Under the Pest Control Products Act, which of the following is required for a pesticide to be legally sold in Canada?

For a pesticide to be legally sold in Canada, it is necessary for the manufacturer to undergo a rigorous approval process, which includes obtaining the manufacturer's label approval. This requirement ensures that the product has been thoroughly assessed for its safety, efficacy, and environmental impact. The label must accurately reflect the contents of the pesticide, the intended use, application instructions, precautions, and any safety warnings. This regulatory framework, governed by the Pest Control Products Act, is crucial for protecting public health, safety, and the environment.

The other options provided do not align with the legal requirements for pesticide sales in Canada. Research institution endorsements and public opinion surveys are not compulsory for the regulatory approval process under the Pest Control Products Act. Similarly, state government approval is not a factor; rather, the federal regulatory body provides the necessary oversight for pesticides sold across the country.