Table 2.
Population growth parameters of different P. xylostella strains.
| Biological characteristics | Fuzhou-S | Fuzhou-R2Ad | F1 | F1' | F value | P |
|---|---|---|---|---|---|---|
| Initial amount of eggs | 140 | 186 | 118 | 87 | ||
| Egg hatch (%) | 80.72 ± 1.22bB | 87.08 ± 0.36aA | 82.26 ± 0.57bAB | 74.57 ± 0.97cC | 36.82 | 0.0001 |
| Survival rate 1st instar (%) | 90.30 ± 0.5aA | 67.25 ± 0.59cC | 82.82 ± 0.89bB | 85.01 ± 1.27bAB | 127.19 | 0.0001 |
| Survival rate 2nd instar (%) | 57.80 ± 0.77cC | 58.71 ± 0.19cC | 97.57 ± 1.22aA | 85.74 ± 1.01bB | 498.22 | 0.0001 |
| Survival rate 3rd instar (%) | 93.23 ± 1.63bB | 100.00 ± 0.12aA | 96.30 ± 0.15abAB | 100.00 ± 1.03aA | 15.99 | 0.0010 |
| Survival rate 4th instar (%) | 91.00 ± 1.59aA | 74.90 ± 1.97cC | 84.22 ± 0.54bAB | 76.59 ± 1.05cBC | 28.22 | 0.0001 |
| Number of pupae | 17.00 ± 0.67abAB | 16.00 ± 1.00abAB | 21.00 ± 1.00aA | 12.00 ± 2.08bB | 8.02 | 0.0085 |
| Pupation rate (%) | 33.42 ± 1.62cC | 25.77 ± 1.02cC | 53.71 ± 1.47bB | 83.98 ± 2.46aA | 227.33 | 0.0001 |
| Adult number | 14 ± 0.67abAB | 12 ± 0.58bAB | 18.00 ± 1.00aA | 10 ± 1.53bB | 11.49 | 0.0029 |
| Emergence rate (%) | 86.11 ± 3.87aA | 75.18 ± 2.43aA | 86.42 ± 0.72aA | 83.99 ± 2.46aA | 4.06 | 0.0502 |
| Sexual ratio (female:male) | 1.17aA | 1.00aA | 1.31aA | 1.50aA | ||
| Fecundity/female | 102 ± 3.67abAB | 91 ± 5.29bAB | 129 ± 7.21aA | 82 ± 8.97bB | 9.65 | 0.0049 |
| Number of offspring eggs | 1414 | 546 | 1062 | 574 | — | — |
| R0 | 10.10 | 2.93 | 9.00 | 6.60 | — | — |
| Relative fitness | 1.00* | 0.29 | 0.89 | 0.65 |
According to one-way with post-hoc Tukey’s honestly significant difference, the same superscript letter following the numbers between rows of a given column indicates no significant difference between the strains at P > 0.05. The different upper and lower case letters stand for the significance with P < 0.01, and P < 0.05, respectively.
*Relative fitness of the susceptible Fuzhou-S strain is defined as 1.