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Dave Hanson's Bugs and Tree Cruds 2010-10-25
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Dave Hanson's Bugs and Tree Cruds 2010-10-25

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A collection of images identifying common insects, fungi and issues in our urban forest. …

A collection of images identifying common insects, fungi and issues in our urban forest.
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  • Curtis young – Joe Boggs and others from The Ohio State University identified this critter on hybrid elms in TRE
  • Annual cicada – about the size of your thumb – much to large for EAB – but often green and often collected and put forth as a possible EAB find.
  • Annual cicada – about the size of your thumb – much to large for EAB – but often green and often collected and put forth as a possible EAB find.
  • Transcript

    • 1. 20Dave Hanson,,Universityof Minnesota 1-17-2010 Snow fleas on a warm January Day
    • 2. 20Dave Hanson,,Universityof Minnesota Snow fleas on a warm January Day 1-17-2010
    • 3. 20Dave Hanson,,Universityof Minnesota Brown ambrosia aphid on Jerusalem artichoke Notice the cornicles an Id characteristic for aphids Uroleucon ambrosiae
    • 4. 20Dave Hanson,,Universityof Minnesota Ambrosia aphid on Jerusalem artichoke
    • 5. 20Dave Hanson,,Universityof Minnesota Oleander aphids on Swamp milkweed Aphis nerii
    • 6. 20Dave Hanson,,Universityof Minnesota Aphids and Associated damage On Green Ash
    • 7. 20Dave Hanson,,Universityof Minnesota Woolly Aphids on speckled alder Paraprociphilus tessellatus
    • 8. 20Dave Hanson,,Universityof Minnesota Woolly Apple Aphids (Erisoma lanigerum)
    • 9. 20Dave Hanson,,Universityof Minnesota Balsam twig aphid Or Balsam wooly adelgid balsam fir
    • 10. 20Dave Hanson,,Universityof Minnesota Spittle bug on goldenrod
    • 11. 20Dave Hanson,,Universityof MinnesotaFir broom rust on Abies balsamea
    • 12. 20Dave Hanson,,Universityof Minnesota Hackberry Witches Broom ... Eriophyid mite and Powdery Mildew
    • 13. 20Dave Hanson,,Universityof Minnesota Phomopsis galls on Bitternut Hickory 2010-3-22
    • 14. 20Dave Hanson,,Universityof Minnesota Salt spray accumulation Causes witches brooms 2-23-2008 2-23-2008
    • 15. 20Dave Hanson,,Universityof Minnesota Witches broom caused by Salt spray accumulation 2-7-2008
    • 16. 20Dave Hanson,,Universityof Minnesota Frost damage on Bur Oak
    • 17. 20Dave Hanson,,Universityof Minnesota Hackberry Tatters ... Suspected - herbicide damage to buds 5-26-2004
    • 18. 20Dave Hanson,,Universityof Minnesota Photo Taken: 7-29-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    • 19. 20Dave Hanson,,Universityof Minnesota Photo Taken: 8-24-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    • 20. 20Dave Hanson,,Universityof Minnesota Photo Taken: 8-24-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    • 21. 20Dave Hanson,,Universityof Minnesota Photo Taken: 7-29-09 Japanese Beetle – Defoliator... Popillia japonica Newman
    • 22. 20Dave Hanson,,Universityof Minnesota European elm flea weevil A first report for Minnesota 8-05-09 Adult feeding activity Orchestes alni A side view of the Elm flea weevil. Photo credit: Jim Zablotny, USDA/APHIS/PPQ. Blotch mines caused by larvae
    • 23. 20Dave Hanson,,Universityof Minnesota Emerald ash borer Agrilus planipennis Fairmaire
    • 24. 20Dave Hanson,,Universityof Minnesota Purple Trap for Emerald ash borer (EAB) Photo taken at the Gateway Arch in St. Louis, MO July of 2008
    • 25. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Annual Cicada ... Tibicen canicularis
    • 26. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Locust borer ... Megacyllene robiniae
    • 27. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Calligrapha species on ninebark
