Which pesticide typically has a narrow spectrum of activity?

The correct choice is indeed narrow spectrum pesticides, as they are specifically designed to target a limited range of pests or diseases. This means they are more selective in their action and are intended to minimize non-target effects on beneficial organisms and the surrounding environment.

Narrow spectrum pesticides work by addressing specific pests or problems, allowing for more precise pest management. This selectivity can be beneficial in agricultural practices, as it reduces the risk of harming beneficial insects or plants that do not pose a threat to crops.

On the other hand, herbicides and fungicides can have varying spectra of activity, but they are generally categorized based on whether they target certain types of plants (in the case of herbicides) or fungi (in the case of fungicides) rather than being inherently narrow or broad spectrum. Broad spectrum pesticides, on the contrary, are designed to affect a wide variety of pests, which can lead to unintended consequences.