Which type of pesticide is packaged in containers larger than 55 gallons?

The correct answer is bulk pesticide, as this term specifically refers to pesticides that are sold or stored in large containers, typically larger than 55 gallons. Bulk pesticides are often intended for commercial or agricultural use, allowing for the handling of larger quantities required for extensive applications. These larger sizes can be more economical for users who need to treat large areas or manage significant pest problems over time.

Concentrated pesticides, while they can also be stored in large containers, generally refer to formulations designed for dilution before use, rather than implying a specific container size. Pest control substances is a broader term that can cover any product used to manage pests, without indicating the size or concentration. Liquid pesticide describes the physical state of the pesticide but does not specify the packaging size or bulk nature, which is key to identifying those that are over 55 gallons.