Natural pest control in the garden


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Natural pest control in the garden

  1. 1. Natural PestControl in theGardenApril 1, 2013Bart RennerNorth Carolina Cooperative Extension Service
  2. 2. Backyard Unicorn production
  3. 3. Components of a unicorn April Fools!!!
  4. 4. What does natural Pest ControlMean???• Generally considered the management of garden pests without the use of conventionally manufactured chemicals, hormones and antibiotics.• Not necessarily “Organic”• Does not mean you can drink it• Make sure you still use “PPE” (personal protective equipment)!!
  5. 5. Biological Pest control • Using other living organisms to controls pests
  6. 6. Integrated pest management
  7. 7. “Many Little Hammers” approach Soil fertility Biological control pesticides intercropping tillage Cultural control
  8. 8. Copper sulfate• Naturally occurring salt• Used to control mildew, leaf spots, blights and apple scab• Can also control grape diseases (Bordeaux mixture)• Also an effective algacide
  9. 9. Serenade- fungicide• patented strain of Bacillus subtilis• Kills microbes on contact• Controls Fire Blight, Botrytis, Sour Rot, Rust, Sclerotinia, Powd ery Mildew, Bacterial Spot and White Mold.
  10. 10. Insecticide/ fungicide: NEEM Oil • Azadirachtin and liminoids, both from the seed kernels of the neem tree fruit. • Disrupts the insects hormonal system, causing them to not reach maturity • Generally will not harm beneficials • Washes off in the rain, breaks down in sunlight
  11. 11. Methods for controlling fungus:1. Avoid contaminated material2. Plant resistant varieties3. Fungicides4. Scouting and monitoring
  12. 12. Early blight • Fungus that affects tomatoes and potatoes
  13. 13. Early Blight on tomato
  14. 14. Early blighton potato ges/potatoeb.gif
  15. 15. Late blight
  16. 16. Fusarium Wilt • Affects tomato, tobacco, le gumes, cucurbits, sweet potatoes and banana, to name a few.
  17. 17. Verticillium wilt• Similar to Fusarium• Affects basil, beans, strawber ries, peas, and watermelon
  18. 18. Verticillium wilt
  19. 19. Downy mildew
  20. 20. Downey Mildew
  21. 21. Powderymildew
  22. 22. Insecticidal soaps• Sodium or potassium salt combined with fatty acids• Penetrate insect’s cells and cause them to collapse• Must come into direct contact with pest, no longer effective when dry
  23. 23. Insecticide: Pyrethrins• Natural organic compounds normally derived from Chrysanthemum cinerariifolium• neurotoxins that attack the nervous systems of all insects• Break down with light and air exposure• Careful of the bees!
  24. 24. Insecticide: Bt (Bacillus thuringiensis) • Generally a powder that is sprinkled on plant, must be eaten by insect • Bt releases toxins in the stomachs of susceptible insects and makes them stop eating • Very host specific, will not harm humans or pets (can be irritant on skin).
  25. 25. Insecticide: Horticultural oil• Highly refined petroleum oil- coats and suffocates insects• Adelgids, aphids, caterpillar eggs, leafhoppers, mealybug, mites, scale, spider mites, thrips and whiteflies
  26. 26. Insecticide: Diatomaceous Earth•Absorbs lipids from the waxyouter layer ofinsects exoskeletons, causingthem to dehydrate.•Effective against a widevariety of insects when appliedproperly•Not effective when wet
  27. 27. Insecticide: Milky spore• Bacteria (Paenibacillus popilliae), which dwell in soil.• Cause the “milky spore disease” in Japanese beetle larvae• Very specific to larvae• Cold and drought tolerant
  28. 28. Flea beetles
  29. 29. Thrips
  30. 30. Cucumber beetles
  31. 31. Pests: Cabbage worm• Click here for more infoImages:1.
  32. 32. Pests: Cabbage maggot • Click here for More infoImages:
  33. 33. Pests: Aphids • More infoImage:
  34. 34. Colorado Potato beetles Images: -potato-beetle-larvae.jpg
  35. 35. Japanese beetles
  36. 36. Release of biological agents to control pests. • Can be complicated and needs to be done under survellance • Click here to view common biological controls in North CarolinaPhoto: Fire ants trying to avoidthe sting of a phorid fly. Photo courtesy of Bugwood Network
  37. 37. Pesticide Safety• 3 modes of exposure:• Dermal, inhalatio n, ingestion
  38. 38. Further resources• NCSU plant disease clinic