How does clean culture reduce insect and disease problems in vegetable fields?

In vegetable farming, clean culture is a practice where the soil is kept free of all competing plants through frequent cultivation, the use of protective coverings (mulches), and the application of weed killers.1

This method reduces insect and disease problems primarily by eliminating weeds that serve as host plants for these pests and disease-incitant organisms. By removing these alternative hosts, the field becomes less hospitable to the pests that would otherwise thrive or survive in the area. Maintaining a clean field is a key component of effective soil management, helping to ensure that crops are produced with minimal labor while mitigating the risks posed by various agricultural pests.1