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Complimentary materials. Wood with Sirex wood wasp damage Wood with other wood wasp damage (if we can find this at U of MN). Adult and larval Sirex wood wasps Adult non-target wood wasps Wood with pine sawyer damage Adult and larval pine sawyers. Schiff et al. 2006. Schiff et al. 2006.
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Complimentary materials • Wood with Sirex wood wasp damage • Wood with other wood wasp damage (if we can find this at U of MN). • Adult and larval Sirex wood wasps • Adult non-target wood wasps • Wood with pine sawyer damage • Adult and larval pine sawyers
Schiff et al. 2006 Schiff et al. 2006 Wood wasps / Horntails • 1 to 1.5 inches long • “Horn tail” and lack narrow “waist” • 23 species in US and Canada • 2 on hardwood, 21 on softwood • 19 native, 4 exotic
Which insect is a wood wasp? N. Wright, FDACS, Bugwood.org F. & K. Starr, U.S. GS, Bugwood.org G. Alpert, Harvard Univ., Bugwood.org
K. E. Zylstra K. E. Zylstra The Sirex Woodwasp The Female The Male ● 1 to 1.5 inches long ●Dark metallic blue-black body ●Legs reddish-yellow, feet black ●Antennae entirely black Similar to females, but… ●Middle portion of abdomen orange ●Hind legs black
Which insect is the Sirex wood wasp? N.Wright, FDACS, Bugwood.org PDIL, Bugwood.org PDIL, Bugwood.org
K. E. Zylstra K. E. Zylstra The Larva ● Creamy white ●Legless ●Dark spine at tip of abdomen
Siricids are commonly referred to as horntails because of their cornus on the posterior end Currently, there is no morphological key for siricid larvae and a molecular key is being developed by the USFS. K. E. Zylstra
Which larva is a wood wasp? D. Cappaert, MI State Univ., Bugwood.org H. Pase III, Texas F.S., Bugwood.org S. Kinelski, , Bugwood.org
K. E. Zylstra When you cut through the tree sometimes you can see where you cut through a gallery K. E. Zylstra Finely packed frass in the tunnel
K. E. Zylstra Larval Galleries
K. E. Zylstra Larval galleries K. E. Zylstra
K. E. Zylstra Adult male chewing his way out…
Resin beads Browning/thinning crown Woodpecker damage Exit holes Symptoms of Attack ***The Sirex wood wasp can attack living trees, while native wood wasps attack dead or dying trees***
Resin beads K. E. Zylstra K. E. Zylstra K. E. Zylstra Scots Pine Red Pine White Pine Resin Beading Looks Different On Different Pine Species…
K. E. Zylstra K. E. Zylstra Infested Scots Pine
K. E. Zylstra K. E. Zylstra Infested Red Pine
K. E. Zylstra K. E. Zylstra Infested White Pine
K. E. Zylstra K. E. Zylstra Exit HolesPerfectly circular, size ranging from 1/8 to 3/8 inch diameter
Which holes are Sirex wood wasp exit holes? J. Hodge, Univ. of Kentucky, Bugwood.org R.. Billings, TX F.S., Bugwood.org D. Haugen, U.S. F.S., Bugwood.org
K. E. Zylstra K. E. Zylstra