This is an Accepted Article that has been peer-reviewed and approved for publication in the Insect Science but has yet to undergo copy-editing and proof correction. Please cite this article as doi: 10.1111/1744-7917.12209. This article is protected by copyright. All rights reserved. 1 Title for subject: Gregarious pupation as a defensive mechanism Title for author: C. Roberge et al. Correspondence: Éric Lucas, Université du Québec à Montréal, Département des Sciences Biologiques CP 8888, Succ. Centre Ville, Montréal, Québec, Canada, H3C 3P8. Original article Gregarious pupation act as a defensive mechanism against cannibalism and intraguild predation Claudia Roberge 1 , Bruno Fréchette 1 , Geneviève Labrie 2 , François Dumont 1 and Éric Lucas 1 1 Université du Québec à Montréal, Département des Sciences Biologiques CP 8888, Succ. Centre Ville, Montréal, Québec, Canada, H3C 3P8, 2 Centre de recherche sur les grains Inc (CÉROM), 740 chemin Trudeau, St-Mathieu-de-Beloeil, Québec, Canada, J3G 0E2.