Which condition must be met for a pesticide to be classified as restricted-use?

A pesticide is classified as restricted-use primarily to ensure safety and compliance with regulations governing its application. This classification signifies that the pesticide poses a higher risk of causing harm to the environment, human health, or non-target organisms compared to general-use pesticides. Therefore, it can only be purchased and applied by certified applicators who have received proper training and are knowledgeable about its use, safety protocols, and regulations.

The requirement for only certified applicators to purchase restricted-use pesticides is crucial in minimizing potential risks associated with improper application, thereby protecting both the applicator and the surrounding environment. This is a fundamental aspect of pesticide management focused on ensuring that those handling these substances are adequately equipped to do so safely and effectively.

The other conditions listed do not meet the criteria for restricted-use classification. Environmental permits relate more to regulatory compliance than to the classification itself, restrictions on home use do not inherently classify a pesticide as restricted, and dilution requirements apply to certain products but do not determine use classification.