TY - JOUR

T1 - A comparative study of development and demographic parameters of Tetranychus merganser and Tetranychus kanzawai (Acari: Tetranychidae) at different temperatures

AU - Ullah, M. S.

AU - Moriya, D.

AU - Badii, M.H.

AU - Nachman, Gøsta Støger

AU - Gotoh, T.

PY - 2011

Y1 - 2011

N2 - We investigated the effect of temperature on development and demographic parameters such as the intrinsic rate of natural increase (rm) of the two spider mite species Tetranychus merganser Boudreaux and T. kanzawai Kishida at eleven constant temperatures ranging from 15 to 40C at intervals of 2.5C. Both male and female T. merganser and T. kanzawai completed development from egg to adult at temperatures ranging from 15 to 37.5C. The longest developmental duration of immature stages was found at 15C and the shortest developmental duration was found at 35C for both species. Using linear and non-linear developmental rate models, the lower thermal thresholds for egg-to-adult (female and male) and egg-to-egg development were estimated as 12.2–12.3C for T. merganser and as 10.8C for T. kanzawai. The highest developmental rates were observed at around 35C, whereas the upper developmental thresholds were around 40C for both species. In fact, at 40C, a few eggs of either species hatched, but no larvae reached the next stage. The rm-values of T. merganser ranged from 0.072 (15C) to 0.411 day-1 (35C), whereas those of T. kanzawai ranged

AB - We investigated the effect of temperature on development and demographic parameters such as the intrinsic rate of natural increase (rm) of the two spider mite species Tetranychus merganser Boudreaux and T. kanzawai Kishida at eleven constant temperatures ranging from 15 to 40C at intervals of 2.5C. Both male and female T. merganser and T. kanzawai completed development from egg to adult at temperatures ranging from 15 to 37.5C. The longest developmental duration of immature stages was found at 15C and the shortest developmental duration was found at 35C for both species. Using linear and non-linear developmental rate models, the lower thermal thresholds for egg-to-adult (female and male) and egg-to-egg development were estimated as 12.2–12.3C for T. merganser and as 10.8C for T. kanzawai. The highest developmental rates were observed at around 35C, whereas the upper developmental thresholds were around 40C for both species. In fact, at 40C, a few eggs of either species hatched, but no larvae reached the next stage. The rm-values of T. merganser ranged from 0.072 (15C) to 0.411 day-1 (35C), whereas those of T. kanzawai ranged

KW - Faculty of Science

KW - Spidermites

KW - Life history

KW - Development

KW - REPRODUCTION

U2 - 10.1007/s10493-010-9420-6

DO - 10.1007/s10493-010-9420-6

M3 - Journal article

C2 - 21165678

VL - 54

SP - 1

EP - 19

JO - Experimental & Applied Acarology

JF - Experimental & Applied Acarology

SN - 0168-8162

IS - 1

ER -