Jean-Marc Bonmatin calls for a ban on neonicotinoid insecticides

Neonicotinoid pesticides pose severe threats to ecosystems worldwide, according to new information contained in an update to the world’s most comprehensive scientific review of the ecological impacts of systemic pesticides. The Task Force on Systemic Pesticides (TFSP) released the second edition of its Worldwide Integrated Assessment of the Effects of Systemic Pesticides on Biodiversity and Ecosystems today in Ottawa, Canada. It synthesizes more than 500 studies since 2014, including some industry-sponsored studies.

Jean-Marc Bonmatin pleit voor een verbod op de neonicotinoïden

Neonicotinoide pesticiden (neonics) vormen een grote bedreiging voor de ecosystemen wereldwijd. Dat blijkt opnieuw uit een geactualiseerde uitgave van ’s werelds meest uitgebreide wetenschappelijke evaluatie van de ecologische gevolgen van systemische pesticiden. De Task Force on Systemic Pesticides (TFSP) publiceerde in Ottowa, Canada de 2e editie van de Worldwide Integrated Assessment of the Effects of Systemic Pesticides on Biodiversity and Ecosystems. Het omvat meer dan 500 studies sinds 2014, waarvan ook enkele door de industrie gesponsorde studies.

Planting of neonicotinoid-coated corn raises honey bee mortality and sets back colony development

Worldwide occurrences of honey bee colony losses have raised concerns about bee health and the sustainability of pollination-dependent crops. While multiple causal factors have been identified, seed coating with insecticides of the neonicotinoid family has been the focus of much discussion and research. Nonetheless, few studies have investigated the impacts of these insecticides under field conditions or in commercial beekeeping operations.

Insektensterben muss gestoppt werden

Es kann keinen Zweifel mehr geben, dass das „Insektensterben“ von großer Tragweite ist, für die Landwirtschaft, für die Ökosysteme und die Biodiversität im Land, und nicht zuletzt für alle, die sich einen Frühling ohne Schmetterlinge nicht vorstellen können. Fakt ist ein Rückgang von Insekten und insektenfressenden Wirbeltieren in Deutschland. Als Hauptgrund für dieses „Verschwinden“ wird jeweils der Einsatz von systemischen Insektiziden vermutet. Diese Stoffe wirken auf das Nervensystem und somit auf den Orientierungssinn und das Verhalten von Insekten und anderen Gliedertieren.

Daling van aantal bestuivers zorgwekkend

Sinds de jaren '80 neemt het aantal bijen en andere bestuivers zorgwekkend af. Dat heeft niet alleen gevolgen voor de natuur. Ook de landbouwsector is sterk afhankelijk van bestuivers. Recent onderzoek in België en Noord-Frankrijk heeft aan het licht gebracht dat het lot van de provincie Limburg het sterkst verbonden is aan dat van onze bestuivers, omwille van de fruitproductie, zo meldt Natuurpunt. Kijken we naar de verschillende provincies, dan zien we dat niet elke regio even sterk afhankelijk is van bestuivers.

Die Insekten sterben lautlos

Dass die Insekten auf dem Rückzug sind, ist vielen Menschen nicht bewusst. Eine Ausnahme bilden die Bienen. Ihr Niedergang ist bereits länger bekannt, was unter anderem daran liegt, dass sie als fleissige und nützliche Tiere gelten. Der Rest ist meistens nur lästig. Erst langsam spricht sich herum, dass auch Falter, Fliegen und Wespen bedroht sind.

Insect extinction could be cataclysmic

Individually, insects are not incredibly interesting, unless you get down on the ground or view them under a microscope to look at their complexity. But they are the invisible force working throughout the world to keep it running. There are 1.4 billion insects for each one of us. Insects are “the lever pullers of the world,” says David MacNeal, author of Bugged. They do everything from feeding us to cleaning up waste to generating $57 billion for the U.S. economy alone. Almonds in California or watermelons in Florida wouldn’t be available if it were not for bees.

Thiamethoxam impairs honey bee flight ability

We tested the effects of acute or chronic exposure to thiamethoxam on the flight ability of foragers in flight mills. Within 1 h of consuming a single sublethal dose (1.34 ng/bee), foragers showed excitation and significantly increased flight duration (+78%) and distance (+72%). Chronic exposure significantly decreased flight duration (−54%), distance (−56%), and average velocity (−7%) after either one or two days of continuous exposure that resulted in bees ingesting field-relevant thiamethoxam doses of 1.96–2.90 ng/bee/day.

An academic controversy with practical implications for risk assessment of neonicotinoids

Neonicotinoids act as neurotoxins. Whether the interactions of imidacloprid with its target site in the nervous system – the nicotinic acetylcholine receptor - is reversible or not is an academic controversy which has practical implications for the risk assessment of neonicotinoids. Some scientists argue that imidacloprid irreversibly blocks the nicotinic acetylcholine receptors. Indeed, the lethality of imidacloprid to insects appears to be dependent on the time of exposure: the longer the exposure time, the less amount of total chemical is needed to kill honeybees.

The story of the neonicotinoid insecticides told by environmentalist Graham White

Pollinators have a staunch ally in Graham White. White, a small-scale hobby beekeeper in Scotland, has been an international campaigner on the dangers of neonicotinoid pesticides since 2003. Born into a family of coal miners and glassmakers in an industrial town near Liverpool, England, White developed his love of nature exploring remnant woodlands and abandoned 19th century canals. He credits his 1976 expedition, hiking the John Muir Trail from Yosemite to Mt. Whitney in California, with changing his life.