Board updates on emerald ash borer treatments, schedules pruner-licensing seminars; insurance certificates stressed

Evansville’s Tree Advisory Board on Aug. 7 reported mixed results from recent emerald ash borer (EAB) treatments and advised treating at two-year intervals while infestation levels remain high.

City staff said trees that died despite treatment had treatment cycles of about 2½ years between injections; board members and the arborist reiterated professional guidance that, when EAB pressure is high, treatments should be applied every two years rather than at wider intervals. Staff said they are pursuing sponsorship and funding options through the Saltways District to finance treatments and will follow up with staff member Jean upon her return from vacation.

The board also announced free tree-pruner licensing seminars on Aug. 7 (the same day) and Nov. 6 at the C.K. Newsome Center; attendees who present proof of insurance will be added to the city’s approved tree-pruner list. The board reminded the public to require a current certificate of insurance before hiring tree contractors and noted parks staff (Scott Fankhauser) handles insurance claims for damaged public assets.

Why it matters: EAB continues to threaten ash populations; shorter treatment cycles during high infestation maintain tree health but require ongoing funding. Licensing seminars and strict insurance requirements aim to protect property owners and the city from liability and to ensure qualified work.

Next steps: Staff will pursue funding through the Saltways District for treatment sponsorships, track treated trees on a two-year cycle where warranted, and continue pruner licensing outreach.