What is not a common origin of pesticides?

Petroleum-based pesticides are not commonly recognized as a mainstream source for pesticides. While petroleum products can be used in agriculture, particularly as a base for some types of formulations or as an oil-based delivery system, they are not typically classified as a primary source for active pesticide ingredients.

Animal-based pesticides derive from substances produced by animals, such as certain pheromones or natural insecticides like those from frog skin. Plant-based pesticides, on the other hand, are derived from various parts of plants, including oils, extracts, and other phytochemicals known for their pest-repelling properties. Synthetic pesticides are entirely manufactured through chemical processes, and they often represent a large segment of the pesticide market due to their effectiveness and ability to be tailored to specific pest problems.

Therefore, while petroleum products may play a role in the formulation of some pesticide products, they do not represent a direct source of pesticide active ingredients in the same way as the other origins listed.