Arboriculture & Urban Forestry quizzes are available free online to members for one year after the date of publication; a maximum of six quizzes are available at any time. CEU quizzes for older articles may be purchased by both members and non-members.
Thiabendazole (TBZ) has long been used in the arboricultural industry for tree injections as a key management tool of Dutch elm disease and sycamore anthracnose. This active ingredient is systemically distributed throughout the canopy and can offer multiple seasons of protection from these diseases. TBZ and other benzimidazole chemistries can be potent nematicides beyond their fungicidal use, disrupting microtubule assembly during mitosis with site-specific binding in some parasites. These nematicidal properties of TBZ allude to its potential in the management of beech leaf disease (BLD). To test TBZ for BLD management, symptomatic beeches were injected in Aurora and Chardon, Ohio, USA, and Hillsborough, New Jersey, USA. Treatments were evaluated using a combination of late-season dormant bud nematode counts and year-over-year change in canopy density and BLD symptom expression. After 11- and 22-months post-treatment, trees significantly improved based on visual ratings, and Lcm was reduced in dormant buds of TBZ injected trees. 1 CEU (A, U, M, T, Bs, Bp)
ISA's scientific journal Arboriculture & Urban Forestry (AUF) helps disseminate new research findings about the management of trees in urban environments. This quiz highlights an article from an issue of AUF with the objective of bridging the gap between scientific research and practical application. Learn about the latest arboricultural research happening around the world while also earning your CEUs.
CEUs for this quiz may be earned only once during the life of your certification.