English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  Glyphosate-based herbicides are one of the most commonly used compounds to control perennial weeds around the world. This compound is very persistent in the environment and tends to filter into aquatic ecosystems, affecting non-target species such as mosquito larvae.  Aedes aegypti  mosquitoes are vectors of multiple arboviruses such as dengue and Zika. Glyphosate can be degraded into non-harmful environmental compounds by  Lysinibacillus sphaericus , a spore forming bacterium which can also kill  Ae. aegypti  larvae. In this study, we assessed the effect of glyphosate concentrations, typically used in Colombia, on the entomopathogenic activity of  L. sphaericus  against  Ae. aegypti  larvae.    Methods  Bioassays and toxicity curves were performed to compare the larval mortality between different treatments with and without bacteria and glyphosate (Roundup 747®). Larvae were exposed to both bacteria and glyphosate by adding the compound on chloride-free water. Comparisons were made using both probit regression and ANOVA analysis.    Results  ANOVA showed a significant difference in larval mortality when adding glyphosate and  L. sphaericus  at the same time. Thus, a positive synergic effect on larval mortality was found when  L. sphaericus  and glyphosate were mixed. According to probit analysis, median lethal dose (LD50) for bacterial mixture was of 10 6.23  UFC/ml and for glyphosate was 2.34 g/l.    Conclusions  A positive synergic effect on the mortality of larval  Ae. aegypti  when exposed to  L. sphaericus  mixture and glyphosate was found. Molecular studies focusing on the toxin production of  L. sphaericus  are required to understand more about this synergistic effect.

Synergistic effect of Lysinibacillus sphaericus and glyphosate on temephos-resistant larvae of Aedes aegypti