Spiders are a pest when they bite, produce unsightly webbing or cause fear in those with arachnophobia.
There are many people with a fear of spiders. Nearly all spiders produce venom* but there are few spiders in New Zealand that can cause harm to humans. They include the white tail spider, the Australian Redback and the native Katipo.
Many spiders produce webs and webbing that can be unsightly around the eaves and gutters of houses or on fences and furniture.
*Only two spider families, Uloboridae and Holarchaeidae, are known to be non-venomous, i.e., lacking venom glands; however, their fangs can inflict infections spread through the skin, which in theory could represent more danger than from bites of non-lethal venomous spiders.
Crawling insects and spiders are effectively controlled by treating surfaces with residual insecticide. Insects and spiders that contact treated surfaces are rapidly killed and in many cases the surfaces become repellent to insects and so acts as a barrier to insect pests.
Note: Daddy Long Legs Spiders often cause problems by building untidy webs in the corners and on ceilings in the home. Their long legs and tiny bodies enable them to with stand walking on insecticide treated surfaces and can be more difficult to control for this reason. But direct spraying of the spiders or use of Kiwicare fumigators will control them.
For best results wash down surfaces to remove dust and dirt before spraying. Allow a couple of days for spiders to rebuild their webs then spray surfaces and webs. Leave for a further couple of days and then brush down webbing with a dry brush.
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