Download the full-sized PDF of Contributions to the Life History, Host Range, and Distribution of Necremnus tidius (Hymenoptera: Eulophidae)Download the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Biological Sciences, Department of


This file is in the following collections:

Journal Articles (Biological Sciences)

Contributions to the Life History, Host Range, and Distribution of Necremnus tidius (Hymenoptera: Eulophidae) Open Access


Author or creator
Dosdall, L. M.
Gibson, G. A. P.
Olfert, O.
Keddie, B. A.
Ulmer, B. J.
Additional contributors
Ceutorhynchus neglectus
Courtship behavior
Ceutorhynchus obstrictus
Spatio-temporal distribution
Parasitoid development
Type of item
Journal Article (Published)
Abstract: Field and laboratory studies investigated the preimaginal developmental time, adult emergence phenology, mating behavior, and weevil hosts of Necremnus tidius (Walker) (Hymenoptera: Eulophidae), a solitary ectoparasitoid of coleopteran larvae. In addition, changes in parasitism levels of the cabbage seedpod weevil, Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae), by N. tidius were determined during 2003-2005 in commercial fields of canola (Brassica rapa L. and Brassica napus L.) in southern Alberta and Saskatchewan, Canada. Mean +/- SE developmental time from egg to adult was 18.3 +/- 0.23d for specimens reared at 21 degrees C and a photoperiod of 12:12 (L:D) h. Emergence began in late July in commercial fields near Lethbridge, AB, and 20 d later 81% of the population bad emerged. Emergence was completed by the end of August. Mating was preceded by a complex courtship behavior with the male standing on the dorsum of the mesosoma and gaster of the female, flapping its wings without flight, leaning forward and stroking its antennae over the antennae of the female, leaning back, and repeating the sequence several times. The native weevil Ceutorhynchus neglectus Blatchley was determined to be an alternate host of N. tidius in central and northern Alberta. N. tidius was found in few commercial canola fields in 2003, but in 2004, it occurred over hundreds of thousands of hectares of canola cropland, reaching peak parasitism levels of 45%. In 2005, N. tidius was still common, but parasitism declined relative to that observed in 2004.
Date created
License information
© 2007 Entomological Society of America. This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America.
Citation for previous publication
Dosdall, L. M., Gibson, G. A. P., Olfert, O., Keddie, B. A., & Ulmer, B. J. (2007). Contributions to the Life History, Host Range, and Distribution of Necremnus tidius (Hymenoptera: Eulophidae). Annals of the Entomological Society of America, 100(6), 861-868. DOI: 10.1603/0013-8746(2007)100[861:CTTLHH]2.0.CO;2.
Link to related item

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 520575
Last modified: 2015:10:12 11:59:37-06:00
Filename: AESA_100_2007_861.pdf
Original checksum: d9e3ba8dca12976f67457d00fc96ae55
Well formed: false
Valid: false
Status message: Unexpected error in findFonts java.lang.ClassCastException: edu.harvard.hul.ois.jhove.module.pdf.PdfSimpleObject cannot be cast to edu.harvard.hul.ois.jhove.module.pdf.PdfDictionary offset=1888
Page count: 8
Activity of users you follow
User Activity Date