Yes, there are regulations that govern the use of hazardous substances in agricultural plastic products. These regulations vary by country and region but generally aim to protect the environment and human health. For instance, the European Union has the RoHS (Restriction of Hazardous Substances) directive, which restricts the use of certain hazardous substances in electrical and electronic equipment, including those used in agriculture. Similarly, China has its own set of regulations under the Management Methods for the Control of Pollution Caused by Electronic Information Products. Compliance with these regulations is crucial to ensure the safety and sustainability of agricultural practices.