Which of the following is NOT a form of mechanical control?

Mechanical control methods are techniques used to manage weeds, pests, and unwanted vegetation through physical means rather than chemical applications. Mowing, grubbing, and hand-pulling all involve direct physical actions taken to remove or disrupt plants.

Mowing is a common practice where plants are cut down to prevent them from seeding and to reduce their biomass. Grubbing involves the removal of roots and soil disturbance to eradicate unwanted vegetation. Hand-pulling requires individuals to physically grasp and pull plants out of the ground, including their roots, to remove them entirely.

Mulching, however, does not qualify as a mechanical control method. It is a practice of applying a layer of material (like wood chips, straw, or fabric) to the soil surface to suppress weed growth, retain moisture, and improve soil health. This approach primarily works by blocking light and creating a barrier rather than through physical removal or destruction of the plants.

Understanding the distinctions between these methods helps in choosing the right approach for managing unwanted vegetation effectively in various situations.