Lettuce Best Practice - Department of Primary Industries

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Farm Services Victoria 24Effective IPM Rating √ √ √ √ √WhitefliesSilverleaf whitefly (SLW) Bemisia tabaci (Biotype b), Glasshouse whiteflyTrialeurodes vaporariorumCritical Comments: No chemicals registered for control in lettuce but some used for othersucking insects will provide control. Pest does not breed on Lettuce. The two Whitefly species lookvery similar.Infestation Risk Factors Cultural Practices Chemical Control Conflicts /IssuesIncreases theriskHot conditions.Nearby Whiteflyhost crops orweeds.Poor hygienein protectedcroppingstructures.Reduces theriskScreen nurseryif necessary.Double doorson protectedcroppingstructures.Keep crop areaweed free.Effectivemonitoring.MonitoringControlThresholdsMonitor forpresence /damage. Yellowsticky trapscan be usedto monitor forWhitefly.2-4 flies perleaf present on40% of plants.Correctlyidentify theWhitefly todetermineits potentialimpact.BeneficialInsectsWaspparasitoidsattack SLWnymphs.GeneralistPredators.Considerprovidinghabitat forbeneficials.Other Pest Lifecycle Chemical IPM IssuesEnsure goodspray coverage.Select aproductionperiod that willminimise pestpressure.Harvestingof nearbysusceptiblecrops maycause Whiteflyto migrate toyour crop.Spray oils andeven wettersknock-downadults.Whitefly doesnot breed onlettuce.Adult Whitefliesdamage lettucecrops.There arelimitedchemicalsavailable forcontrol.Year-roundproduction andpoor productrotationincreasesthe risk ofinsecticideresistance.Crops that hostSLW and aresprayed withbroad spectruminsecticideswill see a largepopulationincrease.Some chemicalcontrols forother suckinginsects onlettuce willprovide control.
Infestation Risk Factors Cultural Practices Chemical Control Conflicts /IssuesIncreases the Reduces the Monitoring Beneficial Other Pest Lifecycle Chemical IPM IssuesriskriskControlThresholdsInsectsGenerallyan issue toseedlings andtransplants.Lettuce Best Practice 25
Page 1 and 2: Lettuce Best PracticeIntegrated Pes
Page 5: What is IPM (Integrated Pest Manage
Page 8 and 9: Farm Services Victoria 4The number
Page 10 and 11: Farm Services Victoria 6Generic IPM
Page 12 and 13: Farm Services Victoria 8Weed contro
Page 14 and 15: Farm Services Victoria 10Effective
Page 16 and 17: Farm Services Victoria 12Currant le
Page 18 and 19: Farm Services Victoria 14CutwormAgr
Page 20 and 21: Farm Services Victoria 16Critical C
Page 22 and 23: Farm Services Victoria 18Loopers an
Page 24 and 25: Farm Services Victoria 20Effective
Page 26 and 27: Farm Services Victoria 22Critical C
Page 30: Farm Services Victoria 26Wireworm /
Page 33 and 34: ResistantvarietiesavailableRotation
Page 42 and 43: Farm Services Victoria 38Septoria s
Page 44: Farm Services Victoria 40NematodesM
Page 47 and 48: Infestation Risk Factors Cultural P
Page 49 and 50: Host plantscontinuedKey controlinfo
Page 51 and 52: Transplant through tovegetative gro
Page 53 and 54: Method of control for aweed free se
Page 55 and 56: Broadleaf weedsThe most significant
Page 57 and 58: Rotation Crop Cultural Practices Co
Page 59 and 60: Identification of Insects, Spiders
Page 61 and 62: Scouting Protocol for Lettuce incor

Lettuce Best Practice - Department of Primary Industries

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