WS/T 692-2020Vector density monitoring method (English PDF)

3.1 Visual inspection

3.1.1 Appliances

Flashlight, magnifying glass, tweezers, dissecting needle, ziplock bag.

3.1.2 Operation method

In the monitoring room, select places where bed bugs inhabit, such as bed boards, mattresses (including holes, holes, and seams on them), bed frames, bed heads, Drawers and other gaps and furniture joints, sofas, and furniture and pores around sofas and beds. Illuminate with a flashlight, use a magnifying glass, tweezers, Dissecting needles and other tools, using direct visual inspection, tapping and other inspection methods to check and record the number of bed bugs caught in each place and the bed bugs found trace. A single room with an inspection area less than 15 m2 is counted as one room, and a room larger than 15 m2 is counted as one room with 15 m2.Monitoring record table see

Table A.1 in Appendix A.

3.1.3 Presentation of results

3.1.3.1 Adult nymph density calculation

3.1.3.1.1 Infringement rate

Calculate the bed bug infestation rate according to formula (1).

3.1.3.1.2 Density

Calculate the bed bug density according to formula (2).

3.1.3.1.3 Density index

Calculate the bed bug density index according to formula (3).

3.1.3.2 Bed bug trace density calculation

Calculate the positive rate of bed bug traces according to formula (4).

3.2 Sticky trap method

3.2.1 Appliances

Sticky Worm (cockroach) paper. The glue surface specification is 170 mm×100 mm.

3.2.2 Operation steps

During the monitoring period, there should be people living normally in the monitoring room, and the bed bug stickers should be placed in places where bed bugs often inhabit and move, such as beds, Around sofas, furniture, etc., the bed and sofa should be placed on the four corners that are in contact with the ground, and the number of sticky papers in each room According to the specific choice of the furniture in the room. Leave the bed bug sticker for 7 days. Record the species and number of bed bugs caught, see Table A.2.for the monitoring record form.

3.2.3 Presentation of results

According to formula (5), formula (6), formula (7) and formula (8), respectively calculate the sticking catch rate, infringement rate, density and density index.

Appendix A

(Informative appendix) Monitoring record sheet Tables A.1 to A.2 give the record sheets suitable for bed bug density monitoring.

Table A.1 Density monitoring record table (visual method)