Dwight K. Jesseman St. Johns County Agricultural Agent.
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Transcript of Dwight K. Jesseman St. Johns County Agricultural Agent.
![Page 1: Dwight K. Jesseman St. Johns County Agricultural Agent.](https://reader036.fdocuments.us/reader036/viewer/2022062518/56649e185503460f94b04b23/html5/thumbnails/1.jpg)
Dwight K. JessemanDwight K. Jesseman
St. Johns CountySt. Johns County
Agricultural AgentAgricultural Agent
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NematologyNematology
Basic Principles Basic Principles for Master for Master GardenersGardeners
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Types of NematodesTypes of Nematodes
Plant ParasiticPlant Parasitic PredatoryPredatory EntomophagousEntomophagous Free LivingFree Living MarineMarine
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Plant ParasiticPlant Parasitic
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PredatoryPredatory
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EntomophagousEntomophagous
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Free LivingFree Living
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MarineMarine
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Morphology and AnatomyMorphology and Anatomy
AnimalsAnimals Round WormsRound Worms Size 0.25mm to 3.0mmSize 0.25mm to 3.0mm Layered CuticleLayered Cuticle Vermiform, Globose, Kidney Vermiform, Globose, Kidney
ShapedShaped
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Layered CuticleLayered Cuticle
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VermiformVermiform
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GloboseGlobose
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Kidney ShapedKidney Shaped
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Life Cycle and Life Cycle and ReproductionReproduction Egg - 50 to 500Egg - 50 to 500 Four Juvenile StagesFour Juvenile Stages AdultAdult Male and Female in Most SpeciesMale and Female in Most Species Life Cycle Dependant on Soil Life Cycle Dependant on Soil
TemperaturesTemperatures Move SlowlyMove Slowly
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Egg and JuvenileEgg and Juvenile
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FeedingFeeding
Oral Stylet or SpearOral Stylet or Spear Inject EnzymesInject Enzymes Digest Cell ContentsDigest Cell Contents
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Oral Stylet Oral Stylet
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Host- Parasite RelationshipHost- Parasite Relationship
Migratory EctoparasiticMigratory Ectoparasitic– Ring, SpiralRing, Spiral
Migratory EndoparasiticMigratory Endoparasitic– Lesion, BurrowingLesion, Burrowing
Sedentary EndoparasiticSedentary Endoparasitic– Root-Knot, Cyst, Reniform, CitrusRoot-Knot, Cyst, Reniform, Citrus
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Migratory EctoparasiticMigratory Ectoparasitic
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Migratory EndoparasiticMigratory Endoparasitic
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Sedentary EndoparasiticSedentary Endoparasitic
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DiagnosesDiagnoses
Very Difficult at TimesVery Difficult at Times Poor GrowthPoor Growth Combination of ProblemsCombination of Problems Assay of Soil and/or Plant TissueAssay of Soil and/or Plant Tissue SymptomsSymptoms
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Above-GroundAbove-Ground
Rarely SufficientRarely Sufficient ChlorosisChlorosis DiebackDieback Melting outMelting out Reduced GrowthReduced Growth Water StressedWater Stressed
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Reduced GrowthReduced Growth
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Below-GroundBelow-Ground
Root GallsRoot Galls Root SwellingsRoot Swellings Abbreviated Root SystemAbbreviated Root System Root RotRoot Rot Cyst NematodesCyst Nematodes
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Root GallsRoot Galls
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Abbreviated Root SystemAbbreviated Root System
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Cyst NematodesCyst Nematodes
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Field HistoryField History
Gradual DeclineGradual Decline Area - Small to LargeArea - Small to Large Rotation of CropsRotation of Crops
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Laboratory AssayLaboratory Assay
Soil and Plant TissueSoil and Plant Tissue Relative Population DensitiesRelative Population Densities Economic ThresholdsEconomic Thresholds
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Nematode ManagementNematode Management
Prevention Prevention Crop RotationCrop Rotation Crop Root DestructionCrop Root Destruction Flooding and FallowingFlooding and Fallowing ResistanceResistance Biological ControlBiological Control NematicidesNematicides
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Home GardenHome Garden
Container GrowingContainer Growing Site SelectionSite Selection Crop RotationCrop Rotation Soil Tillage and Root DestructionSoil Tillage and Root Destruction AmendmentsAmendments
– Organic MatterOrganic Matter– Green ManuresGreen Manures
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Home GardenHome Garden
Planting TimePlanting Time Nematode - Free TransplantsNematode - Free Transplants Resistant VarietiesResistant Varieties Soil SolarizationSoil Solarization Chemical ControlChemical Control
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Soil SolarizationSoil Solarization
Cover for at least 4 weeksCover for at least 4 weeks Well TilledWell Tilled High MoistureHigh Moisture Slightly Raised Beds Slightly Raised Beds Crown the BedCrown the Bed
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Soil SolarizationSoil Solarization
Clear PolyethyleneClear Polyethylene Thin Plastic 1 to 2 milThin Plastic 1 to 2 mil Leave in Place Until PlantingLeave in Place Until Planting Avoid Contaminated Plants or SoilAvoid Contaminated Plants or Soil
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Soil TemperaturesSoil Temperatures
Tarped Soils 111 to 122Tarped Soils 111 to 122 115 - Water Molds115 - Water Molds 120 - Nematodes120 - Nematodes 140 - Most Fungi140 - Most Fungi 150 - Most Soil Insects150 - Most Soil Insects 160 - Most Viruses and Bacteria160 - Most Viruses and Bacteria 170 - Most Weed Seeds170 - Most Weed Seeds
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OrnamentalsOrnamentals
Site PreparationSite Preparation Treat SoilTreat Soil
– FumigationFumigation– Soil SolarazitionSoil Solarazition
Replace Infested SoilReplace Infested Soil Root BarriersRoot Barriers
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OrnamentalsOrnamentals
Nematode-Free StockNematode-Free Stock Well Adapted PlantsWell Adapted Plants Resistant PlantsResistant Plants MaintenanceMaintenance MulchesMulches Other PestsOther Pests Chemical ControlChemical Control
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TurfTurf
Biological ControlsBiological Controls Resistant PlantsResistant Plants Chemical ControlChemical Control
– Fumigation Before PlantingFumigation Before Planting
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ResistanceResistance
Bahiagrasses - Tolerant of MostBahiagrasses - Tolerant of Most Centipedegrasses - Ring, Sting, Centipedegrasses - Ring, Sting,
SheathSheath St. Augustinegrasses -Sting, LanceSt. Augustinegrasses -Sting, Lance Bermudagrasses - Sting, Lance, Bermudagrasses - Sting, Lance,
StubbyStubby Zoysiagrasses - Most nematodesZoysiagrasses - Most nematodes
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Basimid Granular UseBasimid Granular Use
Compost PilesCompost Piles Potting SoilsPotting Soils Seed and Propagation BedsSeed and Propagation Beds Soil MediaSoil Media Establishing Turf and Ornamental Establishing Turf and Ornamental
SitesSites Not for Use in Vegetable GardensNot for Use in Vegetable Gardens READ THE LABEL, IT IS THE LAWREAD THE LABEL, IT IS THE LAW
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QuestionsQuestions