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These guys won't be bees, they will be wasps. Wasps are meat eaters. They are building under your deck because something around your deck is providing them with convenient food, water and building material. Look in your gutters and make sure they are clean and draining well. Clogged gutters are frequently the attraction as they provide both food and water. Look around your yard for aphid infestations on plants. Aphids are an excellent food source for wasps. They are probably stripping the soft wood in the grain of your decking...if you see them appear to be landing on and crawling around the wood of your deck that is what they are doing. The wood will take on a "weathered" look that is really material being removed and masticated for use in building the hive. Get rid of the food and water sources and the wasps will go find someone else to bother. Once you get rid of the bees put bug screen up. It can be stapled onto the wood. My husband I were forced to do that with our patio because we have a 55 year old Wisteria over-hanging and if we wanted to eat out on the patio the wasps would try getting at our food. The screen did the trick!

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18y ago

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