Abstract
The effect of temperature on thedevelopment of Rhyzobius lophanthae Blaisdell(Coleoptera: Coccinellidae) fed on Aspidiotusnerii Bouché (Homoptera: Diaspididae) undercontrolled laboratory conditions was studied. Theduration of each developmental stage and adultlongevity were measured at 15, 20, 25, and30 °C. The life cycle of R. lophanthae(from egg to oviposition) lasted 78.7, 43.6, 32.1, and 23.9 days, whereas theaverage adult longevity was 257.6, 171.4, 121.3, and88.5 days at each temperature, respectively. Lowtemperature thresholds of R. lophanthae immaturelife stages ranged from 7.6 to 9.3 °C, while thethermal constant for the development of R. lophanthaefrom egg to adult was 443.5 degree-days. The average fecundity at 25 °C was633.7 eggs per female. Rhyzobius lophanthaereared in cages outdoors during 1993–1995 at Kifissia,Athens developed 5 complete overlapping generationsper year from May to October and a 6th partialoverlapping generation during February and March.Adults of the 4th and 5th generation survived winterconditions giving rise to the following year's 1stgeneration. Females were reproductively activethroughout the year, indicating that R.lophanthae does not diapause.
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Stathas, G. The effect of temperature on the development of thepredator Rhyzobius lophanthae and its phenologyin Greece. BioControl 45, 439–451 (2000). https://doi.org/10.1023/A:1026576429008
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DOI: https://doi.org/10.1023/A:1026576429008