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AUF January 2020
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  • AUF January 2020
CEUs are available for this product.

Incidence of Internal Decay in American Elms Under Regular Fungicide Injection CEU Quiz

By Nicholas J. Brazee and Robert E. Marra

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The incidence and severity of internal decay was assessed in 210 landscape American elms using sonic and electrical-resistance tomography. Sampled trees were partitioned into two fungicide injection groups: (1) regular injection; and (2) irregular injection or no known history of injection. The proportion of American elms with decay under regular injection (28/91; 31%) was nearly identical to non-injected elms (35/119; 29%). The results show that American elms undergoing regular fungicide injection do not experience a significantly higher frequency of internal decay compared to non-injected elms. (A, M, 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.

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