Check this seasonal guide to know what to expect for habitat management and protection: information now available for Spring 2018 invasive pest management.
- March to June – inject bark or soil with systemic insecticide.
- First leaf to late May – use Bacillus thuringiensis (Bt).
- June to July pupae – use insecticides.
- Mechanical method all year, capture and terminate life.
Emerald Ash Borer:
- Treat before tree the has 1/3 damage and prune dead limbs.
- February to November – inject systemic insecticide for control.
- No good contact insecticides.
Hemlock Wooly Adelgid:
- Inject systemic treatments for the entire year of control and supplement with spraying to eliminate pest.
- Mid April to June – while nymph and adult is active, spray insecticide.
- July to March – while nymph and adult is active, spray insecticide.
- Beetle carnivores are slow and have mixed results.
- Mechanical are destructive to the tree.
Spotted Lantern Fly:
- May to December – treat with systemic insecticide and contact insecticide.
- Mechanical methods have limited effect on large populations.
- Select capture trees such as Tree of Heaven (Ailanthus).