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Ok I have a huge spiders. On my lake I have a small covered boat dock that holds two boats. The problem is it is infested with spiders. I spray every single week and seems almost they are immuned. The spiders are everywhere the boats, the roof, and the docks. Any suggestions on how I can get rid of them?

spiders are very hard to kill due to the fact that don't clean themselves unlike other insects. I have been told the best way to rid your place of spiders is to get rid of the other bugs that spiders eat.

Home Defense Max kills them. You can get it at home depot. I have Black Widows BAD! It kills em dead quick like and in a hurry. Spray their web and stomp the egg sacks. Otherwise, call the exterminator, they will tell you what to do.

I second Home Defense, I spray it around my apt for everything

Try Demon WP if you can get it. That's what the exterminators will use if they come to your house.

Amen on the Demon will tear a spiders' booty up!! Very good for them thats we recommend here at The Co-op!!

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Put up a bird feeder, the birds will eat the spiders as well.......ok, I just made that up......

most of this stuff isnt gonna harm fish

I have found something that works even better than the Home Defense stuff, and it is organic. It is called "Hi-Yield Indoor/Outdoor Broad Use Insecticide". Got it at a farm supply company. It came highly recommeded by an expert re farm chemicals. Just follow the directions. It will absolutely nail spiders and kill them for weeks after the application. It kills all other insects as well. You will need your own sprayer to apply it --- hand-held spot sprayer is what I use.