Which is a common method for managing weeds in IPM?

Integrated Pest Management (IPM) emphasizes a holistic approach to managing agricultural pests, including weeds, by using a combination of techniques that are environmentally sustainable and economically viable. The correct answer highlights the use of both mechanical methods and biological control as common strategies within IPM.

Mechanical methods involve physical practices such as mowing, tilling, or hand-pulling weeds, which help in reducing weed populations without relying solely on chemicals. Biological control refers to the use of natural predators or competitors to suppress weed growth, promoting a more balanced ecosystem. By integrating these methods, IPM aims to minimize reliance on chemical herbicides, thereby reducing potential negative impacts on the environment and human health.

This approach contrasts sharply with solely applying chemical herbicides, which can contribute to resistance in weed populations and negatively affect non-target species. Eliminating all ground cover is not advisable because ground cover can prevent soil erosion and provide habitat for beneficial organisms. Ignoring the weed problem entirely allows it to proliferate, ultimately leading to more severe infestations and higher management costs.