Eteobalea intermediella
Scientific name: Eteobalea intermediella
Order/Family: Lepidoptera / Cosmopterygidae
Photo by: Rich Hanson, USDA-ARS http://www.nysaes.cornell.edu/ent/biocontrol/weedfeeders/eteobalea_intermedi...
Description:
The adults are usually about 8-9 mm long. Their wingspan is 16-18mm. Their wings are their most defining characteristic. They are dark brown with black and white spots.(1)Life cycle:
The Wintering stage: Eteobalea intermediella winters as a larvae and they stay inside the root until late summer and early fall. (1)
The Egg stage: The eggs are layed in the leaf axils on the lower part of the stem in strands of 3-8.(1)
The Larval stage: The newly hatched lavae mine down into the roots and feed on the root cortex. As many as 3-7 larvae can by found in the root system of one plant dependidng on the size of the roots.(1)
The Pupal stage: The pupal stage takes place in the root crown or the base of the stem in late summer to early fall.(1)
The Adult stage: The Adults are visible in late summer and early fall and live for a couple of weeks. They are about 8-9 mm long. The adults do not feed while in this stage. The adults live for about two weeks. After mating the females lay eggs in strands of 3-8 and can lay up to 180 eggs.(1)Damage to host: The damage to the host is all done in the larval stage. The targeted plants are Dalmation and yellow toadflax. The E. intermediella does not usuallykill the host plant, but for the most part it decreases the flowering and seed production and lowers the vitallity of the plant.(1)
Favorable release habitats: They prefer grasslands and places along the road infested with yellow or Dalmatian toadflax.(1)How and Where to Collect: Collect the adults with a sweep net in late summer at sites where they are established (with permission of course!). They are not well established yet in the United States. Contact your local weed fighters to see if this insect is available.(2)
Where and How to Purchase:
They are not well established yet in the United States. Contact your local weed fighters to see if this insect is available.(2)Remarks: This insect is particuarlly hard to find so your local weed management district might not have them. But if you can get them I wish you good luck! [Doug]
Links:
1. University,http://www.nysaes.cornell.edu/ent/biocontrol/weedfeeders/eteoba...
2. http://www.for.gov.bc.ca/HFP/PUBS/INTEREST/Bioagent/dalmat.htm
3. http://res2.agr.ca/lethbridge/weedbio/agents.htm
4. http://www.3rivers.net/~tomelpel/weedsinfo/Linaria_spp.htm
5. http://www.epa.gov/docs/fedrgstr/EPA-GENERAL/1996/October/Day-09/p...
6. http://scarab.msu.montana.edu/mchr/11mch010.htm
7. http://www.co.larimer.co.us/depts/pubwor/weeds/toadflbio.html
8. http://www.mtweed.org/Identification/PROJECT/Newsletter/newsletter.html
9. http://scarab.msu.montana.edu/mchr/11mch010.htm#A100
10. http://www.ibiblio.org/london/BEN/ben52
Literature Cited:
(1) 1/14/02, Eteobalea intermediella, Rich Hanson, Cornell University, http://www.nysaes.cornell.edu/ent/biocontrol/weedfeeders/eteobalea_intermediella.html(2)1/14/02, Dalmatian toadflax Linaria dalmatica (L.) Miller,1997 Ministry of Forests, Province of British Columbia, Canada,
http://www.for.gov.bc.ca/HFP/PUBS/INTEREST/Bioagent/dalmat.htm.
By Doug T. and Hoss P. 1/24/02
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