Which type of pesticide is effective upon contact but loses effectiveness quickly?

Non-residual pesticides are designed to be effective upon contact with pests but are formulated to break down rapidly in the environment. This quick degradation leads to a shorter duration of effectiveness, making them ideal for immediate control of pest populations without leaving long-lasting residues in the environment. This characteristic is particularly useful in situations where a temporary pest control solution is desired and where minimizing environmental impact is a priority.

In contrast, systemic pesticides are absorbed by plants and provide protection over a longer period, traveling throughout the plant to target pests that feed on it. Selective herbicides target specific types of plants, such as weeds, while minimizing harm to desired flora. Insect growth regulators disrupt the life cycle of insects but do not necessarily kill on contact and usually require time to take effect as they alter developmental processes. Thus, non-residual pesticides stand out for their immediate action and quick breakdown.