GM Watch
  • Main Menu
    • Home
    • News
      • Newsletter subscription
      • News Reviews
      • News Languages
        • Notícias em Português
        • Nieuws in het Nederlands
        • Nachrichten in Deutsch
      • Archive
    • Articles
      • GM Myth Makers
      • GM Reports
      • GM Quotes
      • GM Myths
      • Non-GM successes
      • GM Firms
        • Monsanto: a history
        • Monsanto: resources
        • Bayer: a history
        • Bayer: resources
    • Videos
      • Latest Videos
      • Must see videos
      • Agriculture videos
      • Labeling videos
      • Animals videos
      • Corporations videos
      • Corporate takeover videos
      • Contamination videos
      • Latin America videos
      • India videos
      • Asia videos
      • Food safety videos
      • Songs videos
      • Protests videos
      • Biofuel myths videos
      • Index of GM crops and foods
      • Index of speakers
      • Health Effects
    • Contact
    • About
    • Donations
News and comment on genetically modified foods and their associated pesticides    
  • News
    • Newsletter subscription
    • News Reviews
    • News Languages
      • Notícias em Português
      • Nieuws in het Nederlands
      • Nachrichten in Deutsch
    • Archive
      • 2022 articles
  • Articles
    • GM Myth Makers
    • GM Reports
    • GM Quotes
    • GM Myths
    • Non-GM successes
    • GM Firms
      • Monsanto: a history
      • Monsanto: resources
      • Bayer: a history
      • Bayer: resources
  • Donations
  • Videos
    • Index of speakers
    • Glyphosate Videos
    • Latest Videos
    • Must see videos
    • Health Effects
    • Agriculture videos
    • Labeling videos
    • Animals videos
    • Corporations videos
    • Corporate takeover videos
    • Contamination videos
    • Latin America videos
    • India videos
    • Asia videos
    • Food safety videos
    • Songs videos
    • Protests videos
    • Biofuel myths videos
    • Index of GM crops and foods
  • Contact
  • About

GMWatch Facebook cornfield banner

INTRODUCTION TO GM

GMO Myths and Facts front page.jpg

SCIENCE SUPPORTS REGULATION OF GENE EDITING

Plant tissue cultures

GENE EDITING: UNEXPECTED OUTCOMES AND RISKS

Damaged DNA on fire

GENE EDITING MYTHS AND REALITY

A guide through the smokescreen

Gene Editing Myths and Reality

ON-TARGET EFFECTS OF GENE EDITING

Damaged DNA

CITIZENS’ GUIDE TO GM

GMO Myths and Truths front cover

LATEST VIDEOS

  • Herbicide-tolerant/Bt cotton chaos in Indian fields
  • Seed keepers and truth tellers: From the frontlines of GM agriculture
  • Myths and Truths of Gene-Edited Foods

KEVIN FOLTA: A rogue’s gallery

Roundup, dollars and Kevin Folta

Please support GMWatch

Donations

You can donate via Paypal or credit/debit card.

Some of you have opted to give a regular donation. This is greatly appreciated as it helps place us on a more stable financial basis. Thank you for your support!

Glyphosate directly causes impaired development and mortality in lacewing

Details
Published: 07 February 2023
Twitter

chrysopidae insect green lacewing

Third World Network summarises new study findings

Herbicides are only cursorily tested for effects on non-target arthropods as the assumption is that herbicides only kill insects indirectly by killing its host plants. However, a new study shows that direct oral exposure can be highly relevant for systemic pesticides such as glyphosate-based herbicides. In crop systems including glyphosate-tolerant genetically modified crops, these herbicides and their breakdown products are ingested by crop-associated beneficial insects.

The study tested the effects of oral uptake of the Roundup formulation WeatherMax on larvae of the lacewing Chrysoperla carnea, below the recommended application doses. Long-term oral exposure of C. carnea larvae throughout its juvenile life stages resulted in developmental arrest, impaired cocoon formation and high mortality.

The hazard caused by direct insecticidal action of glyphosate-based herbicides after oral uptake is highly relevant for environmental safety and reveals a gap in regulatory risk assessments that should urgently be addressed, specifically in light of on-going insect decline.

Source of comment: Third World Network
---

A Roundup herbicide causes high mortality and impairs development of Chrysoperla cornea (Stephens) (Neuroptera: Chrysopidae)
N. Defarge, M. Otto & A. Hilbeck
Science of The Total Environment, Volume 865, 2023
https://doi.org/10.1016/j.scitotenv.2022.161158
www.sciencedirect.com/science/article/pii/S0048969722082614?via%3Dihub
23 December 2022

Abstract

Glyphosate has and is being used extensively in herbicide formulations worldwide. Thus, glyphosate-based herbicides (GBH) substantially add to the environmental load of pesticides and warrant a strict risk assessment. Ecotoxicological testing of herbicides focuses on non-target plants and higher animals while direct effects on arthropods are only cursory tested on the premise of contact exposure. However, oral exposure, as we show in our case, can be highly relevant for systemic pesticides, such as GBH. Specifically, in crop systems including genetically modified crops that are tolerant to GBH, these herbicides and their breakdown products are present both internally and externally of the crop plants and, therefore, are ingested by the crop-associated arthropod fauna.

We tested the effects of oral uptake of the Roundup formulation WeatherMax on larvae of the lacewing Chrysoperla carnea, a model organism in ecotoxicity testing programs. Long-term oral exposure of C. carnea larvae throughout its juvenile life stages was tested with concentrations ranging from 0.001 to 1 % dilution, thus, lower than the 1.67 % recommended for field applications. Inhibition of metamorphosis was observable at 0.1 % but at a concentration of 0.5 %, GBH significantly impaired cocoon formation and led to massive lethal malformations. At GBH concentration of 1 % half of the individuals remained permanent larvae and no adult hatched alive. The effects observed followed a clear dose-response relationship.

The hazard caused by direct insecticidal action of GHB after oral uptake is highly relevant for the environmental safety and reveals a gap in regulatory risk assessments that should urgently be addressed, specifically in light of the on-going insect decline.

Menu

Home

Subscriptions

News Archive

News Reviews

Videos

Articles

GM Myth Makers

GM Reports

GM Myths

GM Quotes

Non-GM Successes

Contacts

Contact Us

About

Facebook

Twitter

Donations

Content 1999 - 2023 GMWatch.
Web Development By SCS Web Design