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Table 2 Morphometrics of Steinernema affine M.22.

From: First report of entomopathogenic nematode Steinernema affine (Nematoda: Steinernematidae) in Syria and its virulence against Galleria mellonella L. (Lepidoptera: Pyralidae)

Character Infective juveniles (IJs) First generation Second generation
Male Female Male Female
n 20 20 20 20 20
L 759.8 ± 47.6 (655–835) 1539 ± 98.2 (1373–1773) 4941 ± 390 (3567–5500) 1397.5 ± 152 (1178–1645) 1691 ± 85 (1451–1845)
MBD 32.2 ± 1.9 (29–34) 106 ± 14 (75–141) 272.8 ± 10.5 (264–285) 76.1 ± 6.6 (70–89) 80.5 ± 5 (72–88)
EP 67.76 ± 3.3 (62 -72) 108.5 ± 5.9 (95–122) 145.8 ± 11.1 (135–168) 110.7 ± 6.2 (100–119) 106 ± 2.6 (103–111)
NR 95 ± 6 (87–107) 124.8 ± 7.4 (114–144) 170.6 ± 10.4 (156–191) 131.2 ± 7.3 (126–1147) 135.2 ± 12.2 (120–140)
ES 118.3 ± 6 (110–132) 170.43 ± 6.1 (160–178) 238.7 ± 14 (242–278) 175.7 ± 6.2 (162–184) 185.8 ± 3.7 (179–190)
ABW 19.3 ± 1.0 (18–21) 60.1 ± 5.3 (53–70) 90.5 ± 7.1 (78–100) 46.3 ± 4.2 (40–49) 48.7 ± 7.7 (42–58)
T 65.1 ± 4.8 (59–69) 51.1 ± 4.8 (42–57) 57.6 ± 4.4 (53–66) 46 ± 2.8 (39–50) 64 ± 3 (58–69)
a 23.6 ± 1.4 (22–26.1) 14.8 ± 2.4 (11.33–19.5) 18.1 ± 2.7 (13.2 − 21.5) 18.4 ± 2.4 (15.2–23) 20.8 ± 2.6 (16.8–24)
b 6.4 ± 0.5 (5.1–7.4) 9 ± 0.6 (7.7–10.3) 20.7 ± 2.8 (14.2 − 23.7) 7.9 ± 0.8 (6.9–9.7) 9 ± 1.3 (7.2–11.1)
c 11.7 ± 1.2 (10.2 − 13.3) 30.3 ± 3.3 (26.6–36.6) 85.8 ± 10.2 (61.5–98.8) 29.4 ± 2.6 (24–32.6) 26.4 ± 4.8 (20.6–33.8)
D% 57.4 ± 3.9 (48.4–62.7) 63.5 ± 2.1 (56.3–68) 61 ± 3 (54.6–62.8) 63 ± 4.1 (55.5–70) 57.2 ± 1.6 (55.7–60.6)
E% 104 ± 10.4 (93.7–106.5) 214 ± 4.6 (182–271) 253 ± 18.6 (204–287) 236.5 ± 21.3 (208–264.4) 166.4 ± 8.1 (155–179.3)
TR 513 ± 13 (483–519)   210 (188–290)
Spicule Length 69 ± 6.9 (60–80) 67.5 ± 4.4 (60–74)
Spicule width 13.3 ± 1.4 (9–15) 10.5 ± 1 (9–12)
GL 45.1 ± 6.6 (33–54) 39.3 ± 4.3 (31–42)
GW 8.8 ± 0.6 (8–10) 8 ± 0.6 (7.1–9.8)
SW% 115.2 ± 10.9 (92–123.3) 146 ± 6.2 (109–168)
GS% 65.8 ± 11.1 (55–90) 58.3 ± 8.1 (48—68)
  1. All measurements are in micrometers (except n, ratio, and percentage). Data are expressed as mean ± SD (range)