If you have an ACS member number, please enter it here so we can link this account to your membership. (optional)

ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members.



Europe bans Bayer’s thiacloprid insecticide

Safety and environmental concerns behind decision

by Alex Scott
January 16, 2020 | A version of this story appeared in Volume 98, Issue 3


A photo of a bee on a flower.
Credit: Bayer
Bayer maintains that thiacloprid, a neonicotinoid that is suspected to harm pollinators, can be used safely.

The European Commission has again moved against neonicotinoid insecticides by choosing not to renew a European license for Bayer’s thiacloprid because of health and environmental concerns. It is the fourth neonicotinoid excluded in Europe.

Neonicotinoids, a class of systemic insecticides developed by Bayer and others in the 1990s, are used on food crops globally. The insecticides first gained approval in the European Union in 2004. Some scientists point to neonicotinoids as a cause of declining bee populations.

“The scientific advice from EFSA [the European Food Safety Authority] is clear: there are environmental concerns related to the use of this pesticide, particularly its impact on groundwater, but also related to human health, in reproductive toxicity,” Stella Kyriakides, European commissioner for health and food safety, says in a statement.

Bayer says that it respects the EC’s decision but that it believes thiacloprid-based products “can be used safely.” The company also says it will continue to sell thiacloprid in other regions of the world. “Sixteen European member states confirmed that without thiacloprid, insufficient chemical alternatives remain available for numerous crop-pest combinations,” Bayer says.

Some experts also say that alternatives are lacking. “Despite studies showing that neonicotinoids can pose acute risks to bees and other pollinators, there is still a real requirement for effective substitutes in a number of crop-pest combinations,” says Robert Harwood, managing director of the agriculture consulting firm CPL Business Consultants.


This article has been sent to the following recipient:

Chemistry matters. Join us to get the news you need.