Lettuce Best Practice - Department of Primary Industries

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Farm Services Victoria 8Weed control – pest and beneficial habitatWeeds are a significant host of both pests and diseases in lettucecrops, some specific weeds are known hosts of viruses and the vectorsof those viruses.Weed control and control of pests such as aphids and thrips in weedson headlands may be a necessary management practice for viruscontrol.Weeds that are good hosts of viruses may also be good hosts for arange of pests which transmit the viruses. However, they may also bea good host for beneficials such as parasitoids and predators of thesepests.There can be a conflict in maintaining beneficial habitat and managingthe risk of disease presence and pest activity:• Monitor weeds and remove and control those which are criticalhosts of pests.• Encourage beneficial habitat in areas adjacent to production areasbut not within a crop.• Consider the use of native vegetation or the use of grass species inheadlands as alternative options for beneficial habitat. (For furtherinformation refer to the “Re-Vegetation by Design” project.)It is important to control weeds that are virus hosts as well as pesthosts and green manure crops have the potential to significantlysuppress weed growth.It is vital that a beneficial habitat is encouraged in order to support anIPM program.
The following tables indicate the key control methods, their IPM rating and management for the major insectpests, disease, nematode, virus and weed control issues.Each of the pest areas is colour coded.Insects Disease NematodeSnails and slugs Virus Weed controlLettuce Best Practice 9
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 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 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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