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Plant Disease

Plant Disease. 1. What are two things that cause most plant diseases?. Improper growing environment Microorganisms. Proper Growing Environment Includes: Moisture Light Air Nutrients Proper temperature. 2. What are the 3 types of microorganisms that cause plant disease?. Bacteria

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Plant Disease

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  1. Plant Disease

  2. 1. What are two things that cause most plant diseases? Improper growing environment Microorganisms • Proper Growing Environment Includes: • Moisture • Light • Air • Nutrients • Proper temperature

  3. 2. What are the 3 types of microorganisms that cause plant disease? Bacteria Viruses Fungi

  4. 3. How can bacteria get into plants? Enter plants through stoma or through wounds

  5. 4. Sketch and label the three shapes of bacteria. Coccus Bacillus Spirella

  6. 5. What are the 3 most common diseases caused by bacteria? Rot Leaf Spot Blight

  7. 6. What are 2 common diseases caused by viruses? Mosaic Yellows

  8. 7. What are 3 diseases caused by fungi? Rusts Mildews Smuts

  9. 8. How do insects spread plant diseases? By feeding on plants, especially insects with piercing-sucking mouthparts

  10. 9. What are the 2 plants disease caused by soil fungi? Root Rot Damping Off

  11. 10. List 2 methods of preventing soil-borne diseases? Soil pasteurization Coat seeds with fungicides

  12. 11. What kind of plant diseases are spread by wind? Rust diseases

  13. 12. How do humans spread plant diseases? Pruning, watering, hoeing

  14. 13. What can we do to prevent the spread of plant disease by humans? Basic sanitation, disinfecting equipment

  15. 14. How can we prevent the spread of plant disease when watering plants? Avoid splashing water and soil on plants

  16. 15. Resistant varieties Some plants are resistant to some diseases

  17. 16. Quarantine Keep diseased plants away from healthy plants

  18. 17. Sanitation Burn diseased plants Remove weeds Remove debris Remove diseases limbs from trees

  19. BLACK SPOT Fungi: Marssonina rosae

  20. Black Spot Fungi

  21. Septoria leaf spot Fungi: Septoria albopunctata

  22. Bacterial Leaf Spot Xanthomonas campestris

  23. FIRE BLIGHT Bacteria: Erwinia amylovora

  24. LATE BLIGHT Fungi: Phytophthora infestans

  25. LATE BLIGHT

  26. Phytopthora Fungi

  27. Blight Fungi

  28. EARLY BLIGHT Fungi – Alternaria solani

  29. EAR ROT Fungi: Fusarium moniliforme

  30. BLOSSOM END ROT Cause: Lack of calcium uptake during dry weather

  31. BROWN ROT Fungi: Monilinia fructicola

  32. STEM RUST Fungi: Puccinia graminis

  33. CORN SMUT Fungi - Ustilago maydis

  34. CORN SMUT Fungi - Ustilago maydis

  35. Powdery Mildew Fungi – Blumeria graminis

  36. Verticillium Wilt Fungi – Verticillium albo-atrum V. dahliae V. longisporum

  37. Tomato Spotted Wilt Virus

  38. GALLS Most galls are caused by irritation and/or stimulation of plant cells due to feeding or egg-laying by insects such as aphids, midges, wasps, or mites. Some galls are the result of infections by bacteria, fungi, or nematodes and are difficult to tell apart from insect-caused galls.

  39. CANKER Fungi – Cytospora sp.

  40. TOBACCO MOSAIC VIRUS Virus - Tobamovirus

  41. VIRUS STRUCTURE

  42. Damping Off Fungi - Rhizoctonia solani

  43. Damping Off Fungi – Pythium sp.

  44. Pythium oospores inside plant root.

  45. Anthracnose Fungi - Colletotrichum coccodes

  46. Sclerophoma - dieback Fungi

  47. Sparassis Fungi

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