Beneficials class 5
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Beneficials class 5

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Insects presentation

Insects presentation

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Beneficials class 5 Beneficials class 5 Presentation Transcript

  • Beneficial Insects Commonly Found in the Garden and Landscape
  • If you build it…… . . . . They will come!!!
  • Attracting Beneficials
    • Complex vegetation structure can provide more niches for natural enemies.
    • Light, shelter, and other abiotic factors also play a role.
    • Flowers!
  • Complex Vegetation Structure Canopy Trees Understory Trees Groundcover Turf Shrub
  • Euonymus scale
    • Euonymus plants surrounded by flowering plants had less scale compared to those surrounded by bark mulch (Hanks and Sadof 2001).
    Flowers help attract beneficial insects
  • Flowers that Attract Beneficial Insects
    • Small flowers
      • Dill, Fennel, Basil
      • Yarrow, Sedum
      • Goldenrod, Joe Pye Weed
    • Daisy flowers
      • Purple Coneflower, Cosmos
    • Others
      • Salvias, Mints, Asclepias, Zinnia
  • Limit Pesticide Use!
    • Pesticides kill beneficials too!
    • Pests return quicker than beneficials
    • Insecticidal Soap, Horticultural Oil, and B.t. are less toxic to natural enemies
  • No. of plants infested with scale insects Landscapes under cover sprays for longer periods of time have higher levels of scale insect infestation.
  • Assassin Bugs Assassin bugs prey on aphids, caterpillars, beetles, leafhoppers,and other insects. They do not like to be handled.
  • Big-eyed Bugs These small insects with big eyes attack spider mites, thrips, aphids and other insect eggs .
  • Damsel Bugs Damsel bugs resemble assassin bugs. They feed on aphids, leafhoppers, mites and caterpillars.
  • Green Lacewings Green or brown, the lacewing, or aphid lion , is known to eat as many as 600 aphids. larva adult eggs
  • Ground Beetles These beetles are large, dark, and sometimes metallic. They feed along the ground on soft-bodied insects, especially at night. They are usually fast moving.
  • Lady Beetles Lady beetle adults and larvae attack aphids, mites, insect eggs and small insects. adult larva
  • Tiny Parasitic Wasps Micro- and mini-wasps can sting and lay eggs in caterpillars, aphids or insect eggs. The larvae consume their prey from within. Braconid wasp cocoons
  • Tachinid Flies Heavily bristled tachinid flies lay eggs on caterpillars, beetle larvae, and bugs. Parasitized monarch caterpillar and chrysalis
  • Predaceous Stink Bugs Many stink bugs are pests, but predaceous stink bugs feed on beetles and caterpillars both as adults and colorful nymphs .
  • Predatory Mites Predatory mites move rapidly to catch and feed on their plant-eating counterparts. They are often white, tan, or orange.
  • Soldier Beetles Adults resemble fireflies and are attracted to milkweed,hydrangea, and goldenrod. They eat aphids, caterpillars, mites, grasshopper eggs, and small beetles .
  • Syrphid Flies adult larva The harmless adults resemble bees, but the small larvae consume many aphids.
  • Minute Pirate Bug These bugs attack thrips, spider mites, aphids and small insects. larva
  • Wasps, Hornets, & Spiders Though often considered pests, these insects feed heavily on caterpillars, flies and other soft-bodied insects.
  • Praying Mantids Mantids have a good reputation, but eat relatively few insects in the garden.
  • Carolina Mantid Egg Case Chinese Mantid Egg Case
  • Chinese Praying Mantis Up to 5” long
  • Carolina Mantid Female Male Juvenile 2” long when mature
  • Are Mantids Beneficial?
  • Green Anoles
    • Native lizard – voracious insect eaters
  • Bug Eating Plants!
    • Pitcher Plants – Sarracenia species
    • Venus Fly Trap – Dionaea muscipula
    • Grow in very poor, wet soils
    • Get nitrogen from digesting bugs!
    • Not a practical form of insect control!
  • Next Week:
    • Tues, Sept. 1, 9:30
      • Extension Center, Burgaw
      • Plant Diseases and Diagnosing Plant Problems , chapters 7 & 19
    • Thurs, Sept. 3, 1:30
      • Poplar Grove Plantation
      • Integrated Pest Management and Pesticide Safety , chapter 9