Aspidiotus perniciosus, also known as San Jose scale, is a major pest of fruit trees and ornamental plants. When left unchecked, it can cause significant damage to the plants, leading to stunted growth and reduced yield. There are several synonyms for Aspidiotus perniciosus, including the California red scale, Chinese wax scale, and red scale. Regardless of the name, this pest requires careful management to control its spread. Integrated pest management techniques, such as early detection and monitoring, proper sanitation, and chemical control when necessary, can help prevent Aspidiotus perniciosus from causing irreversible damage to agricultural and horticultural crops.