control of codling moth by postharvest application of ethephon 2sl and insecticide

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Control of codling moth by postharvest application of Ethephon 2SL and insecticide. Chuck Ingels , UCCE Sacramento County Bob Van Steenwyk , UC Berkeley Rachel Elkins , UCCE Lake/Mendocino Counties Lucia Varela , UCCE North Coast Funding : UC IPM Program, PPMRF. - PowerPoint PPT Presentation

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  • Control of codling moth by postharvest application of Ethephon 2SL and insecticideChuck Ingels, UCCE Sacramento CountyBob Van Steenwyk, UC BerkeleyRachel Elkins, UCCE Lake/Mendocino CountiesLucia Varela, UCCE North Coast

    Funding:UC IPM Program, PPMRF

  • Previous Research(R. Van Steenwyk et al.)Bartlett harvest July thru mid Aug.Substantial fruit remains in trees after harvestCM larvae that complete development:End of July: enter pupal stage adultsEnd of August: enter overwintering stagePostharvest fruit removal reduced over-wintering CM 75%Larvae that infest ripe pears do not complete development (6.5 kg/cm2)

  • Applications of Ethephon 2SLSacramento and North Coast10-20 acres each:(2007) 4 pt. Ethephon + 2 pt. Lorsban 4E (2008) Replaced Lorsban other insecticidesUntreated

  • MeasurementsMeasured fruit firmness weekly after spray25 normal fruit and 10 rat tail fruitMonitored trap counts in spring (1st gen.)5 bait pan traps, 1 in center of block1 pheromone trap (10X), in centerMeasured yield and fruit size

  • Fruit Pressures 2007Sacramento, 2 wks. after Aug. 4-9 sprayabaa

    Chart1

    11.15.6

    3018.2

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal11.15.6

    Rattail3018.2

    To resize chart data range, drag lower right corner of range.

  • Fruit Pressures 2007 Mendocino, 2 wks. after Aug. 14 spray

    Chart1

    10.22

    13.911.5

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal10.22

    Rattail13.911.5

    To resize chart data range, drag lower right corner of range.

  • Fruit Pressures 2007 Mendocino, 3 wks. after Aug. 14 spray

    Chart1

    9.82.9

    22.25.9

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal9.82.9

    Rattail22.25.9

    To resize chart data range, drag lower right corner of range.

  • Fruit Pressures 2008Sacramento, 1 wk. after Aug. 12-15 sprayaaaa

    Chart1

    11.18.1

    16.613.7

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal11.18.1

    Rattail16.613.7

    To resize chart data range, drag lower right corner of range.

  • Fruit Pressures 2008Sacramento, 2 wks. after Aug. 12-15 sprayabab

    Chart1

    8.83.5

    16.910.2

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal8.83.5

    Rattail16.910.2

    To resize chart data range, drag lower right corner of range.

  • Fruit Pressures 2008Sacramento, 3 wk. after Aug. 12-15 sprayabab

    Chart1

    6.34.2

    15.12.2

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal6.34.2

    Rattail15.12.2

    To resize chart data range, drag lower right corner of range.

  • Fruit Pressures 2008Lake/Mendo, 1-2 wks. after 8/22 - 9/5 sprayaaaa

    Chart1

    10.68.7

    17.515.1

    Untreated

    Ethephon

    Pressure (kg/cm2)

    Sheet1

    UntreatedEthephon

    Normal10.68.7

    Rattail17.515.1

    To resize chart data range, drag lower right corner of range.

  • Bait Pan TrappingXXXXXXXXXX

  • Trap Catches 1st Generation (Sacto.)% Reduction with Ethephon55%25%38%

    Chart1

    11251

    254191

    4528

    Untreated

    Ethephon

    Total # Moths

    Sheet1

    UntreatedEthephonSeries 3

    10X Pher.112512

    Bait Pan Total2541912

    Bait Pan Center45283

    Category 44.52.85

    To resize chart data range, drag lower right corner of range.

  • Trap Catches 1st Generation (Mendo.)% Reduction with Ethephon

    Chart1

    132

    2445

    63

    Untreated

    Ethephon

    Number of Moths

    Sheet1

    UntreatedEthephonSeries 3

    10X Pher.1322

    Bait Pan Total24452

    Bait Pan Center633

    Category 44.52.85

    To resize chart data range, drag lower right corner of range.

  • ConclusionsTypical decline of fruit pressure to 6.5 kg/cm2 after treatment:Normal fruit: 1-2 weeksRattail fruit: 2-3 weeksYield (avg. # trees to fill one bin)No differencesFruit size (weight of 400 fruit/block)No differences

    ***************

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