This will minimize the potential for an infestation when you plant the following season. Pests can overwinter in plant material. Clean up leaves, stems and other plant debris in the spring. Mulches Mulches are materials placed on top of the soil and are effective in reducing weed and insect pests. Materials such as landscape cloth, wood and bark chips or plastic can be used to reduce weeds.
Mulches also help retain soil moisture and warmth.
Companion Planting Different plants attract different pests, and repel different pests. Companion planting involves planting things together strategically so that one plant repels the pests that the other may attract. Although this theory is sometimes recommended it may not be effective in managing pests. Companion plants are usually aromatic plants such as onions, garlic and herbs planted in or around crops to prevent infestation. Basil is commonly recommended as a companion for tomatoes, and marigolds are used to repel nematode pests from certain crops.