How does a rosemary bush get infected with rosemary beetles?

Rosemary bushes can become infected with rosemary beetles primarily through the introduction of adult beetles, which are often transported by wind, animals, or humans. These beetles lay their eggs on the plants, and once the larvae hatch, they feed on the leaves, causing damage. Additionally, the beetles are attracted to stressed or unhealthy plants, making proper care and maintenance crucial for prevention. Regular inspections and management can help mitigate infestations.