per pepper flower Orius density in field with sunflower Gray: 0.01-0.05 Green: 0.05-0.1 Blue: 0.1-0.5 Red: >0.5 Orius per pepper flower Thrips density in field without sunflower Gray: <1-5 Green: 5-15 Blue: 15-30 Red: >30 Thrips per flower Thrips density in field with sunflower Gray: <1-5 Green: 5-15 Blue: 15-30 Red: >30 Thrips per flower

    Slide 20:Summary

    WFT expanding in South Florida WFT excellent vector of TSWV Augment pepper crop with sunflower Few WFT Pesticide controls Must ID thrips population for correct response Must scout for correct response

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