Southern house spider

Kukulcania hibernalis, commonly known as the southern house spider, belongs to the family Filistatidae. While it is primarily an arachnid predator, its presence in greenhouses and nursery environments is often categorized as a nuisance pest due to its extensive web-building activities on agricultural and ornamental crops.

From a taxonomic perspective, this species is classified within the order Araneae and the family Filistatidae. In agricultural settings, they utilize greenhouse structures and plant stems as foundations for their large, distinctive, funnel-shaped webs. These structures can disrupt the micro-environment of the plants they inhabit.

The life cycle of this species is characterized by longevity and high environmental adaptability. Females are sedentary, occupying their webs for months or even years. This stability allows populations to persist in glasshouses, provided there is a steady influx of prey insects, which are also considered pests of the greenhouse environment.

The primary damage caused by this species is the degradation of crop quality due to heavy web accumulation, which collects dust, debris, and dead insects. This material provides an ideal substrate for fungal growth and secondary plant pathogens. Furthermore, dense webbing acts as a physical barrier that prevents effective coverage of foliage during pesticide application.

Integrated pest management strategies should focus on sanitation and mechanical removal of webs. Maintaining a clean greenhouse environment is essential to reduce potential nesting sites. In severe cases, targeted applications of insecticides or acaricides can be used in the specific crevices where females reside, though chemical control should be secondary to structural management.