Fig. 1.
Petri dish choice bioassay arena. The arena consisted of: a) glass Petri dish base, b) two filter-paper halves (treated/control, or control/control), c) O-ring seal, d) glass Petri dish lid, and e) junction of filter-paper halves.
Petri dish choice bioassay arena. The arena consisted of: a) glass Petri dish base, b) two filter-paper halves (treated/control, or control/control), c) O-ring seal, d) glass Petri dish lid, and e) junction of filter-paper halves.