Funnel web spiders are a common sight in Ontario homes, and while generally not aggressive, their presence can be unsettling. Many homeowners reach for Raid or other readily available insecticides, only to find the spiders persist. This article explores why Raid might not be effective against funnel spiders in Ontario, and offers comprehensive solutions for effective control and prevention.
Why Won't Funnel Spiders in Ontario Die with Raid?
Raid, and similar over-the-counter insecticides, often contain pyrethroids. While effective against many insects, pyrethroids aren't always a guaranteed kill for spiders, especially funnel-web spiders. Several factors contribute to this:
- Spray Application: Spiders often hide in dark, hard-to-reach places. A simple spray might not directly contact the spider, rendering the insecticide ineffective.
- Spider Physiology: Spiders have a different physiology than insects, making them potentially less susceptible to certain insecticides. Their exoskeletons and metabolic processes can contribute to a reduced sensitivity to pyrethroids.
- Resistance: Overuse of insecticides can lead to resistance in pest populations. If pyrethroids have been used extensively in your area, the local funnel spider population might have developed a degree of resistance.
- Incomplete Kill: Even if the spider is affected, it might not die immediately. It could retreat to its web and die later, leaving you with the false impression that the treatment failed.
What are the Best Ways to Get Rid of Funnel Web Spiders?
While Raid might offer some temporary relief, more effective methods exist for controlling funnel spiders in Ontario homes.
1. Identifying and Locating Spider Webs
The first step is identifying the location of funnel web spider webs. These webs are typically funnel-shaped, often found in dark, undisturbed corners, under eaves, in sheds, garages, and woodpiles. Thorough inspection is crucial.
2. Removing Webs and Spiders Manually
The most straightforward method is physically removing webs and spiders. Use a broom or a vacuum cleaner with a hose attachment to remove webs and any visible spiders. Dispose of the collected material carefully outdoors.
3. Using More Effective Insecticides
If manual removal isn't sufficient, consider using insecticides specifically designed for spiders or that contain active ingredients other than pyrethroids. Always follow the manufacturer's instructions carefully and prioritize safety.
4. Professional Pest Control
For persistent infestations or if you're uncomfortable handling spiders yourself, contacting a professional pest control service is the best option. Professionals possess the knowledge and tools to identify the species, determine the extent of the infestation, and implement effective, long-term control measures. They often use more powerful and targeted insecticides.
Are Funnel Web Spiders Dangerous?
While the bite of a funnel web spider in Ontario is rarely life-threatening, it can be painful and cause localized swelling. Most people experience only mild symptoms. However, if you suspect a bite, it's always best to seek medical attention.
What Attracts Funnel Spiders to Homes?
Funnel spiders are often drawn to homes by:
- Food Sources: Insects like flies, moths, and other spiders provide a food source.
- Shelter: Dark, undisturbed areas, such as basements, attics, and sheds provide ideal habitats.
- Moisture: Damp areas can attract both spiders and their prey.
How Can I Prevent Funnel Spiders From Entering My Home?
Preventing funnel spiders is far more effective than dealing with infestations. Here are some preventative measures:
- Seal Entry Points: Repair cracks and gaps in walls, windows, and doors to prevent spiders from entering.
- Reduce Clutter: Decluttering reduces potential hiding places for spiders and their prey.
- Clean Regularly: Regular cleaning removes food sources and discourages spiders from settling.
- Landscape Management: Keep vegetation trimmed back away from the house, reducing their access points.
By combining proactive prevention strategies with targeted control measures, you can effectively manage funnel web spider populations in your Ontario home, even if Raid alone proves insufficient. Remember, safety is paramount; if you're unsure about any method, consult a professional pest control service.
