Browsing by Author "Satishchandra, Nitin Kanle"

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Population Growth Potential of Tuta Absoluta (Meyrick) (Lepidoptera: Gelechiidae) on Tomato, Potato, and Eggplant
(Wiley, 2019) Satishchandra, Nitin Kanle; Chakravarthy, Akshay Kumar; Ozgokce, Mehmet Salih; Atlihan, Remzi
The influence of host plant on population dynamics of an invasive pest, Tuta absoluta was studied on three economically important solanaceous crops. Experiments were conducted in laboratory (29 +/- 0.5 degrees C, 75 +/- 5% RH and a photoperiod of 14:10 hr [L:D]) using tomato (Solanum lycopersicum L.), potato (Solanum tuberosum L.) and eggplant (Solanum melongena L.). Results indicated that intrinsic rate of increase (r), finite rate of increase (lambda) and net reproductive rate (R-0) were higher, and mean generation time (T) was the shortest on tomato. Results suggested that T. absoluta developed on all the three plants, and tomato plant was most preferred one. Results suggested that T. absoluta has a potential to become a serious pest on potato and even on eggplant under favourable conditions. We used the life tables of 0.025th and 0.975th percentiles of bootstraps to project the uncertainty of population growth, a new concept.
Effect of Temperature and Co2 on Population Growth of South American Tomato Moth, Tuta Absoluta (Meyrick) (Lepidoptera: Gelechiidae) on Tomato
(Oxford Univ Press inc, 2018) Satishchandra, Nitin Kanle; Vaddi, Sridhar; Naik, Sangya Onkara; Chakravarthy, Akshay Kumar; Atlihan, Remzi
The effects of different temperatures (26, 28, 30, and 32 degrees C) and CO2 concentrations (380 and 550 ppm) on the life table of Tuta absoluta were evaluated. The life history raw data of T. absoluta were analyzed by using the age-stage, two-sex life table. Results showed that increase in temperature reduced the larval developmental time of T. absoluta, whereas the elevated CO2 concentration (eCO(2)) extended the larval developmental time. Highest fecundity rate was recorded at 30 degrees C at ambient CO2 (aCO(2)) condition (88.10 eggs). Total fecundity significantly reduced under eCO(2) at 28 degrees C and 30 degrees C. There was a 5-10% higher mortality observed under eCO(2) than aCO(2) condition. With rise in temperature from 26-30 degrees C, T. absoluta reared under eCO(2) condition showed lower net reproductive rate, intrinsic and finite rate of increase in comparison to aCO(2). However, these parameters started decreasing at 32 degrees C under both eCO(2) and aCO(2) conditions.