Life table and population parameters of Paracoccus marginatus at varying temperatures on cotton
Abstract views: 27 / PDF downloads: 0
Keywords:Paracoccus marginatus, life table, population parameters, temperature
The effect of temperature on the life history traits of Paracoccus marginatus was carried out at 20, 25 and 30Â°C on cotton. The data revealed that P. marginatus took maximum of 41.3 days to complete one generation at 20Â°C followed by 28.5 and 26.5 days at 25Â°C and 30Â°C, respectively. Adult longevity was higher at 20Â°C, but declined at 25 and 30Â°C. Doubling time was lowest at 30Â°C (3.55 days) and higher at 20 and 25oC (9.06 and 4.19 days, respectively). Generation time decreased as temperature increased towards an optimal temperature. As temperature increased, survivorship (lx) declined more quickly, but fecundity (mx) peaked earlier. At 30Â°C, the net fecundity was highest resulting in the highest intrinsic rate of increase. The results indicated that ability of P. marginatus to develop, survive and reproduce successfully between 20 and 30oC suggests that it can establish in areas within this temperature range.
Manuscript will be accepted on the understanding that their content is original and that permission has been received in writing wherever necessary to produce previously published material (including quotations, data and illustrations) and that the manuscript has not been submitted/ accepted for publication elsewhere. Copyright resides with the Plant Protection Association of India.