Temperature-dependent development and life table parameters of Typhlodromus bagdasarjani (Phytoseiidae) fed on two-spotted spider mite

Abstract

The predatory mite Typhlodromus bagdasarjani Wainstein and Arutunjan (Acari: Phytoseiidae) is an indigenous and widespread species of the Middle East fauna. In this paper we assess the effect of temperature on developmental rate and reproduction potential of T. bagdasarjani under laboratory conditions. The development of this species was determined at 15, 20, 25, 30, 35 and 37.5 ± 1°C, 60 ± 10% RH and L16:D8 h photoperiod. The total developmental time averaged 28.2, 15.0, 8.9, 7.6, 7.2 and 7.4 days at 15-37.5°C, respectively, when feeding on immature stages of two-spotted spider mite, Tetranychus urticae Koch. The lower developmental threshold (T ( 0 )) and thermal constant (K) for the development of this predator were estimated 9.2°C and 162 degree-days by the Ikemoto linear model. The life table parameters were estimated at 15-35°C. The shortest life span of females at 35°C was 45.0 days, followed by 50.7, 50.9, 103.3 and 136.8 days at 30, 25, 20 and 15°C, respectively. Mated females laid on average 19.9, 26.3, 41.1, 39.6 and 31.3 eggs per female at 15-35°C, respectively. The intrinsic rate of increase (r ( m )) and finite rate of increase (λ) increased significantly with increasing temperature. The r ( m ) values ranged from 0.021 (15°C) to 0.186 (35°C) days(-1). The highest value of net reproductive rate (R (0)) was 13.6 females progeny/female/generation at 25°C. The results demonstrated that T. bagdasarjani is well adapted to high temperatures. However, the efficiency to control spider mites may be affected by behavioral characteristics of the predator and its prey under real conditions.

Temperature-related development and population parameters for Typhlodromus pyri (Acari: Phytoseiidae) found in Oregon vineyards

“…These results are consistent with other life history parameters summarized for phytoseiid mites (Genini et al 1991;Gotoh et al 2004;Broufas et al 2007;Ganjisaffar et al 2011;Lee and Gillespie 2011). Duration of mite development in this study was similar to rates found for the European strain of T. pyri at temperatures from 20 to 30°C (Genini et al 1991).…”

“…It is possible that over-estimation of T. pyri developmental thresholds may have occurred because development was not observed at the lowest (12.5°C) or highest (35°C) temperatures assayed. The minimal threshold values were, however, within 3°C degrees of those reported for T. pyri and other related phytoseiid species (Genini et al 1991;Gotoh et al 2004 and references therein, Ganjisaffar et al 2011). In addition, the non-linear model used in this study provided the best fit to the current data as similarly reported by Ganjisaffar et al (2011) and Lee and Gillespie (2011).…”

“…The minimal threshold values were, however, within 3°C degrees of those reported for T. pyri and other related phytoseiid species (Genini et al 1991;Gotoh et al 2004 and references therein, Ganjisaffar et al 2011). In addition, the non-linear model used in this study provided the best fit to the current data as similarly reported by Ganjisaffar et al (2011) and Lee and Gillespie (2011). Further research, evaluating development over a greater range of constant temperatures or at fluctuating temperature regimes would aid in validating these estimations.…”

Temperature‐dependent development of Neoseiulus barkeri (Acari: Phytoseiidae) on Tetranychus urticae (Acari: Tetranychidae) at seven constant temperatures

“…Our results showed that high temperature (37°C) caused a decrease in developmental rate from a linear trend; therefore, for predicting the developmental rate and estimating the suitable values of the critical thresholds ( T min , T opt and T max ) of N. barkeri at a temperature range of 15 to 37°C, application of nonlinear models is necessary. Similar results were also reported for other predatory mites (Broufas & Koveos, 2001; Broufas et al ., 2007; Ganjisaffar et al ., 2011).…”

“…Assuming that development is a linear function of the temperature range of 15–35°C, the lower temperature threshold (12.07°C) and thermal constant (86.20 DD) were estimated by the linear model for total development of N. barkeri , in which this thermal constant is close to that reported for Amblyseius californicus McGregor (90.0 DD) (Castagnoli & Simoni, 1999), Euseius finlandicus (Oudemans) (93.45 DD) (Broufas & Koveos, 2001) and Amblyseius longispinosus (Evans) (80.5 DD) (Nakagawa, 1984). The obtained thermal constant is lower than that reported for Phytoseius plumifer (Canestrini and Fanzago) (125.3 DD) (Kouhjani‐Gorji et al ., 2008) and Typhlodromus bagdasarjani Wainstein and Arutunjan (162 DD) (Ganjisaffar et al ., 2011). Conversely, this thermal constant for N. barkeri is higher than that reported for Phytoseiulus longipes Evans (28.7 DD) (Ferrero et al ., 2007) and A. californicus (59.2 DD) (Gotoh et al ., 2004).…”