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International Society of Arboriculture
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International Society of Arboriculture
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Detective Dendro®

Since its conception in 2004, Detective Dendro, the Diagnostic Sleuth, has been a highly popular print series with a regular feature in Arborist News magazine. In 2010, this educational and entertaining series became available as one of our ArborPod™ series.

Join Detective Dendro as he uses his professional knowledge of tree science, expert diagnostic skills, and gut instincts of a “hard-boiled detective” to investigate and identify his clients’ biotic and abiotic tree disorders. Assisted by his young apprentice, Codit, they inspect a wide range of mysterious tree afflictions, dispel the “red herrings,” and uncover the signs and symptoms that lead them to accurately diagnose trees in a variety of exotic places.

If you have comments or a favorite topic in arboriculture that you would like to learn more about, please contact us at isa@isa-arbor.com.

NameReleasedDescriptionAudio FileCEU Quiz
The Case of Avocado Aficionado June 08, 2018 An assertive homeowner hopes his avocados will be the talk of the town, but the trees refuse to bear fruit. Detective Dendro is summoned to fix the problem. Will the solution be easy? (Original story by James Komen) (A,Bs) Play

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The Case of the Rooftop Restaurant April 13, 2018 Dendro and Codit are called to West Los Angeles by a building manager charged with tending to eight declining olive trees that are the key feature of a 41st floor outdoor restaurant. Is it Xylella fastidiosa or something else? Will Dendro and Codit have a solution in The Case of the Rooftop Restaurant? (Original story by James Komen) (A,M,Bp) Play

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The Case of the Mystery Driveway February 02, 2018 Dendro and Codit get a late Friday afternoon request. A new homeowner wants to know why his beautiful oak tree that was in pristine condition 6 months ago is now nearly dead. Dendro and Codit are on the case to figure out what caused the decline! (Original story by James Komen) (A,M,Bm) Play

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The Case of the Quercus Calamity December 01, 2017 Dendro has been busy since the storm season started. For this case, Dendro and Codit investigate why a large oak tree failed and fell across a house. It’s the Case of the Quercus Calamity! (Original story by James Komen)(A,M,Bs) Play

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The Case of the Deficient Palms October 16, 2017 Dendro finds himself once again on the hunt. In beautiful Oceanside, California, an allée of date palms are yellowing. It’s the Case of the Deficient Palms. (Original story by James Komen and Don Hodel)(A,T,M,L,Bs) Play

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The Case of the Mysterious Sugar Maple August 01, 2017 Dendro and Codit are fresh off a week in D.C. at the annual ISA Conference and Trade Show when presented with a unique challenge; a pest targeting native as well as non-native trees, and even inanimate objects in the vicinity! It’s the Case of the Mysterious Sugar Maple. (Original story by Cláudia Coleoni)(A,M,Bs) Play

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The Case of the Movie Star Trees June 08, 2017 Dendro and Codit are called out to assess a stand of trees once featured on the silver screen and now suffering from bad pruning. Will it be an Oscar moment for the two arborists, or just rotten tomatoes in the Case of the Movie Star Trees. (Original story by James Komen)(A,M,Bm) Play

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The Case of the Defiant Ficus April 07, 2017 Dendro and Codit trade the end of winter in North America for a trip south of the equator to help diagnose a blight spreading through the region’s favored ficus’. Can they spot the cause before fica ficus becomes a Brazilian memory? It’s the Case of the Defiant Ficus (Original story by Cláudia Coleoni)(A,M,Bp) Play

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The Case of Justine's Junipers February 10, 2017 Dendro and Codit take on a case that sounds like something from the “X-Files”; a bright orange blob of tentacles suddenly appearing on healthy trees in The Case of Justine’s Junipers (Original story by Sharon Lilly)(A,M,Bm) Play

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The Case of the Redwood Roots December 07, 2016 Dendro and Codit respond to distressed client blaming a destroyed concrete patio on a nearby redwood. Will the tree have to come out? Is a past drainage problem really to blame, will Codit ever finish washing Dendro’s car? These answers and more in The Case of the Redwood Roots. (Original story by James Komen) (A,M,Bp) Play

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The Case of the Eloquent Elephant October 07, 2016 Dendro and Codit travel across Europe and end up helping diagnose an aging giant in Sweden in the case of the Eloquent Elephant (A,M,Bm) Play

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The Case of the Plane Plan August 02, 2016 Dendro and Codit are across the pond at the UK’s Arboricultural Association’s annual conference when duty calls; a fungi is attacking London Plane trees, and local folks are up in arms. Can Dendro’s UK cohorts calm the masses and save the trees? It’s the case of the Plane Plan!(Original story by Sharon Lilly)(A,M,Bm) Play

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