Join Date: May 2007
Thanked 10 Times in 10 Posts
Rep Power: 9
Re: Dealing with spiders at the dock
I've had a lot of success with doing the occasional spider hunt. Most boat spiders hide out during the day, and start their web building after the sun goes down. By the time it gets dark, all the spiders are available to be eliminated.
I use a spray can insecticide called Hot Shot. It's water based and kills on contact quickly. As soon as it's completely dark, I use a flashlight to locate the spiders, and then give each a short blast of the Hot Shot. Avoid the temptation to blast again. One short blast, and in a few minutes the spider is belly up.
I do the boat, and the dock. I spray additionally around the pilings where they like to build their webs. I also spray the areas where I know they like to hide during the day.
Once you've finished your spider hunt, you have killed all the spiders. They are not a colony insect, so there aren't a thousand more where you can't see them.
Do a thorough hunt one night, and the next night you're spider free. My boat is 31 feet, in a 40 foot slip, and the hunt only takes about 5 minutes.