One of the two treatments (blue or yellow trap)
was randomly allocated to each plot at random. At flowering, a wet
sticky yellow (Bugs for Bugs, Munduberra, Queensland) or blue trap
(Seabright Blue Thrips/Leaf miner traps, Seabright Enterprises,
Emeryville, CA) were hung in the host canopy 15 m apart and
1.5e2.0 m from the ground, and at least 25 m apart.