Explore Natural Solutions for Hemlock Woolly Adelgid (HWA)

collecting Data

Evaluation

Our experts can help you designate a treatment area, identify stressors, and approximate level of damage.

The Threat

Hemlock Woolly Adelgid (HWA) is an invasive insect pest from Japan with no local competition.  It now threatens all Eastern and Carolina ​Hemlock Trees.

Designing a Plan

Treatment

HWA Integrated Pest Management (IPM) plans should be environmentally safe, affordable, and flexible.

The Solution

 Sasajiscymnus tsugae (St), the predator of HWA from its native Japan, consumes all stages of HWA and is its most successful biological control since 1995.

Achieving success

Conservation

HWA is an invasive pest with long-term implications, so any solutions must be enacted with a futuristic mindset.

The Future

St beetles have a synchronized life cycle with HWA, offering hope for the long-term survival of our North American hemlock trees and forests.

Pre Order Beetles for 2026 

​In 2025, our amazing team reared over 100,000 beetles to fight Hemlock Woolly Adelgid!

As the only commercial source of biological control agents for HWA, Tree Savers is committed to meeting the need for any private landowners, non-profit organizations, and government agencies.

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