| Service Type | Description | Frequency |
|---|---|---|
| Inspections | Regular assessments of tree health and safety | Quarterly |
| Pruning | Trimming and shaping trees to promote growth and aesthetics | Bi-annual |
| Emergency Preparedness | Plans for storm damage and other emergencies | Annual review |
Quantified Tree Risk Assessment for Property Managers
A system of tree risk assessment is proposed that expands concepts developed by others and enables a probability of significant harm to be applied to tree failure risk. By evaluating the components of a tree failure hazard and assigning to them estimates of probability, the proposed system enables the skilled tree inspector to calculate the product of those probabilities to produce a numerical estimate of risk. The use of quantification in the assessment of tree hazards enables property owners and managers to operate, as far as is reasonably practicable, to a predetermined limit of reasonable or acceptable risk.
Quantified tree risk assessment used in the management of amenity trees, 2005
Commercial IPM for Arborists: Effective Pest & Disease Management
During the 1982 growing season a Maryland arborist company cooperated with the Department of Entomology, University of Maryland to determine the effectiveness and commercial feasibility of an IPM program compared to a traditional arborist cover spray program. Over 11,000 plants on 26 client properties that previously had received yearly 3 cover sprays, were switched to a biweekly plant monitoring program. The 20 most common plants composed 70% of the total plants monitored. Of the many potential pests encountered (excluding plant diseases) only 25 types reached pest status and required treatment that consisted of spot spraying with pesticides or hand removal. Time spent monitoring, treating, and interacting with clients averaged 20 minutes for ¼ acre to 50 minutes for 4 acres. Pesticide volume sprayed was reduced by 94% compared to 3 general cover sprays.
Integrated Pest Management for Arborists: Implementation of a Pilot Program1, 1984
Urban Forest Maintenance: Costs & Benefits for Businesses
This paper presents the results of a literature review on the “Costs of Not Maintaining Trees” commissioned by the ISA Science and Research Committee. The authors summarized the literature from within the field of arboriculture/urban forestry to answer the questions: What are the costs of maintaining trees and the urban forest? And, What are the costs of not maintaining trees? Present here is a detailed summary of the literature on the costs of maintenance and lack of maintenance for types of tree care commonly included in municipal budgets (planting, pruning, removal, pest and disease management) and a brief review of costs associated with less-studied types of tree care (including tree risk management; watering; mulching; fertilizing and nutrient management; staking, cabling
The costs of maintaining and not maintaining the urban forest: A review of the urban forestry and arboriculture literature, J Vogt, 2015
