Table 1 Comparative morphometric of all generations of the present isolate Steinernema abbasi CS39. All measurements are in micrometers (µm)
Characters No. (µm) | Male (♂) | Female (♀) | Infective juveniles | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
First generation | Second generation | First generation | Second generation | |||||||
CS-39 | S.abbasi | CS-39 | S. abbasi | CS-39 | S. abbasi | CS-39 | S. abbasi | CS-39 | S. abbasi | |
Total body length (L) | 1027 | 1252 | 900 | 861 | 3820 | 3510 | 1143 | 2609 | 496 | 541 |
(825–1241) | (999–1534) | (762–1390) | (606–1035) | (1033–9324) | (2453–4477) | (685–1586) | (1897–3917) | (344–552) | (496–579) | |
Maximum body width (MBW) | 70 | 87 | 80 | 70 | 156 | 159 | 70 | 130 | 30 | 29 |
(57–89) | (82–98) | (40–151) | (64–80) | (81–318) | (143–181) | (59–86) | (123–148) | (25–33) | (27–30) | |
Excretory pore (EP) | 70 | 80 | 58 | 66 | 72 | 71 | 41 | 66 | 39 | 48 |
(59–89) | (68–89) | (29–92) | (62–79) | (34–112) | (62–79) | (30–67) | (61–73) | (23–53) | (46–51) | |
Nerve ring (NR) | 79 | 103 | 67 | 99 | 108 | 125 | 76 | 114 | 59 | 68 |
(62–95) | (99–123) | (29–109) | (93–106) | (89–189) | (120–137) | (55–110) | (110–118) | (47–70) | (64–72) | |
Pharynx length (ES) | 102 | 133 | 118 | 121 | 160 | 165 | 122 | 146 | 94 | 89 |
(74–111) | (121–144) | (100–140) | (112–130) | (127–245) | (155–176) | (93–151) | (136–157) | (73–120) | (85–92) | |
Tail | 23 | 26 | 22 | 21 | 47 | 37 | 35 | 36 | 50 | 56 |
(20–28) | (20–31) | (18–28) | (17–24) | (24–143) | (31–40) | (21–50) | (32–39) | (33–63) | (52–61) | |
Spicule length (SPL) | 64 | 65 | 60 | 61 | – | – | – | – | – | – |
(52–73) | (57–74) | (43–73) | (51–69) | |||||||
Gubernaculum length (GL) | 42 | 45 | 42 | 43 | – | – | – | – | – | – |
(37–46) | (33–50) | (24–59) | (35–48) | |||||||
a = L/MBW | 15 | – | 14 | – | 22 | – | 16 | – | 17 | 18 |
(13–17) | (9–20) | (7.4–45) | (8.7–20) | (14–19) | (17–20) | |||||
a = L/MBW | 10 | – | 9 | – | 22 | – | 9.41 | – | 5.3 | 6 |
(8.6–13) | (6–13) | (7.4–47) | (7.4–12) | (4.5–6.7) | (5.5–6.6) | |||||
c = L/Tail | 45 | – | 47 | – | 88 | – | 34 | – | 10.1 | 9.8 |
(37–57) | (37–67) | (26–274) | (24–61) | (7.8–12.9) | (8.1–10) | |||||
D% = EP/ES × 100 | 69 | 60 | 50 | 56 | 45 | 42 | 34 | 45 | 43 | 53 |
(60–96) | (51–68) | (22–69) | (50–70) | (24–64) | (36–48) | (23–48) | (43–47) | (20–57) | (51–58) | |
E% = EP/T × 100 | 307 | – | 264 | – | 183 (70–379) | – | 123 | – | 81 | – |
(261–447) | (158–402) | (71–185) | (37–123) | |||||||
SW% = SPL/ABWX100 | 66 | 156 | 147 | 159 | – | – | – | – | – | – |
(57–72) | (107–187) | (64–187) | (128–185) | |||||||
GS% = GL/SLX100 | 8.4 | 70 | 66 | 70 | – | – | – | – | – | – |
(6.4–10) | (58–85) | (7.5–96) | (58–81) | |||||||
Mucron | Absent | Present | Absent | Present | ||||||