Sirex Woodwasp Identifying Characteristics: 1 – 1 ½” long

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Presentation transcript:

Sirex Woodwasp Identifying Characteristics: 1 – 1 ½” long Do not have narrow waists like many wasps Metallic blue-black color Females have orange legs Males have orange in abdomen and black hind legs

Sirex Woodwasp Relationship between Fungus and Wasp Mucus kills tree cells and fungus eats dead cells Wasp injects toxic mucus + fungus into tree while depositing eggs Wasp eggs hatch and larvae feed on fungus Mature wasp exits tree and carries mucus and fungus to another tree

Sirex Woodwasp Common Host Trees North American Pines Targets only one plant family (Pine) Scots Pine White Pine

Sirex Woodwasp Map – Range of Sirex Woodwasp

Sirex Woodwasp What to Look For Small, round exit holes Heavy needle fall and wilting Progressive color changes at the top of the tree Resin from egg-laying on branch and trunk Brown fungal staining of sap wood 1 2 3 4 5

Sirex Woodwasp What to Look For Small, round exit holes Heavy needle fall and wilting Progressive color changes at the top of the tree Resin from egg-laying on branch and trunk Brown fungal staining of sap wood 1 2 3 4 5

Sirex Woodwasp What to Look For Small, round exit holes Heavy needle fall and wilting Progressive color changes at the top of the tree Resin from egg-laying on branch and trunk Brown fungal staining of sap wood 1 2 3 4 5

Sirex Woodwasp What to Look For Small, round exit holes Heavy needle fall and wilting Progressive color changes at the top of the tree Resin from egg-laying on branch and trunk Brown fungal staining of sap wood 1 2 3 4 5

Sirex Woodwasp What to Look For Small, round exit holes Heavy needle fall and wilting Progressive color changes at the top of the tree Resin from egg-laying on branch and trunk Brown fungal staining of sap wood 1 2 3 4 5

YEAR-ROUND: Heavy needle fall or wilting; Small, round exit holes. Sirex Woodwasp What to Look For (cont.) LATE FALL/ EARLY WINTER: Attacked trees have pale green, yellow or red needles at the top. LATE SUMMER/ EARLY FALL: Flight time for adults begins. YEAR-ROUND: Heavy needle fall or wilting; Small, round exit holes.

Sirex Woodwasp Additional Resources Southern Regional Extension Forestry http://southernforesthealth.net/ USDA http://www.na.fs.fed.us/spfo/pubs/pest_al/sirex_woodwasp/sirex_woodwasp.htm Don’t Move Firewood http://www.dontmovefirewood.org/gallery-of-pests/woodwasp.html EDDMaps: Reporting App for Smartphones http://www.eddmaps.org/