Bijen

Here we demonstrate for the frst time that field-realistic concentrations of the commonly used neonicotinoid insecticide thiacloprid can severely affect the immunocompetence of Osmia bicornis. In detail, males exposed to thiacloprid solutions of 200 and 555µg/kg showed a reduction in hemocyte density. Moreover, functional aspects of the immune defence - the antimicrobial activity of the hemolymph - were impaired in males. In females, however, only a concentration of 555µg/kg elicited similar immunosuppressive efects.

In un'intervista con i sottotitoli inglesi, il tossicologo Henk Tennekes spiega le sue idee sul deragliamento della tossicologia. È dell'opinione che, in particolare, la tossicità cumulativa dei pesticidi nell'ambiente durante la procedura di autorizzazione non sia sufficientemente studiata e quindi spiega la massiccia mortalità degli insetti negli ultimi anni.

https://youtu.be/D73HFu-CjZM

Dans une interview avec des sous-titres anglais, le toxicologue Henk Tennekes explique ses idées sur le déraillement de la toxicologie. Il est d'avis que, notamment, la toxicité cumulée des pesticides dans l'environnement lors de la procédure d'autorisation n'est pas suffisamment étudiée et explique ainsi la mortalité massive des insectes ces dernières années.
https://youtu.be/D73HFu-CjZM

In einem Interview mit englischen Untertiteln erklärt der Toxikologe Henk Tennekes seine Ideen zur Entgleisung der Toxikologie. Er ist der Ansicht, dass insbesondere die kumulative Toxizität von Pestiziden in der Umwelt während des Zulassungsverfahrens nicht ausreichend untersucht wird, und erklärt damit die massive Insektensterblichkeit in den letzten Jahren.

https://youtu.be/D73HFu-CjZM

Beekeepers around the world have been reporting the ongoing weakening of honeybee health and subsequently the increasing colony losses since 1990. However, it was not until the abrupt emergence of colony collapse disorder (CCD) in the 2000s that has raised the concern of losing this important perennial pollinator. In this report, we provide a summary of the sub-lethal effects of pesticides, in particular of neonicotinoids, on pollinators’ health from papers published in peer-review journals.

Solitary bees are frequently exposed to pesticides, which are considered as one of the main stress factors that may lead to population declines. A strong immune defence is vital for the fitness of bees. However, the immune system can be weakened by environmental factors that may render bees more vulnerable to parasites and pathogens.