Final answer:
Nonselective (broad-spectrum) pesticides are primarily used for widespread pest control.
Step-by-step explanation:
Nonselective (broad-spectrum) pesticides are primarily used for widespread pest control. These pesticides are designed to target a wide range of pests rather than specific species. They are commonly used to control pests that pose a threat to crops, such as weeds, fungi, insects, and other organisms. While nonselective pesticides can be effective at controlling pests, they can also have negative impacts on non-target organisms and the environment.