What size does the entrance need to be in a plastic tote “bio-pod” for native adult flys to enter? A Purdue BSFL publication has conflicting sizes. First, the publication says to use 1" PVC pipe; but then it says to use a 1" circular saw to cut holes for the PVC pipe. 1" PVC has an outside diameter of 1.3", so a 1" hole obviously will not work for 1" PVC. On the other hand, 3/4" PVC has a 1" outside diameter. So which is the correct PVC pipe size? 3/4" PVC or 1" PVC? i.e., What size hole do the flies need? Remember, the pipe size is (roughly) the inside diameter, not the outside diameter.
Or perhaps either size will work equally well…?
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