    • 28. 20Dave Hanson,,Universityof Minnesota Tar spot on Silver maple
    • 29. 20Dave Hanson,,Universityof Minnesota Eyespot gall on Acer rubrum
    • 30. 20Dave Hanson,,Universityof Minnesota Eriophyid mite galls Silver maple 2008-6-19
    • 31. 20Dave Hanson,,Universityof Minnesota Eriophyid mites Spindle Gall on American Plum Photo: 6-17-09
    • 32. 20Dave Hanson,,Universityof Minnesota Erineum Gall on Viburnum Photo: 9-01-09 Eriophyid mites
    • 33. 20Dave Hanson,,Universityof Minnesota Ash flower gall (mites) On green ash
    • 34. 20Dave Hanson,,Universityof Minnesota Sawfly larvae on Mugo pine
    • 35. 20Dave Hanson,,Universityof Minnesota Sawfly and damage on Red pine
    • 36. 20Dave Hanson,,Universityof Minnesota Forest tent caterpillar newly emerged 2010-4-13
    • 37. 20Dave Hanson,,Universityof Minnesota Forest tent caterpillar
    • 38. 20Dave Hanson,,Universityof Minnesota Forest tent caterpillar 4-30-07 Same Twig 5-10-07
    • 39. 20Dave Hanson,,Universityof Minnesota Eastern tent caterpillar On choke-cherry
    • 40. 20Dave Hanson,,Universityof Minnesota Eastern tent caterpillar Eggmass On choke-cherry
    • 41. 20Dave Hanson,,Universityof Minnesota Loopers or inch-worms on little-leaf linden
    • 42. 20Dave Hanson,,Universityof Minnesota Spiny Elm Caterpillar on Hackberry
    • 43. 20Dave Hanson,,Universityof Minnesota New Old Eastern spruce gall (adelgid) White spruce
    • 44. 20Dave Hanson,,Universityof Minnesota Noxious Gall on Swamp white Oak (Cynipid wasp)
    • 45. 20Dave Hanson,,Universityof Minnesota Bullet gall on Bur oak
    • 46. 20Dave Hanson,,Universityof Minnesota
    • 47. 20Dave Hanson,,Universityof Minnesota Wooly adelgid on Douglas fir
    • 48. 20Dave Hanson,,Universityof Minnesota Wooly adelgid on Douglas fir
    • 49. 20Dave Hanson,,Universityof Minnesota Scurfy Scale on Quaking Aspen
    • 50. 20Dave Hanson,,Universityof Minnesota Walking stick or stick bug Photo: 9-12-09
    • 51. 20Dave Hanson,,Universityof Minnesota Northern Paper Wasp Devouring a caterpillar Photo: 9-12-09
    • 52. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Boxelder bug – adult and nymphs 09-01-2009
    • 53. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Plant Hopper 2010-8-12 09-01-2009
    • 54. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Green Darner (female) 2010-8-15 09-01-2009
    • 55. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Verticillium wilt ... Staining of vascular tissue
    • 56. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 erticillium wilt ... Staining of vascular tissue
    • 57. 20Dave Hanson,,Universityof Minnesota Herbicide damage ? No! ‘Contorta’ white pine
    • 58. 20Dave Hanson,,Universityof Minnesota Iron chlorosis on Pin oak
    • 59. 20Dave Hanson,,Universityof Minnesota Anthracnose on Bur Oak
    • 60. 20Dave Hanson,,Universityof Minnesota Quince rust on Hawthorn
    • 61. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 11-07-2009 Cedar-Hawthorn Rust or Cedar-apple rust
    • 62. 20Dave Hanson,,Universityof Minnesota Cedar apple rust On Eastern Red Cedar
    • 63. 20Dave Hanson,,Universityof Minnesota Cedar-Hawthorn rust Upper leaf surface on Hawthorn
    • 64. 20Dave Hanson,,Universityof Minnesota Cedar-hawthorn rust Aecia – underside of leaf
    • 65. 20Dave Hanson,,Universityof Minnesota Red admiral on Little-leaf linden
    • 66. 20Dave Hanson,,Universityof Minnesota Frost crack and associated internal decay Red maple
    • 67. 20Dave Hanson,,Universityof Minnesota Black knot on Black cherry
    • 68. 20Dave Hanson,,Universityof Minnesota Sapsucker damage on: Eastern red cedar Butternut
    • 69. 20Dave Hanson,,Universityof Minnesota Sapsucker damage on: Paper Birch
    • 70. 20Dave Hanson,,Universityof Minnesota Rabbit damage crabapple
