Which of the following is not a method of controlling pests?

Mulching is not a method of controlling pests. Mulching is a technique used in agriculture and gardening to suppress weed growth, retain moisture in the soil, and regulate soil temperature. It involves covering the soil around plants with a layer of organic or inorganic material such as leaves, straw, plastic, or rocks. Although mulching can improve crop yields by providing a favorable growing environment, it does not control pests directly. The other options listed are methods of controlling pests. Quarantine involves isolating infested plants or animals to prevent the spread of pests. Crop rotation involves planting different crops in a particular field in a sequence to break the pest cycle. Fumigation involves exposing crops to gaseous chemicals to kill pests. Trapping involves capturing pests using baits or sticky traps to reduce their population.