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Biological Control Strategies

Biological Control Strategies

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Biological Control Strategies

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  1. Biological Control Strategies

  2. Bio-control Strategies • Classical Biological Control • Augmentation - Inundation - Inoculation • Conservation Biological Control

  3. Classical Biological Control Definition The intentional introduction of an exotic biological control agent for permanent establishment and long-term pest control (Eisenberg et al. 2001)

  4. The enemy release hypothesis

  5. Introducing a Natural Enemy • Identify center of origin • Foreign exploration • Quarantine and mass production • Release and establishment • Post-establishment evaluation

  6. Case Study:Vedalia versus cottony cushion scale

  7. California 1880 California 1868 The Cotton Cushion Scale

  8. Foreign Exploration Albert Koebele Traveled to Australia in 1888

  9. Natural Enemies Found and Shipped! Rodolia cardinalis

  10. Natural Enemy Released

  11. Problem Solved! 1890: Cotton Cushion scale no more

  12. Other Imported Natural Enemy of the Cotton Cushion Scale

  13. Californians Were Thankful

  14. Case Study:Controlling the Cassava Mealybug

  15. Classical Biological control

  16. Successful classical biological control cases

  17. Successful classical biological control cases

  18. New Associations

  19. The percentage of control is low

  20. Some Terminology • Establishment • Complete control • Substantial control • Partial control

  21. To Improve Classical Bio-Control Success: • Climate matching • Stable habitats • Simple food webs • Pest and natural enemy are specialists • Pest feed unconcealed • Pests are gregarious • Numerous releases (different species)

  22. Consider that: • Bio-control take sometime to kick • The cost-benefit ratio when established is always high