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Fatemeh Seyfollahi,Mehdi Esfandiari,Mohammad Saeed Mossadegh,Arash Rasekh 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.3
Hyperaspis polita Weise (Coleoptera: Coccinellidae) is one of the most important predators of the cotton mealybug, Phenacoccus solenopsis Tinsley (Sternorrhyncha: Coccoidea: Pseudococcidae), in southern Iran. The development, survivorship, longevity, reproduction, and life table parameters of this predator were evaluated at 25, 30, and 35 ± 1 °C, 65 ± 5% RH and a photoperiod of 14 L:10 D. The duration of total pre-adult stage in males and females decreased from 32.63 and 30.06 at 25 °C to 19.96 and 19.37 days at 35 °C, respectively. The oviposition period of females was significantly affected by temperature that was, 47.73, 68.66 and 27.65 days with average egg production of 207.37, 505.50, and 151.03 at 25, 30, and 35 °C, respectively. According to the age-stage, two-sex life table, the highest values of the intrinsic rate of increase rm were obtained at 30 (0.112 d−1) and 35 °C (0.120 d−1) with no significant difference. The finite rate of increase (λ) was the highest at 30 (1.130 d−1) and 35 °C (1.146 d−1) with no significant difference. The net reproductive rate was the highest at 30 °C (R0 = 204.240 offspring) and the mean generation time was shortest at 35 °C (T = 29.87 d). The results indicate that suitable temperature for population development and fecundity of H. polita is around 30 °C, which could be a result of adaptation of this coccinellid predator to the warm climate of southwestern Iran.
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