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Host plant (Ricinus communis Linn.) mediated effects of elevated CO2 on growth performance of two insect folivores

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Title Host plant (Ricinus communis Linn.) mediated effects of elevated CO2 on growth performance of two insect folivores
Host plant (Ricinus communis Linn.) mediated effects of elevated CO2 on growth performance of two insect folivores
 
Creator ICAR_CRIDA
 
Subject Achaea janata, biochemical analysis, castor, consumption, elevated CO2, insect performance indices, Spodoptera litura.
 
Description Not Available
Elevated atmospheric CO2 expected in the near future
as a consequence of increasing emissions will alter the
quantity and quality of plant foliage, which in turn
can influence the growth and development of insect
herbivores. Feeding trials with two foliage feeding
insect species, Achaea janata and Spodoptera litura
were conducted using foliage of castor plants grown
under four concentrations of CO2, viz. 700 ppm CO2
inside open top chamber (OTC), 550 ppm CO2 inside
OTC, ambient CO2 (350 ppm) inside OTC and ambient CO2 in the open. Biochemical analysis of foliage
revealed that plants grown under elevated CO2 had
lower N, and higher C, C/N ratio and polyphenols.
Compared to the larvae fed on ambient CO2 foliage,
the larvae fed on 700 and 550 ppm CO2 foliage exhibited greater consumption. Larval duration also
increased by two days. The 700 and 550 ppm CO2 foliage was more digestible with higher values of approximate digestibility. The relative consumption rate of
larvae increased whereas the efficiency parameters,
viz. efficiency of conversion of ingested food (ECI),
efficiency of conversion of digested food (ECD), and
relative growth rate (RGR) decreased in case of larvae
grown on 700 and 550 ppm CO2 foliage. The consumption and weight gain of the larvae were negatively and
significantly influenced by leaf nitrogen, which was
found to be the most important factor affecting consumption and growth of larvae.
Not Available
 
Date 2020-02-25T08:39:24Z
2020-02-25T08:39:24Z
2009
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32799
 
Language English
 
Relation Not Available;
 
Publisher M. Srinivasa Rao, K. Srinivas, M. Vanaja,, B. Venkateswarlu