3 19 Biological Pest Controls Remake
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3 19 Biological Pest Controls Remake

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3 19 Biological Pest Controls Remake 3 19 Biological Pest Controls Remake Presentation Transcript

  • Biological Pest Controls Plant: Periwinkle Term: Biological Controls
  • Periwinkle Vinca minor
    • Perennial, evergreen, groundcover
    • USDA Hardiness Zones: 4a to 9a
    • Height: 6" to 12" , spread 12-14”
    • Exposure: shade to full sun
    • Bloom Color: Blue, Lavender, Purple, White
    • Leaf Color: Green
    • Growth Rate: fast
    • Can become invasive
    • Landscape Uses: Erosion control, Ground cover
  • Biological Control
    • A method of controlling pests that relies on living organisms
    • Can be a
      • Predator
      • Competitor
      • Parasite
      • Pathogen – causes disease
    • The arthropod predators of insects and mites include beetles, lacewings, midges, spiders, wasps, and predatory mites.
    • Insect predators can be found throughout plants, including the parts below ground, as well as in nearby shrubs and trees.
    • Some predators are specialized others are generalists.
    • Some are extremely useful natural enemies of insect pests. Unfortunately, some prey on other beneficial insects as well as pests.
    • Major characteristics of arthropod predators:
      • adults and immatures are often generalists rather than specialists
      • they generally are larger than their prey
      • they kill or consume many prey
      • males, females, immatures, and adults may be predatory
      • they attack immature and adult prey
    Predators
  • Bt, or Bacillus thuringiensis
    • A biological control - pathogen
    • Bt is a natural bacteria found at low levels in soils.
    • Effective organic pesticide
    • It works by secreting one or more toxins after being ingested by an insect.
    • Only works if it is eaten – not on contact
    • Beginning to have problems due to overuse
  • Parasitoid
    • Insect parasitoids have an immature life stage that develops on or within a single insect host, ultimately killing the host.
    • Major characteristics of insect parasitoids:
      • they are specialized in their choice of host
      • they are smaller than host
      • only the female searches for host
      • different parasitoid species can attack different life stages of host
      • eggs or larvae are usually laid in, on, or near host
      • immatures remain on or in host; adults are free-living, mobile, and may be predaceous
      • Immatures almost always kill host
  • Growing Environment
    • Use companion planting to repel insects
    • Provide habitat for predators
    • Use polyculture over monoculture
    • Optimal soil health
    • Optimal humidity levels
    • Healthy plants more resistant
  • Biorational Pesticides
    • Pest control materials that are relatively non-toxic to people with few environmental side-effects
      • All pesticides have some toxicity
    • Insecticidal soap
    • Botanicals are plant-derived materials
      • pyrethrin,
      • Azadiractin
      • neem oil
      • garlic
      • capsaicin
      • vegetable oil
    • Botanicals are generally short-lived in the environment, as they are broken down rapidly in the presence of light and air.
    } plant extracts