Life table parameters of an indigenous strain of Neoseiuluscalifornicus McGregor (Acari: Phytoseiidae) when fedTetranychus urticae Koch (Acari: Tetranychidae)
2017
Md. Nizam UDDIN, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Joydebpur, Bangladesh | Md. Zinnatul ALAM, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Joydebpur, Bangladesh | Md. Ramiz Uddin MIAH, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Joydebpur, Bangladesh | Md. Ismail Hossain MIAN, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Joydebpur, Bangladesh | Kishowar-E- MUSTARIN, , Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur, Bangladesh
The life table of the indigenous Neoseiulus californicus was studied at differenttemperatures and 65 ± 5% relative humidity under conditions of 16 h light : 8 h dark(LD 16:8). The total developmental period from egg to adult varied from 3.0 to14.0 days at 15 to 35 ℃. Survival to adulthood ranges from 86.21 to 93.94%, withthe highest rate at 25 ℃. The lower threshold temperature from egg to adult stagesof females and males was 10.84 and 10.72 ℃, respectively, and the thermal constantwas 57.14 degree-days (DD) for females and 56.18 DD for males. Total number ofeggs laid by each female was the highest (70.38 eggs) at 25 ℃, whereas average dailyfecundity was the highest (3.69 eggs/female/day) at 30 ℃. The net reproductive ratewas the highest (48.49) at 25 ℃ and lowest (26.18) at 30 ℃. Mean generation timedecreased from 19.04 to 11.47 days with increasing temperature from 20 to 30 ℃.Both intrinsic rate of natural increase (0.284) and finite rate of increase (1.32) weremaximum at 30°C. Adult longevity was the highest (42.75 days for females and32.60 days for males) at 20 ℃ and lowest (22.70 days for females and 15.30 daysfor males) at 30 ℃. Sex ratio was female biased and was the highest (78.08) at25 ℃ and lowest (70.24) at 30 ℃. Developmental data of five constant temperatures,temperature thresholds and thermal requirements may be used to predict theoccurrence, number of generations and population dynamics of N. californicus asan important biocontrol agent of Tetranychus urticae.
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