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Table 1 Comparison of total numbers and sex ratio ratios of Phlebotomus orientalis sand flies captured by coloured sticky traps (STs) under different lunar light conditions and traps orientations in Belo Village (Gedarif state, Sudan; April–June 2016–2018)

From: Understanding sand fly sampling methods: sticky traps are attraction-based and not interceptive sampling tools of Phlebotomus orientalis

Trap colour na Total no. of sand flies No. of males No. of females Male:Femaleb
sex ratio
Experiment 1: Performance of vertical coloured STs under quarter-half-lunar light conditions
 Black 18 6 6 0 na
 Red 21 23 22 1 22:1
 Transparent 20 62 58 4 15:1
 White 22 182 174 8 22:1
 Yellow 22 166 155 11 15:1
 Total 103 439 415 24 17:1
Experiment 2: Performance of vertical STs traps under full lunar light conditions
 Black 8 5 3 2 2:1
 Blue 8 35 32 3 11:1
 Green 6 42 40 2 20:1
 Red 7 4 4 0 na
 Transparent 8 81 74 7 11:1
 White 8 414 408 6 68:1
 Yellow 5 21 18 3 6:1
 Total 50 602 579 23 25:1
Experiment 3: Performance of vertical coloured STs under dark night conditions
 Black 4 7 6 1 6:1
 Blue 4 27 25 2 13:1
 Green 4 56 46 10 5:1
 Red 4 13 11 2 6:1
 Transparent 4 77 63 14 5:1
 White 4 53 46 7 7:1
 Yellow 4 29 27 2 14:1
 Total 28 262 224 38 6:1
Experiment 4: Performance of horizontal coloured STs under dark night conditions
 Blue 8 8 6 2 3:1
 Green 8 2 1 1 na
 Red 8 7 5 2 3:1
 Transparent 8 16 11 5 2:1
 White 8 72 47 25 2:1
 Yellow 8 30 21 9 2:1
 Total 48 135 91 44 2:1
  1. an, number of replicates. Note that the number of replicates has a slight variation, due to missing data
  2. bna, no sex ratios were calculated due to presence of a zero record or too small number of males and females