Dr. David Leatherman

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  www.pinheadinstitute.org/com_bearcreek.htm - [Cached Version]
  Published on: 11/16/2007    Last Visited: 11/16/2007  

  Dr. David LeathermanForest Entomologist, State Forester CSU, Pine beetle expert
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  David Leatherman obtained a Bachelor of Science in biology degree from Marietta College in 1971, and a Master of Forestry degree from Duke University in 1974.Leatherman served as the Forest Entomologist for the Colorado State Forest Service (CSFS) which is headquartered at Colorado State University in Fort Collins from 1974 to 2005.His major responsibilities included management of mountain pine beetle and western spruce budworm, the diagnosis of pest injury to trees/wood, he did surveys for gypsy moth, outreach/teaching, aerial detection mapping, and collection of specimens for the arthropod museum at CSU.Dr. Leatherman is currently a consultant.He is the proud father of three boys.David's hobbies include birding and nature photography.
  
  David was born and raised in Columbus, Ohio.As a child, he was always interested in nature and began collecting insects at 8 or 9.In junior high he began watching birds.David's role models were his father, Dr. Edward Thomas (who wrote the Sunday nature column in the Columbus Dispatch), Milton Trautmann (author of the Fishes of Ohio and The Birds of Buckeye Lake), and Dr Carl Venard, who is a mosquito expert and Professor of Entomology at Ohio State University.
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  After acquiring his B.S. from Marietta in 1971, David went to Duke University and received a Master of Forestry degree in 1974, specializing in Forest Protection.
  
  His first and only job was as Forest Entomologist for the Colorado State Forest Service based out of Fort Collins from 1974-2005.With CSFS being part of Colorado State University, his first job involved agency program management and educational approaches to interpreting and improving forest health.The majority of his publications are not research papers, but informational items intended for consumption by practicing foresters and the public.Mountain pine beetle (Dendroctonus ponderosae) was the dominant focus of his years with CSFS, but he also had considerable responsibility for efforts directed at western spruce budworm, smaller European elm bark beetle, spruce beetle, engraver beetles in the genus Ips (including the pinon ips), large aspen tortrix, and western tent caterpillar.He directed the annual, statewide 1500-trap survey for gypsy moths for 21 years.Late in his career, he also conducted aerial surveys of 5 million acres annually and helped teach a junior-level class at CSU titled "Integrated Forest Pest Management".Over his last decade with CSFS he gave 75 presentations per year to various publics, ranging from pre-schoolers to foresters, to pesticide applicators, to college students, to forest landowners.With CSFS, he traveled just under a million miles within Colorado.
  
  Leatherman has discovered approximately 5 species new to science, including Dipogon kiowa, a pompilid wasp only known to occur in Lamar, Colorado.Collecting insects has always been important to his life.It began as fun and remains that way, but now includes a component of urgency to properly document our rich forest insect fauna before it is potentially lost or altered by human development and other environmental changes.Leatherman has deposited several thousand specimens in the Gillette Museum of Arthropod Diversity at CSU, many of them first state records.The bark beetle (family Scolytidae) collection at CSU is regarded as one of the best in the U.S.
  
  As an avid birder, Leatherman has seen 431 species within Colorado and has been part of two new state records: Slaty-backed Gull and Tropical Parula.He was the editor of the Colorado Field Ornithologists' Journal in the mid-1990's.While editor of the CFO Journal, he ran a ten-issue column on this subject.
  
  As a photographer he made two national journal covers (Western Birds), and was selected as the winner of the Colorado Division of Wildlife's Non-game Photo Contest in 1986.A particular interest is documenting the various gallery patterns of bark beetles.
  
  Leatherman enjoys teaching and still give lectures and trainings on topics that occupied his outreach efforts while working with CSFS.

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  www.fortnet.org/Audubon/ptarmigan/p_2000_april.htm - [Cached Version]
  Published on: 4/1/2000    Last Visited: 3/3/2007  

  Leader: Dave Leatherman, 970-416-0193, dleather@lamar.colostate.edu
  
  Sunday, May 7.Bellvue and Rist Canyon.6 AM -11 AM.

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  www.eptrail.com/pages/02friday_u/fri04.html - [Cached Version]
  Published on: 4/26/2008    Last Visited: 4/26/2008  

  Keynote speaker Dave Leatherman will present a program on "Mountain Pine Beetles and the Estes Valley" beginning at 8:30 a.m.He will discuss beetle biology, prevention, and treatment options for beetle-killed trees, all in the context of forest management.
  