    • 71. 20Dave Hanson,,Universityof Minnesota Volcano mulching Or Architectural mulching
    • 72. 20Dave Hanson,,Universityof Minnesota Proper Staking ?? NO! Nails are not acceptable Wire through hose is not acceptable Connections Too Rigid
    • 73. 20Dave Hanson,,Universityof Minnesota Proper Staking Wide straps Stem is protected 3 taut connections
    • 74. 20Dave Hanson,,Universityof Minnesota Birds nest fungi in mulch
    • 75. 20Dave Hanson,,Universityof Minnesota Dog-vomit slime mold Fuligo septica
    • 76. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Stinkhorn fungi Lizard’s claw Lysurus cruciatus A rare site in Anoka County,MN Photographer: Unknown
    • 77. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Stinkhorn fungi Ravenal’s stinkhorn Phallus ravenelii 2010-10-17
    • 78. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    • 79. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    • 80. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    • 81. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on poplar 2008-6-21
    • 82. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on American elm 2006-9-25
    • 83. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    • 84. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi
    • 85. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on Populus tremuloides 2006-10-2
    • 86. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Wood decay fungi on Box elder
    • 87. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Rhizomorphs of Armillaria root rot
    • 88. 20Dave Hanson,,Universityof Minnesota Sensitive fern Onoclea sensibilis
    • 89. 20Dave Hanson,,Universityof Minnesota High-bush cranberry Viburnum trilobum
    • 90. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Beaked Hazel ... Corylus cornuta
    • 91. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Smilax sp ... dioecious
    • 92. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Ginkgo Biloba dioecious
    • 93. 20Dave Hanson,,Universityof Minnesota Bristly greenbrier in winter Smilax tamnoides American hops in winter Humulus lupulus
    • 94. 20Dave Hanson,,Universityof Minnesota Moonseed in winter Menispermum canadense Bittersweet in autumn Celastrus scandens
    • 95. 20Dave Hanson,,Universityof Minnesota Poison Ivy
    • 96. 20Dave Hanson,,Universityof Minnesota Flowers of Sugar maple Male and Female flowers are present, often on the same branch
    • 97. 20Dave Hanson,,Universityof Minnesota 4-17-2009 Flowers of red maple Male -Staminate Female - Pistillate
    • 98. 20Dave Hanson,,Universityof Minnesota Flowers of boxelder
    • 99. 20Dave Hanson,,Universityof Minnesota Korean Mountain Ash Sorbus alnifolia
    • 100. 20Dave Hanson,,Universityof Minnesota Autumn Blossom of Witchhaze l Hamamelis virginiana
    • 101. 20Dave Hanson,,Universityof Minnesota Ribes spp. blossom near Cotton, MN. 2010-4-18
    • 102. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Austrian Pine Pinus nigra Pollen release
    • 103. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 11-07-2009 Scots Pine Pinus sylvestris Buds, 2-needle pine, stomate lines
    • 104. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Sour Cherry ... Prunus cerasus
    • 105. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Eastern Cottonwood ...
    • 106. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Hackberry, Celtis occidentalis
    • 107. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Black Chokeberry ... Aronia melanocarpa
    • 108. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Black Chokeberry ... Aronia melanocarpa
    • 109. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Winterberry ... Ilex verticilatta
    • 110. 20Dave Hanson,,Universityof Minnesota Photo Taken: 9-14-09 Red Oak ... Quercus rubra