How do I make bug attractants for my deck?
A bowl of watermelon works. I have patio fans. Works wonderfully.
This article shows 3 different ways to attract bugs: https://www.popsci.com/three-diy-bug-traps-that-actually-work/
If you are talking about biting insects, they usually locate their prey by the carbon dioxide they exhale..... put a bottle of open seltzer water in front of your fan.
Plant pots of flowers that have open centers so bugs can easily get to pollen, Fruits or veggies high in sugar content cut open placed in shallow pans,hummingbird syrup in shallow dish/plate (recipe-1 cup sugar 3 cups water bring to boil in saucepan boil low heat 2-3 minutes then remove from heat and cool.), Just water in shallow dishes so they have access to water every living thing needs fresh water, Do not use any Herbicides,Pesticides,Vinegar or Dish soap/detergents on plants around/in your yard. you can also buy bug attractants https://www.arbico-organics.com/category/beneficial-insects-pollinators,build supply houses places for nesting http://pollinatorstewardship.org/index.php/supportive-housing-for-native-pollinators/ buy the beneficial bugs and add then to your yard to get them started High Sierra live Lady Bugs,Uncle Jims Worm Farm,Ebay(Praying mantis egg cases) Arbico organics -Nematodes,Green Lacewing,Praying Mantis,Lady Bugs many more. Leave organic matter in certain places for the ants to get to it they are also beneficial in garden/yard pollinating and helps in decomposing organic matter needed for good soil.
Drop of honey or jam preserve placed in a jar with a little water should do the trick!