Ornamental and Turf Pesticide Applicators Practice Exam

For effective weed management, what is a common practice?

1. Applying herbicides only

2. Fertilizing constantly regardless of growth

3. Mowing at an appropriate height

4. Watering excessively

The correct answer is: Mowing at an appropriate height

Mowing at an appropriate height is a common practice for effective weed management because it promotes the health of the turf or ornamental plants while discouraging weed growth. Maintaining the correct mowing height allows grass to compete more effectively against weeds. When grass is cut too short, it can become stressed and weakened, creating an opportunity for weeds to thrive. Conversely, mowing at the recommended height helps ensure that the grass can photosynthesize adequately, establish strong roots, and outcompete less desirable plant species. This practice also reduces the likelihood of weeds producing seeds, as the taller grass can cover the soil more effectively. Additionally, healthy grass can shade the soil, which can inhibit weed seed germination. Overall, appropriate mowing height is a crucial cultural practice that supports the overall health of the landscape and contributes to integrated weed management strategies. In contrast, focusing solely on herbicide application, fertilization without regard to the plant's needs, or excessive watering can lead to imbalances in the ecosystem, potentially promoting weed growth or causing other turf problems.