Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Bees and their importance in the garden


Published on

Bees and their importance in the garden

  1. 1. Pollinators! Andtheir importancein the gardenBart RennerNorth Carolina CooperativeExtension ServiceApril 3, 2013
  2. 2. The Honeybee• Brought over from Europeabout 400 years ago• Most popular, easiest towork with.• Major pollinator! “busy asa bee”Image:
  3. 3. Bumble Bees• More than 40species in NorthAmerica• Generalists• Nestunderground, rodent burrow, flowerpots, etc…• sonicate, or “buzzpollinate”= bettertomatoes!
  4. 4. Carpenter bees• 500 species worldwide• “semi-solitary”• Usually seeing the easterncarpenter bee here in NC• Males cannot sting, femalescan but generally don’t.• Prefer open faced flowersImage: J.K. Barnes. University of Arkansas.
  5. 5. Carpenter bees
  6. 6. Andrenid (mining) bees• Over 2000 species• Solitary, females digburrows in ground• Lay egg on large ballof pollen at the endof tunnel
  7. 7. Andrenid (mining) beesImage:
  8. 8. Anthophorini- “digger bees”
  9. 9. Digger beesImages: Copyright © 2009 Jim MooreAnd
  10. 10. Squash bees• Few know species (about 20)• Oligoleges: Focus almost entirelyon cucurbits• Generally active 1 hour beforehoneybeesImage:
  11. 11. Squash BeesImages:
  12. 12. Leaf Cutter bee
  13. 13. Leaf cutterbees
  14. 14. Leaf cutter bees
  15. 15. Leaf cutter bees (nests)Images:
  16. 16. Mason Bees• 300 species worldwide, 140 in NorthAmerica• Make compartments ofmud in their hollow nests• Great springpollinators, very efficientfruit tree pollinators• Handle cold well.Images:
  17. 17. Mason bees- Pollinator of the month!• Blue Orchard Mason Bee- (Osmia lignaria)Image:
  18. 18. Mason Bees
  19. 19. Sweat bees• More than 2000known species• Nest in ground• Some arevespertine, orcrepuscular.• Attracted to salt inhuman sweat/tears
  20. 20. Sweat bees
  21. 21. Plasterer bee• Over 2000 knownspecies• Solitary, but nest inaggregations.• Line inside of nestwith secretions frommouth• Dries intocellophane-likelining.Image:
  22. 22. PlastererbeesImage: © Copyright John Ascher, 2006-2010Colletes daviesanus, plasterer bee
  23. 23. Birds, bats, ants, moths, beetles, etc.,
  24. 24. The Honey Bee- interesting facts• 1 hive may have 60,000 individuals• Honey bees have foraging adults throughout theflowering season• Some vegetables require 12 visits/ flower to setfruit.• Honey bees can fly at speeds of up to 15 miles perhour.• A single honeybee worker produces about 1/12thteaspoon honey in her lifetime
  25. 25. The Honey Bee- interesting facts• The hive must produce 40-60lbs of honey to livethrough the winter• A queen honeybee stores a lifetime’s worth ofsperm• A queen bee can lay 1,500-2,000 eggs in a day,and a million in her life• Honeybees have an amazing communicationsystem
  26. 26. Economic Impact of bees• Bee-dependent crops account for $47.1 billionevery year, of which $14.6 billion is attributable tohoney bee pollination• In NC bees are responsible for $185 million inadded fresh produce a year.• Over 100 crops in North America require a visitfrom a pollinator• Affect 1/3 of agricultural production• NC honey producers make $6 million a year
  27. 27. Fruits andveggies thatneed beesImage:
  28. 28. Tips to encourage bees in yourgarden• Plant a garden instead of a mowing a lawn!• Replace parts of lawn with native flowers• Try using non-hybridized flowers• Plan for blossoms year round (click here)• Set up native bee homes• Give them some water!
  29. 29. Common Garden Pesticides that mayharm honeybees• Orthene (Acephate)• Seven (Carbaryl)• Diazinon (Spectracide, others)• Bayer systemic (Imidacloprid), which gets into the pollen, maycause disorientation and death in bees• Ambush, Pounce (Permethrin)• Crossfire, Raid Flying Insect Killer (Resmethrin)• Read more:
  30. 30. Safe only if sprayed at dawn ordusk, when bees aren’t active• Spinosad (insecticide)• Pyrethrum (insecticide)• Neem oil (fungicide, insecticide)
  31. 31. Honeybee-safe pesticides• Sulfur (fungicide)• Serenade (biological fungicide)• Insecticidal soap• Petroleum-based oils• B.T. (Bacillus thuringiensis) -biological control forcaterpillars• Herbicides like Roundup and 2,4-D
  32. 32. Threats• Varroa Mites
  33. 33. Threats- disease
  34. 34. Threats- loss of habitat
  35. 35. What’s blooming now here in WNC?
  36. 36. Bloom Schedule
  37. 37. Questions?