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International Society of Arboriculture
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Online CEU Quizzes

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The urban forest is a valuable ecosystem service provider, yet cities are frequently degraded environments with a myriad of stressors and disturbances affecting trees. Vulnerability science is increasingly used to explore issues of sustainability in complex social-ecological systems, and can be a useful approach for assessing urban forests. The purpose of this study was to identify and explore drivers of urban forest vulnerability in a residential neighborhood. Understanding the causes of urban forest change and decline are essential for developing planning strategies to reduce long-term system vulnerability. (A, M, T, Bm)


1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars

Appraisal is a systematic process that uses both quantitative analysis and qualitative judgment to develop and communicate an assignment result of either a cost or a value. (Article by The Council of Tree & Landscape Appraisers) (A, T, Bp, Bm)


2 CEU
ISA Members: $0.00
Retail Price: $12.95
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This article introduces common appraisal terms and core concepts such as value, cost, and the economic principles that provide the foundation for plant and landscape valuation. (A, M, Bs)


1 CEU
ISA Members: $0.00
Retail Price: $12.95
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Volunteerism is one way to handle limited resources for municipal inventories. This study follows the Forest Health Ambassador Program and how it used volunteers to track signs and symptoms of infestations by emerald ash borer, gypsy moth, and Asian longhorned beetle. (A,M,Bs)


1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars

Ken and Rip discuss cuts a climber can use in a tree with a chain saw. The quiz covers the episodes Mismatch Cut & Drop Cut and Hinge Cut & Lifting Cut. (A,T,L,Bp)


0.5 CEU
ISA Members: $4.95
Retail Price: $6.49
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Apple and pear scab caused by the fungal pathogens Venturia inaequalis and V. pirina can be devastating to apples (Malus spp.) and pears (Pyrus spp). This article details two UK field trials that assessed the efficacy of alternatives to the synthetic fungicides frequently used in fruit production, including a range of silicon fertilizers, a resistance-inducing (IR) agent, and a combination of Si + IR. (A,Bs)


1 CEU
ISA Members: $0.00
Retail Price: $12.95
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This second article on nursery production systems discusses the potential influence of production methods on root architecture and growth, pest and disease susceptibility, establishment, drought tolerance, and tree survivability. (A,M,Bs)


1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars

Dendro and Codit are at it again. On a trip to the beach, these two detectives fish for answers of what could cause a stately European beech (Fagus sylvatica) to perish on this lakefront property. Is it natural causes or something more devious? (Original story by James and Thea Komen) (A,T,L,Bs)


1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars

Rip and Ken discuss basic chain saw safety while in a tree. The accompanying quiz covers this episode plus the episodes Making a Felling Plan, Working the Felling Plan, Felling with Forward Lean, Limbing, and Bucking (A,T,L,Bp).


1 CEU
ISA Members: $9.95
Retail Price: $12.95
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This Best Practices Podcast quiz covers Selecting Nursery Stock (Part 1 and Part 2), Tree Planting (Part 1 and Part 2), Mulch Ring, and Staking a Tree. (A,M,Bp)


1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars

While the industry-standard black plastic container has many advantages in woody plant production, circling and girdling roots on plants grown in them can lead to a variety of post-transplant problems. Plants grown in fabric containers may have fewer circling and girdling roots, potentially eliminating some transplant problems. This study evaluated post-transplant root and shoot growth of Pyrus calleryana ‘Glen’s Form’ (Chanticleer®) produced using three container types. (A,Bs)


1 CEU
ISA Members: $0.00
Retail Price: $12.95
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What are the effects of pruning on mature trees? Linda Chalker-Scott presents the current state of science on the physiology of aging trees, which can be used to predict the impacts of conventional and retrenchment pruning on tree health. (A,M,T,L,Bs)


1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars
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