If unopened, the glue boards for the Catchmaster Ovi - Catch AGO Mosquito Trap will last indefinitely as long as they are stored in a cool, dry place. Once in use, they should be replaced every 30 days, or sooner if they become full.
Yes, the Catchmaster Ovi - Catch AGO Mosquito Trap Replacement Glue Boards for the Catchmaster Ovi - Catch AGO Mosquito Trap can be purchased separately
According to a rep with the manufacturer, they typically suggest 4-8 Catchmaster Ovi Catch Mosquito Traps per acre depending on the habitat on the property. So 3-4 for a half acre should do great. Be sure to follow all the instructions with the traps to achieve the best results.
The Catchmaster Ovi - Catch AGO Mosquito Trap - box (2 traps and 2 glue boards) is going to cover roughly ¼ to ½ acre (10k to 20k sq ft) approximately. Each bucket will cover 5k to 10k sq ft. It is recommended to use 4 to 8 bucket traps per acre.