Alfalfa responses to drought, salinity, and herbivory by Tetranychus urticae (Acari: Tetranychidae) and performance of the pest on water-stressed plants Author Khodayari, Samira . Department of Plant Protection, Faculty of Agriculture, University of Maragheh, P. O. Box: 55181 - 83111, Maragheh, Iran; E-mail: khodayari @ maragheh. ac. ir khodayari@maragheh.ac.ir Author Abedini, Fatemeh . Department of Horticultural Sciences, Faculty of Agriculture, University of Maragheh, P. O. Box: 55181 - 83111, Maragheh, Iran; E-mail: abedini _ 5883 @ yahoo. com abedini_5883@yahoo.com text Persian Journal of Acarology 2022 2022-10-15 11 4 695 711 journal article 10.22073/pja.v11i4.75896 2251-8169 7447461
Table 6. Population growth parameters (r, intrinsic rate of increase, λ, finite rate of increase, R 0, net reproductive rate, T, mean generation time and GRR, gross reproductive rate) of specimens of Tetranychus urticae grown on leaves collected from alfalfa plants treated with drought and salinity stresses.
Host statusr (day- 1 )λ (day- 1 )R 0 (offspring/ individual)T (d)GRR
The standard errors were calculated using the bootstrap procedure with 100000 bootstraps. Within each column, means (± SE) followed by the same letter are not significantly different (Paired bootstrap test, P> 0.05)
Control0.1971 ± 0.0118a1.2180 ± 0.0143a25.66 ± 4.48a16.38 ± 0.29a31.73 ± 5.96a
50% FC0.1243 ± 0.0178b1.1325 ± 0.0201b6.83 ± 1.77b15.16 ± 0.30b19.64 ± 4.25a
25% FC−0.0116 ± 0.0227cd0.9887 ± 0.0223cd0.9 ± 0.23cd11.91 ± 0.56d2.42 ± 0.6c
100 mM NaCl0.0236 ± 0.0129c1.0239 ± 0.0132c1.46 ± 0.28c15.38 ± 0.72abc10.26 ± 0.6b
200 mM NaCl-0.0219 ± 0.0205cd0.9786 ± 0.0199cd0.73 ± 0.23d16.93 ± 0.31a4.45 ± 1.24c
300 mM NaCl-0.0514 ± 0.0229d0.9502 ± 0.0216d0.5 ± 0.15d14.47 ± 0.08c2.84 ± 0.7c