  Leatherman was the Forest Entomologist for the Colorado State Forest Service from 1974 to 2005.He is widely recognized as a leading authority on pine beetles.He traveled over 1,000,000 miles in Colorado in his 31 years of service, studying and tracking pine beetles, western spruce budworms, and other forest pests.

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  www.fortnet.org/Audubon/ptarmigan/p_2000_may.htm - [Cached Version]
  Published on: 5/1/2000    Last Visited: 3/3/2007  

  , Leader: Dave Leatherman, 970-416-0193, delather@lamar.colostate.edu
  
  Sunday.Mav 7.Bellvue and RistCanvon.6 AM -11 AM.

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  www.coloradotrees.org/News/news_2000.htm - [Cached Version]
  Published on: 1/1/2000    Last Visited: 5/25/2008  

  Dave Leatherman, of the Colorado State Forest Service presented a slide show on common insects in the area.People all seem interested and wanted to know about them and had lots of question for Dave.Just a note if you have Dave come and talk to a school or chapter meeting give him lots of time because he is a great presenter and can entertain kids and adults with stories of the insect world for hours.

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  uk.jstor.org/news/2005.03/comments.html - [Cached Version]
  Published on: 3/1/2005    Last Visited: 3/11/2007  

  David Leatherman, ForesterColorado State University

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  www.gjsentinel.com/news/content/gen/ap/CO_Beetles.html - [Cached Version]
  Published on: 9/13/2008    Last Visited: 9/13/2008  

  Retired Colorado State Forest Service entomologist Dave Leatherman, who spent his 32-year career studying mountain pine beetles, said the infestation in Fort Collins could be the result of a late flight by mountain beetles that were helped by weather and possibly wind.
  
  "We're all scratching our heads about the source," he said.

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  01.26.02 Workshops give whys and hows of pruning and... - [Cached Version]
  Published on: 1/26/2002    Last Visited: 1/26/2002  

  Dave Leatherman, entomologist for the Colorado State Forest Service, will be giving a workshop 9 a.m. to noon Feb. 12 at the community building at the Mesa County Fairgrounds.This event is jointly sponsored by the Associated Landscape Contractors of Colorado and Colorado State University Cooperative Extension.
  
  {M6If you attended the Western Slope Tree Care Workshop last month, you know that an hour of Dave is not enough!We're very pleased to be bringing him back for more.There will be a $10 charge for the workshop.Please call 244-1834 to register.

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  02.23.02 Trees subject to stress caused by construction - [Cached Version]
  Published on: 2/23/2002    Last Visited: 2/24/2002  

  According to Dave Leatherman, an entomologist with the Colorado State Forest Service, this increase in beetle problems is caused by stress put on the trees by construction.
  
  Root damage, soil compaction and trunk damage caused by construction equipment are just a few of the stresses that open trees up to bark beetle attack.Once bark beetles are attracted and established in an area, they can spread over large areas, killing trees as they move from tree to tree.
  
  Most bark beetles attack trees predisposed to problems such as armillaria root rot, stress, etc.When a spot for a house is cleared and the timber is let lay, beetles are attracted.Quite often old standing stressed trees and freshly downed trees attract these beetles.
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  At a recent workshop coordinated by the Associated Landscape Contractors of Colorado and CSU Cooperative Extension, Dave recommended the application of a preventative spray of permethrin (Astro) or carbaryl (Sevin) for at least the first year after planting.Whenever a tree is planted, it should be protected from beetle attack.A transplanted tree is stressed for at least one year per inch of caliper.In other words, a 3-inch diameter tree will be stressed for three years, thus this tree should be treated for three years.Trees stressed from construction also may need protective sprays for several years.The Ips beetles are active whenever temperatures are above 60 degrees; protective treatments need to be applied to stressed pi–on pines before those temperatures are reached in the spring.Because of the extended flight period of the Ips beetle, Dave recommended a treatment in early spring and again in August.
  
  The mountain pine beetle, common in ponderosa, lodgepole, scotch and limber pine, flies in August.This is a common pest in our mountains with dead and dying trees caused by this beetle seen along the I-70 mountain corridor.Preventative sprays for this insect need to be applied before the August flight.Another pest of evergreens in our area is the balsam bark beetle.This beetle is killing subalpine fir on Grand Mesa and has probably killed more trees in Colorado than any other beetle.This beetle is typically associated with trees infected with armillaria root rot or stress resulting from other problems.

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  05.03.03 Ips beetle continues its assault on forests - [Cached Version]
  Published on: 5/3/2003    Last Visited: 5/6/2003  

  Dave Leatherman, entomologist with the Colorado State Forest Service, said Ips tend to fly whenever temperatures are above 50 degrees.

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