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IPM of Insect Pests and Disease

Adapted from original presentation by D. P. Muehleisen, Evergreen State College. IPM of Insect Pests and Disease. What is IPM?. There are many different definitions Key concepts: Pests and management

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IPM of Insect Pests and Disease

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  1. Adapted from original presentation by D. P. Muehleisen, Evergreen State College IPM of Insect Pests and Disease

  2. What is IPM? • There are many different definitions • Key concepts: Pests and management • Integrated pest management is a sustainable approach to controlling insect pest populations that combines (PAMS) • prevention, • avoidance, • monitoring • suppression • strategies in a way that minimizes economic, health, and environmental risks.

  3. History of IPM • Early years, pesticide based – some feel it was more “Integrated Pesticide Management” • Now moving towards ecosystem based • Key concept: integrate numerous of compatible control strategies to maximize population stabilization

  4. Prevention • Various practices that keep pests from infesting a production site (i.e. field, orchard, or greenhouse) • Examples • Using pest free seed or transplants • Field sanitation • Eliminating alternative hosts

  5. Avoidance • When pests are already present in the general area, but pest impact can be minimized through various cultural practices. • Crop rotation • Crop choices • Trap crops • Adjusting planting schedule • Early planting, late planting, not planting • Resistance traits • Fast maturing varieties

  6. Monitoring • The key component to any IPM program • Proper identification of pest – know your enemy • Monitoring program • Traps • Weather monitoring • Soil testing, when appropriate • Record keeping • Pest incidence and distribution in each field

  7. Cultural practices No-till or strip till Cover crops or mulches Companion planting Allelopathic properties Physical suppression Baited or pheromone traps Exclusion devices Row covers Biological Control Mating disruption Pheromone Sterile release Conservation Augmentation Chemical/biopesticide control Considered a last resort Evaluate Cost to benefit ratio SuppressionTo avoid economic loss, population suppression technique may be necessary

  8. Problems with pesticides: The pesticide treadmill • Resistance • Resurgence • Secondary pests • Residues

  9. What does Resurgence and Resistance look like?

  10. The Basic Elements of an IPM Program Know crop growth cycle Know the pest Combine methods Attack the weak link Monitor Preserve beneficials Gain threshold= management cost ($/ac)/market value ( $/bu)

  11. Ecosystem management Cultural control Information resources Monitoring program Record keeping Know your options Planning an on Farm IPM Program

  12. Ecosystem management effects on carrying capacity • Carrying capacity impacts Economic Threshold and Economic Injury Level • Farmscaping - Managing habitat for beneficial populations require • shelter • food • water

  13. Plants to Attract and Feed Beneficial Insects • Umbelliferae family • carrot, yarrow, Queen Anne’s lace, dill, anise, fennel, coriander, parsley • Compositae family • zinnia, marigold, aster, daisies, mums, black-eyed susan, coneflower, Coreopsis • Mint family and Perennial herbs • mints, thyme, sage, oregano, bee balm, basil • Other plants • salvias, wallflowers, nasturtiums, poppies, etc. goldenrod wild carrot dill

  14. Cultural Control • Varieties/Cropping System • Developmental rate • Planting dates/harvesting dates • Crop rotation

  15. Cultivar selection is critical Control achieved through various planting methods – multiple, interplanting, intercropping Multiple cropping Sequential production Interplanting Cover crop Intercropping Two or more crops on the same land at the same time Strip cropping Plant varieties /Cropping systems

  16. Cover Crops

  17. Cover Crops Click on image to start video

  18. Biological Controls • Conservation of naturally occurring methods of population stabilization • Predators • Parasitoids • Augmentation of organisms that will help to stabilize population of pests • Predators • Parasitoids

  19. Predators Lady bird beetles Adults Larva

  20. Predators Green Lacewing Adults Larva

  21. PredatorsSyrphid fly • Adults Larva

  22. PredatorsOrius insidious

  23. Peristenus digoneutis Encarsia inaron Parasitoids

  24. Augmentation: Predator/Parasite release

  25. Row covers Hand picking Sticky boards Plant collars Mechanical/Physical controls

  26. Insecticides • Chemical pesticides • Biochemicals • pyrethrins • rotenone • azadirachtin • Bt (Bacillus thuringiensis) • Synthetic pesticides with properties of natural substance • Permethrin (Pounce) • Biopesticides • Bacteria • Fungi • Viruses

  27. Scouting fields Hand lens Random samples Trapping Pheromone traps Light traps Pit fall traps Sticky traps Sweep Net Vacuuming Beat sheets Monitoring of pest populations Random Samples: a measure of the total population

  28. Field Scouting • Point Sample • Random samples

  29. Sweep net sample

  30. Trapping Visual trap Lure trap Pheromone trap Pheromone trap Visual trap

  31. Beat sheet

  32. Disease Control

  33. ID your problem • Contact County Extension Educator • Contact Plant, Soil and Entomological Sciences Dept. at University of Idaho Check out the Idaho Plant Disease Reporter http://www.uidaho.edu/ag/plantdisease/

  34. How does a disease spread?

  35. Disease Distribution and its Impact Occurrence over time Disease distribution Apple powdery mildew

  36. Resistant varieties Disease free seed Crop rotation Sanitation Healthy soil Weed control Control insect pests Principles of Disease Management

  37. Traditional Principles of Plant Disease Control • Exclusion • Eradication • Protection • Resistance • Therapy

  38. Apply Specific Tactics for: Reduction of Initial Inoculum Reduction of the Infection Rate Reduction of the Duration of the Epidemic

  39. Disease Causing Agents • Fungi • Bacteria • Viruses

  40. Fungi life cycle • Example: Venturia inaequalis (Cooke) Wint • Apple scab

  41. Bacteria • Erwinia amylovora Fire blight

  42. Viruses • Tobamovirus, Tobacco Mosaic Virus

  43. More on plant diseases • Check out this 4 page colored publication from ATTRA’s publication on Organic Integrated Pest Management http://www.attra.org/attra-pub/PDF/IPM/disease.pdf

  44. Healthy Plants = stronger immunity to pests & disease Click on image to start video

  45. Good house keeping skills for controlling disease and pests Click on image to start video

  46. Credits Presentation developed by Dave P. Muehleisen, Evergreen State College. Video segments taken from: “Nothing But Herbs: A Case Study of a Small-Acreage Farm” produced by Ben Troka, University of Idaho College of Agriculture and Life Sciences. Copywrite 2001, University of Idaho Extension. “Weed ‘Em and Reap, Part 2: Reduced Tillage Strategies for Vegetable Cropping Systems.” Produced by Alex Stone, Oregon State University, Department of Horticulture. Copywrite 2005, Oregon State University.

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