Spiders belong to the class Arachnida. They have 8 jointed legs and its body is divided into two sections, the abdomen and the cephalothorax (a fused head and thorax section).
There is a wide range of spiders, and they vary greatly in appearance and behaviour. There are only a few spider species that pose a threat to humans. Some of the more commonly encountered spider species on the Eyre Peninsula are listed below with some information.
Whitetailed Spider Lampona murina (Formerly Lampona cylindrata)
Common on the Eyre Peninsula, the whitetailed spider is generally a dark grey to black spider with a cigar shaped body finishing with a characteristic white spot on the end of its abdomen.
It is commonly found outdoors around mulch and leaf matter, behind bark on trees and under rocks etc. Upon wandering indoors it can be found under couches, fridge's etc but particularly bathrooms.
Although the whitetailed spider is not always aggressive, it will administer a painful bite if touched or placed against the body within clothing or a towel etc. Bites can be very painful, and even cause ulceration around the area of the bite.
Black House Spider Badumna insignis
Black house spiders are a dark brown to black spider. The female is usually about 15mm to 18mm in body length but can get even larger.
Black house spiders are commonly found around window and door frames, and especially around pergolas and patios. They make a messy web, usually with a distinctive round entry, not unlike a funnel shape.
The black house spider will bite if provoked, generally causing some local pain and swelling, but can cause an allergic reaction in some people, which requires medical treatment.
Redback Spider Latrodectus hasselti
||This spider occurs throughout the Eyre Peninsula and many of our requested spider treatments target this potentially deadly pest.|
The female redback is usually 12-15mm in body length with a smooth black body with a flash of red or orange on its abdomen. The redback can give a painful bite, causing illness and if medical assistance is not sought can cause death.
Redbacks can be found in stacked items, leaf matter, sheds, and other quiet dark places. Redbacks make an untidy web and will be more likely to bite when she is guarding her egg sacs which can contain up to 2 000 babies.
Treatment of Spiders
The effective long-term control of spiders is very much so dependent on the treatment of areas that spiders accumulate and breed such as roof cavities, etc. The treatment alone of webs and adjacent walls, surfaces, etc., will only minimize problems for a short time. Even though spiders that come into contact with treated webs will be affected, many spiders can remain alive after spray treatments by retreating back into roof cavities, walls etc. and they will endeavour to construct their new webs away from areas with residual chemical present. Dusting or misting of roof cavities and/or wall cavities is a must for effective long-term spider control & indicates professionalism of treatment.