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Fig. 2. Experimental design for adhesion force measurements of single droplets of
the adhesive secretion in tentacle-shaped trichomes. The living or dead test
insect (TI), with its dorsal side attached to a glass slide (GS) with a
droplet of beeswax (WD), is mounted on a horizontal holder (HO). A
tentacle-shaped glandular trichome (GT) with a distinct terminal droplet of
adhesive secretion is attached to a piece of double-sided carbon tape (DC)
adhering firmly to a force sensor (FS). The sensor with the trichome was moved
down using a motorized micromanipulator until contact between the droplet and
the test surface (insect, glass) occurred at a load of approximately 50 µN,
and then the sensor with the trichome was pulled up. The time–force
sensor signal was recorded and processed further in a computer (PC).
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