Citas bibligráficas
Casana, N., (2015). Biología de Delphastus quinculus (Gordon 1994) (Coleoptera : Coccinellidae) bajo diferentes temperaturas [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/942
Casana, N., Biología de Delphastus quinculus (Gordon 1994) (Coleoptera : Coccinellidae) bajo diferentes temperaturas [Tesis]. : Universidad Nacional Agraria La Molina; 2015. https://hdl.handle.net/20.500.12996/942
@mastersthesis{renati/1113752,
title = "Biología de Delphastus quinculus (Gordon 1994) (Coleoptera : Coccinellidae) bajo diferentes temperaturas",
author = "Casana Amoretti, Nina",
publisher = "Universidad Nacional Agraria La Molina",
year = "2015"
}
Delphastus quinculus (Gordon, 1994) is a predator that has been reported as important to control the complex of the Greenhouse Whitefly Trialeurodes vaporariorum. In order to obtain certain information on some aspects of their biology and the effect of temperature on development, experiments under laboratory conditions were undertaken at six constant temperatures 15, 18, 20, 25, 28 and 32 °C; with a common photoperiod of 12 L : 12 D. Life cycle, reproduction and population parameters were evaluated. Development time and development rate of each the immature stages, from oviposition to adult emergence, tend to decrease with increasing temperature from 18 to 32 ºC, at 15 ºC no development was obtained from any developmental stage.Temperature affects the development rate of the immature stages of Delphastus quinculus, being the first larval stage the most susceptible to changes in temperature and the least susceptible was the pupal stage, being necessary to predict whether this property will influence its establishment in an area, due to its thermal conditions. For longevity it was observed that increasing the temperature to 18 ºC, 20 ºC and 32 ºC, decreased the longevity of insects, however when the temperature increased to 25 ºC and 28 ºC the longevity of insects increased, this indicates that those are favorable temperatures for the insects. For longevity according to sex at 18 ºC showed that males live longer than females, at 20 °C were similar, but with increasing of temperature to 25, 28 and 32 ºC, male longevity decreased; female longevity was longer than the males. The maximum fertility reached at 28 °C (79.8 eggs / female) and the lowest at 32 °C with 3.54 eggs. The sex proportion reaches equilibrium of 0.9: 1 at 25 °C, by favoring the highest temperature to the females.The rate of oviposition has two peaks in the first third of their life to 25 ºC and 28 ºC, being very irregular for the other temperatures studied. Four larval stages were differentiated. The insect acted as a predator. Reproduction is sexual. Life tables obtained allow us to develop phenological models based on temperature by using the ILCYM software and so be able to predict and understand the population dynamics and to determine the optimum temperature for growth and development of D. quinculus.
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