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Table 1 Morphometrics of all generations of Steinernema abbasi CS38. All measurements are in μm (except n, ratio and percentage) and in ± SD (range)

From: Morpho-taxometrical and molecular characterization of Steinernema abbasi (Nematoda: Steinernematidae) and its pathogenicity and generative potential against lepidopteran pests

Characters Male Female Infective juveniles
First generation Second generation First generation Second generation
n 15 15 15 15 20
Body length (L) 1270 ± 111 (1082–1441) 883 ± 69 (761–1006) 5041 ± 792 (3731–6314) 1631 ± 237 (1287–2071) 581 ± 20 (520–610)
Excretory pore (EP) 72 ± 8.6 (57–83) 62 ± 3.5 (54–68) 80 ± 7.6 (70–96) 55 ± 4.0 (46–60) 46 ± 3.3 (39–53)
Width EP (WEP) 51 ± 6.4 (41–62) 30 ± 1.2 (29–33) 81 ± 6.4 (70–88) 43 ± 4.9(34–52) 18 ± 1.0 (16–20)
Nerve ring (NR) 91 ± 8.3(81–114) 72 ± 5.1 (63–85) 102 ± 10 (92–127) 75 ± 3.2 (71–81) 57 ± 6.4 (42–67)
Pharynx length (ES) 138 ± 9.1 (121–162) 118 ± 5.9 (107–126) 169 ± 8.0 (159–190) 134 ± 4.5 (125–140) 88 ± 7.3 (69–98)
Esophageal bulb length 29 ± 3.3(23–35) 25 ± 2.5(20–31) 43 ± 4.4(35–54) 31 ± 3.5(26–39) 16 ± 1.4 (14–19)
Esophageal bulb width 24 ± 1.8 (20–27) 21 ± 1.7 (19–25) 33 ± 2.9 (28–38) 26 ± 1.9 (23–30) 11 ± 1.4 (8–13)
Tail (T) 22 ± 2.7 (16–27) 18 ± 1.4 (15–20) 47 ± 11 (29–72) 44 ± 8.2(26–56) 55 ± 4.9 (42–63)
Anal body width (ABW) 35 ± 3.4 (29–41) 28 ± 1.5 (26–30) 67 ± 16 (41–95) 35 ± 5.8 (28–48) 14 ± 1.3 (12–17)
Body dia. (BD) 135 ± 14 (101–156) 60 ± 5.2 (54–73) 205 ± 20 (169–239) 95 ± 19 (69–130) 26 ± 1.6 (22–30)
Testis reflection (TR) 241 ± 26 (186–282) 74 ± 6.3 (63–84)    
Spicule length (SL) 72 ± 4.5 (62–80) 53 ± 7.7 (33–63)    
Gubernaculum length (GL) 46 ± 2.8 (42–50) 37 ± 2.6 (30–40)    
Anterior to vulva    2676 ± 428 (2136–3299) 891 ± 124 (710–1080)  
Posterior to vulva    2386 ± 413 (1571–3015) 740 ± 128 (540–996)  
Width at vulva (WV)    194 ± 24 (161–229) 102 ± 19 (72–136)  
a = L/GBW 9.5 ± 1.1(7.5–11) 15 ± 1.6 (12–17) 25 ± 5.6 (17–37) 17 ± 1.4 (15–19) 23 ± 1.7 (20–25)
b = L/ES 9.2 ± 0.8 (8.1–11) 7.5 ± 0.6 (6.2–8.6) 30 ± 4.2 (22–37) 12 ± 1.6 (10–16) 6.7 ± 0.4 (6.0–7.5)
c = L/Tail 58 ± 10 (46–83) 50 ± 3.4 (43–54) 113 ± 29 (55–173) 38 ± 6.9 (27–50) 11 ± 1.1 (9.2–13.6)
c' = Tail/ABW 0.6 ± 0.1 (0.5–0.7) 0.6 ± 0.0(0.5–0.7) 0.7 ± 0.1 (0.5–0.9) 1.3 ± 0.3 (0.9–1.8) 3.8 ± 0.4 (3.2–4.8)
D% = EP/ES × 100 52 ± 4.9 (44–60) 53 ± 2.1 (48–56) 47 ± 3.6 (42–55) 41 ± 3.0 (34–46) 53 ± 3.7 (45–58)
E% = EP/Tail×100 325 ± 42 (248–403) 350 ± 36 (294–438) 180 ± 42 (97–237) 129 ± 29 (89–201) 85 ± 8.7 (70–102)
F% = GBW/Tail×100 619 ± 111 (427–875) 338 ± 39 (285–409) 457 ± 103(321–677) 218 ± 45 (154–305) 47 ± 5.5 (36–64)
V = V'/L × 100    53 ± 2.7 (47–58) 55 ± 2.6 (50–59)  
SW% 210 ± 25 (159–245) 191 ± 26 (114–220)    
GS% 65 ± 6.3 (58–80) 70 ± 9.2 (57–91)    
EP/WEP 1.4 ± 0.2 (0.9–1.7) 2.1 ± 0.1 (1.8–2.3) 1.0 ± 0.1 (0.8–1.2) 1.3 ± 0.2 (1.1–1.6) 2.5 ± 0.2 (2.1–3.0)
EBL/EBW 1.2 ± 0.1 (1.1–1.4) 1.2 ± 0.1 (1.0–1.3) 1.3 ± 0.1 (1.1–1.5) 1.2 ± 0.1 (1.0–1.4) 1.6 ± 0.2 (1.1–2.1)