What is the main advantage of slow-acting non-repellents for pest control?

The primary advantage of slow-acting non-repellents in pest control is their ability to remain undetectable to insects, allowing them to be transferred throughout the colony. This characteristic enables insects to consume the pesticide without realizing that it is present in their environment since they do not experience any immediate effects. As a result, the slow action of these pesticides allows for greater exposure within the colony, as one affected insect can interact with or share the pesticide with others through grooming or social behaviors. This leads to a more effective control of the entire population as the lethal effects are gradually spread.

The other options do not accurately capture the significant benefit provided by slow-acting non-repellents.