Oligotoma saundersii

Oligotoma saundersii is a species of webspinner belonging to the order Embioptera, family Oligotomidae. These insects are characterized by their unique ability to produce silk from glands located on their front legs. They construct elaborate silk tunnels or galleries which serve as their habitat, protecting them from predators and environmental extremes.

This pest primarily infests a variety of woody plants, shrubs, and ornamental species. While they are often associated with tropical or subtropical environments, they can become problematic in greenhouses and nursery settings. They typically feed on organic debris, lichens, and fungi, but under high population density, they may damage the bark and tender living tissues of host plants.

The biology of Oligotoma saundersii is closely tied to humidity levels. The life cycle comprises egg, nymphal, and adult stages, all of which occur within the safety of their silk tunnels. Being gregarious, these insects live in colonies, continuously expanding their silk network, which allows them to maintain a stable microclimate essential for their survival and reproductive success.

Damage caused by this pest is primarily physical and aesthetic. The presence of dense silk webbing on stems and branches can impede plant respiration and photosynthesis. Furthermore, the accumulation of these silk galleries can trap moisture and debris, providing a perfect substrate for secondary fungal pathogens that further compromise the health of the plant.

Management and protection strategies focus on disrupting the insect's habitat. Maintaining good greenhouse sanitation by removing old bark, dead plant material, and debris significantly reduces the chances of infestation. If the pest population becomes established, targeted applications of systemic or contact insecticides are recommended to penetrate the silk galleries and effectively eliminate the colony.