Flat mite Dolichotetranychus

Systematic position: The mite Dolichotetranychus carnea belongs to the order Trombidiformes and the family Tenuipalpidae (flat mites). These pests are characterized by their extremely flattened bodies, allowing them to hide efficiently within the microscopic crevices of plant surfaces.

Host plants: This species is a specialized pest primarily affecting succulent plants, with a strong preference for members of the Cactaceae family. In greenhouses and indoor collections, it can cause severe damage to decorative species, leading to stunted growth and aesthetic degradation.

Biology and life cycle: The life cycle encompasses the egg, larva, two nymphal stages (protonymph and deutonymph), and the adult stage. The pest thrives in warm, dry environments, which accelerate its reproductive cycle. Females lay their eggs directly on the plant epidermis, often securing them in deep folds or near the spine clusters of the cacti.

Nature of damage and harm: Feeding by Dolichotetranychus carnea involves piercing the plant tissue and extracting cell sap. This activity causes the formation of necrotic spots, chlorosis, and corking of the epidermis. Chronic infestations weaken the plant's immune system, making it susceptible to secondary infections by various pathogens.

Control measures: Management of this mite requires a strategic approach to maintain plant health and suppress populations:

• Regular monitoring of the plant collection for early signs of infestation.
• Modifying microclimatic conditions, as increased humidity can limit their reproductive rate.
• Application of specialized acaricides if the infestation is heavy.
• Implementing strict quarantine protocols for any new plants introduced into the greenhouse.