What is a key consideration in companion planting for pest management?

In companion planting, a key consideration for effective pest management is the practice of planting beneficial crops nearby to deter pests. This strategy relies on the understanding that certain plants can influence the growth and health of neighboring crops positively. Specific plants may produce natural repellents for pests or attract beneficial insects that prey on pest species, thereby reducing pest populations in the garden or field.

For instance, marigolds are commonly planted alongside vegetables because they exude compounds that repel nematodes and other harmful insects. Similarly, certain herbs like basil can enhance the growth of tomatoes while also deterring pests like aphids. This holistic approach promotes a balanced ecosystem, which is crucial for sustainable pest management and reduces the reliance on chemical control methods.