What is a significant advantage of using insecticides?

Using insecticides provides a significant advantage in that they are effective and fast-acting. This characteristic is crucial for addressing pest issues quickly, as it helps prevent extensive damage to plants and other landscape elements. When a pest infestation occurs, timely application of insecticides can halt the proliferation of insects, protecting crops and ornamentals from harm. The rapid action of many insecticides ensures that pest populations can be managed effectively before they cause significant economic loss or impact the aesthetic value of a landscape.

In contrast, while other options might highlight certain aspects of insecticide use, they do not capture the primary benefit associated with their application in pest management. For example, cost-effectiveness varies based on the specific product and situation; promoting plant growth is not a function of insecticides but rather fertilizers; and the claim of having no side effects is misleading, as all pesticides can have unintended effects on non-target organisms and the environment. Thus, highlighting the effectiveness and speed of insecticides in controlling pests is the key advantage that justifies their use in turf and landscape management.