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Temperature- and CO2-Dependent Life Table Parameters of Spodoptera litura (Noctuidae: Lepidoptera) on Sunflower and Prediction of Pest Scenarios

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Title Temperature- and CO2-Dependent Life Table Parameters of Spodoptera litura (Noctuidae: Lepidoptera) on Sunflower and Prediction of Pest Scenarios
Temperature- and CO2-Dependent Life Table Parameters of Spodoptera litura (Noctuidae: Lepidoptera) on Sunflower and Prediction of Pest Scenarios
 
Creator ICAR_CRIDA
 
Subject phytophagous insect, developmental time, insect pest, climate change, PRECIS
 
Description Not Available
Predicted increase in temperature and atmospheric CO2 concentration will influence the growth of crop plants and phytophagous insects. The present study, conducted at the Central Research Institute for Dryland Agriculture, Hyderabad, India, aimed at
(1) construction of life tables at six constant temperatures viz., 20, 25, 27, 30, 33, and 35 6 0.5C for Spodoptera litura (Fabricius)
(Noctuidae: Lepidoptera) reared on sunflower (Helianthus annus L.) grown under ambient and elevated CO2 (eCO2) (550 ppm) concentration in open top chambers and (2) prediction of the pest status in near future (NF) and distant future (DF) climate change scenarios
at major sunflower growing locations of India. Significantly lower leaf nitrogen, higher carbon and higher relative proportion of carbon
to nitrogen (C:N) were observed in sunflower foliage grown under eCO2 over ambient. Feeding trials conducted on sunflower foliage
obtained from two CO2 conditions showed that the developmental time of S. litura (Egg to adult) declined with increase in temperature
and was more evident at eCO2. Finite (k) and intrinsic rates of increase (rm), net reproductive rate (Ro), mean generation time, (T) and
doubling time (DT) of S. litura increased significantly with temperature up to 27–30C and declined with further increase in temperature. Reduction of ‘T’ was observed from maximum value of 58 d at 20C to minimum of 24.9 d at 35C. The DT of population was
higher (5.88 d) at 20C and lower (3.05 d) at 30C temperature of eCO2. The data on these life table parameters were plotted against
temperature and two nonlinear models were developed separately for each of the CO2 conditions for predicting the pest scenarios.
The NF and DF scenarios temperature data of four sunflower growing locations in India is based on PRECIS A1B emission scenario. It
was predicted that increased ‘rm’, ‘k’, and ‘Ro’ and reduced ‘T’ would occur during NF and DF scenario over present period at all locations. The present results indicate that temperature and CO2 are vital in influencing the population growth of S. litura and pest incidence may possibly be higher in the future
Not Available
 
Date 2022-01-27T04:38:08Z
2022-01-27T04:38:08Z
2014
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/68966
 
Language English
 
Relation Not Available;
 
Publisher M. Srinivasa Rao, C. A. Rama Rao, M. Vanaja, M Maheswari