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Table 4 Age-stage, two-sex life table parameters of H. hebetor on H. armigera reared on six tomato cultivars with four nitrogen levels

From: Tri-trophic interactions among nitrogen-fertilized tomato cultivars, the tomato fruit worm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) and the ectoparasitoid, Habrobracon hebetor (Say) (Hymenoptera: Braconidae)

N levelKingstonRiograndEarlyurbanaRedstonSuperstrain-BPrimoearly
R0 offspring/female/individualn011.04 ± 1.28Aa10.14 ± 1.24Aa9.960 ± 1.93Aa9.721 ± 1.13Aa10.36 ± 0.96Aa9.500 ± 1.94Aa
n-11.61 ± 1.56Aa10.92 ± 1.61Aa10.06 ± 1.92Aa10.09 ± 1.46Aa11.01 ± 1.44Aa10.48 ± 1.48Aa
ns12.14 ± 2.55Aa11.78 ± 1.90Aa10.32 ± 1.31Aa10.12 ± 1.55Aa11.16 ± 1.76Aa10.68 ± 1.53Aa
n+12.34 ± 2.83Aa12.16 ± 1.73Aa10.30 ± 1.41Aa10.21 ± 1.81Aa12.21 ± 1.83Aa11.80 ± 1.63Aa
r (day− 1)n00.1134 ± 0.01Ab0.1093 ± 0.01Ab0.1058 ± 0.014Aa0.1112 ± 0.065Aa0.1103 ± 0.006Ab0.1110 ± 0.014Ab
n-0.1438 ± 0.01Aa0.1366 ± 0.012Aa0.1186 ± 0.138Aa0.1263 ± 0.013Aa0.1390 ± 0.016Aa0.1331 ± 0.012Aa
ns0.1491 ± 0.01Aa0.1390 ± 0.011Aa0.1273 ± 0.012Aa0.1318 ± 0.128Aa0.1466 ± 0.013Aa0.1357 ± 0.012Aa
n+0.1515 ± 0.01Aa0.1450 ± 0.010Aa0.1352 ± 0.122Aa0.1374 ± 0.018Aa0.1487 ± 0.114Aa0.1411 ± 0.009Aa
T (day)n017.62 ± 0.20Aa17.86 ± 0.18Aa18.80 ± 0.25 Aa17.52 ± 0.01Aa17.38 ± 0.25 Aa17.84 ± 0.17Aa
n-17.10 ± 0.19Aa17.42 ± 0.17Aa18.24 ± 0.15 Aa17.41 ± 0.20Aa17.07 ± 0.16 Aa17.33 ± 0.32Aa
ns16.88 ± 0.4Aab17.51 ± 0.14Aa17.98 ± 0.18Aab17.61 ± 0.28Aa16.75 ± 0.15Aab17.32 ± 0.28Aa
n+16.47 ± 0.25Ab17.11 ± 0.18Aa17.86 ± 0.21 Ab17.56 ± 0.15Aa16.41 ± 0.11 Ab17.02 ± 0.28Aa
λ (day− 1)n01.1102 ± 0.01Ab1.1086 ± 0.017Ab1.1013 ± 0.015Aa1.1055 ± 0.017Ab1.1096 ± 0.015Ab1.1078 ± 0.016Ab
n-1.1378 ± 0.01Aa1.1322 ± 0.013Aa1.1195 ± 0.015Aa1.1222 ± 0.013Aa1.1410 ± 0.018Aa1.1265 ± 0.018Aa
ns1.1481 ± 0.02Aa1.1381 ± 0.012Aa1.1310 ± 0.014Aa1.1326 ± 0.014Aa1.1586 ± 0.015Aa1.1336 ± 0.011Aa
n+1.1603 ± 0.02Aa1.1582 ± 0.011Aa1.1344 ± 0.013Aa1.1415 ± 0.012Aa1.1608 ± 0.013Aa1.1543 ± 0.011Aa
  1. The SEs were estimated using 100,000 bootstraps resampling and compared by paired bootstrap test (comparison of 95% CI). Different capital letters in the rows and small letters in the columns refer to the significant differences (P ≤ 5%) R0 net reproductive rate, r intrinsic rate of increase, T mean generation time, λ: finite rate of increase