| Literature DB >> 24144574 |
Margaret C Wirth1, Colin Berry2, William E Walton3, Brian A Federici4.
Abstract
The interaction of Mtx toxins from Lysinibacillus sphaericus (formerly Bacillus sphaericus) with Bacillus thuringiensis subsp. israelensis Cry toxins and the influence of such interactions on Cry-resistance were evaluated in susceptible and Cry-resistant Culex quinquefasciatus larvae. Mtx-1 and Mtx-2 were observed to be active against both susceptible and resistant mosquitoes; however varying levels of cross-resistance toward Mtx toxins were observed in the resistant mosquitoes. A 1:1 mixture of either Mtx-1 or Mtx-2 with different Cry toxins generally showed moderate synergism, but some combinations were highly toxic to resistant larvae and suppressed resistance. Toxin synergy has been demonstrated to be a powerful tool for enhancing activity and managing Cry-resistance in mosquitoes, thus Mtx toxins may be useful as components of engineered bacterial larvicides.Entities:
Keywords: Cry toxins; Mtx toxins; Resistance; Resistance Management; Synergy
Mesh:
Substances:
Year: 2013 PMID: 24144574 PMCID: PMC3956600 DOI: 10.1016/j.jip.2013.10.003
Source DB: PubMed Journal: J Invertebr Pathol ISSN: 0022-2011 Impact factor: 2.841