Last century saw the development of many chemical pesticides. Initially seen as a saviour, they imposed a heavy toll on the natural environment and humankind. Avoidance of chemicals allows nature to take control. Consumers have become reliant on produce being blemish-free. Pest and disease need not be a problem if infestation is low.
Slight blemish indicates an increased chance of the produce being grown organically.
Many alternate methods to chemical use are worth trying. Cultural methods, Physical controls, Natural sprays and dusts, Biological controls, Companion planting, Quarantine. Choose the right crop variety for your area. A stressed plant will be susceptible to pest and disease. Keep plant growing healthy.