Which of the following is NOT a method to control Dandelion?

Using high nitrogen fertilizers is not a method to control dandelions. In fact, applying high nitrogen fertilizers can inadvertently promote the growth of dandelions, as well as other broadleaf weeds. These fertilizers enhance the lush growth of grasses and can lead to an imbalance in the lawn ecosystem, allowing dandelion populations to thrive.

On the other hand, using a selective herbicide like Devrinol 50-DF can effectively target dandelions without harming desirable plants. Hand pulling is a manual removal method that works well if done thoroughly, particularly for smaller infestations. Applying mulch can help suppress dandelion growth by blocking sunlight and preventing seed germination. Thus, while the other methods can assist in controlling dandelions, high nitrogen fertilizers do not serve this purpose and are counterproductive in managing weed populations.