A termite monitor has a lid 116 while the body 117 contains attractant (not shown) usually timber slats and there are openings in the base 118 and in the side walls at 119, 120. The monitor in this case is of the type 11 that fits on the ground but it will be appreciated that the bag aspect may be applied to any situation including in ground monitors. A hole may be pre - formed with a removable patch or simply cut at the time of application. When termites are present in the monitor/detector the termites block off an observation opening in the lid 116 and this is the tell-tale sign that it is time to bait. A bait applicator 114 has an opening 122 matched to the opening 121 when an adhesive patch cover sheet 106 is removed so that the bait unit is secured in place with holes aligned. Tabs 103, 104 fit into slots 123, 124 in the lid 116 or the lid may include four projections with flared ends, one on each of the corners which simply "pop" through holes 108-111. 10 6 FIG. 7 12 3 11 4 11 6 1 113 114 130 107 FIG. 9
