BUILDING FLIGHT INTERCEPTION TRAPS (FITs)
- by Nie Ruie

Materials

A transparent PVC plastic sheet (length×width=1.5 m×1.9 m), PCV container (length × width × height=1.5 m×1.9 m×0.1m), bamboo stick or plastic tube (2.5m), ropes, iron wire, waterproof glue. Tools: pliers, knife, a hole puncher, sickle etc.

Assembling

1. Prepare the PVC liquid container, e.g. using rain gutters. Firstly block both sides using end pieces, then put on waterproof glue waiting for about one hour or overnight. Container ends are tied to a fixed iron wire.
2. Prepare the screen. Firstly make around 10 holes along one side of the screen using a hole punch. The distance between two holes is around 30cm. Then the screen is tied to the bamboo stick using iron wire. Could also roll the screen around the bamboo and hold it place with transparent tape.
3. Fix the bamboo, screen and container. Three pairs of ropes are used, one to fix the bamboo and container, the second  is used to fix the bamboo to trees, and the third is used to fix the container to the ground (to prevent swaying).

The assembled FIT can be seen in the figure.

Storage solution

SDS+EDTA mixture (Pokluda et al 2014): final concentration 2% SDS and 0.1 mol/L EDTA (pH=8). For 1L mixture: 20 g SDS powder and, 37.2 g EDTA powder add water to fix the volume using NaOH fix pH=8.

Empty out the specimens with a sieve small enough to be able to move in the collecting container to scoop out of the preservation liquid.