Duncan Park Hemlock Wooly Adelgid Survey & Treatment

2026-11-03

The successful bidder shall provide all labor , materials , equipment , supervision , and reporting necessary to complete the following services : 1 ) Site Survey and Inventory Update Update the 2019 hemlock inventory and conduct a current field assessment . Deliverables shall include : A . Tree Inventory Verification ● Confirm and update tree locations ● Update or replace tree tags as necessary ● Record Diameter at Breast Height ( DBH ) ● Note any new , missing , or removed trees B . Pest Assessment ● Classify infestation severity using a consistent and clearly defined rating system ( see Attachment # 2 , for an example ) ● Document presence of Elongate Hemlock Scale ( EHS ; Fiorinia externa ) C . Tree Health Evaluation ● Document overall tree health and canopy condition ( see Attachment # 2 , for an example ) ● Identify stress factors that may impact treatment efficacy ● Note excessive pest pressure or declining tree health ● Identify trees recommended for removal , if applicable 2 ) Hemlock Treatment Services Treatment shall be performed in accordance with all current federal and state pesticide regulations and label requirements . A . Standard Treatment ● Administer trunk injections of imidacloprid for all trees with low to moderate HWA infestation and sufficient health to respond to systemic treatment . B . Elevated Infestation Treatment ● Trees exhibiting excessive HWA infestation would be treated with dinotefuran , if appropriate . ● Trees treated with dinotefuran must be clearly marked and documented to ensure proper follow - up with imidacloprid in future treatment cycles . C . Treatment of Small Diameter Trees ● Trees below approximately 5 inches DBH require an alternative treatment method when appropriate , which may include - Soil drench , Soil injection or Basal bark treatment ( where label permits ) D . Application Requirements ● All product selection and application rates must comply with current label instructions . ● Contractor shall follow industry best practices for trunk injection to minimize tree injury . ● Contractor shall ensure environmental protection measures are implemented during application .

MITN

2026-04-29