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Influence of Constant Temperatures on the Development, And Reproductive Potential of the Ladybird Beetle, Coccinella Undecimpunctata L. (Coleoptera: Coccinellidae)
- Mohamed A. A. Abdel-Rahman
- Plant Protection Research Institute, Agricultural Research center, Egypt
- The Third International Conference onIPM Role in Integrated Crop management and Impacts on Environment and Agricultural Products. 26-29 November 2005, Giza, Egypt.
Abstract
Development and reproductive potential of the ladybird beetle, Coccinella undecimpunctata L. feed on cereal aphids as preys were studied at constant temperatures of 20, 25 and 30 ?C. Temperatures of 25?C and 30?C were found to be the most favorable temperatures for the development and multiplication of this predator. Threshold temperatures (t0) of 10.62, 12.25, and 8.61?C were calculated for the egg, larval and pupal stages, respectively. Based on these thresholds the stages respectively needed about 40.69, 114.09 and 107.21 day-degrees to complete their development. Thermal units required to develop one generation of this predator was about 256.58 day-degrees using 11.02 ?C as a base temperature. Net reproductive rate (R0), mean generation time (GT), population-doubling time (DT), intrinsic (rm) and finite (?) rates of increase of the predator were also calculated and discussed.
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The Arab Scientists in Cooperation with The High Institute of Marine Research. Publish all the researches abstracts, which presented in The Regional Workshop on Marine Sciences and Natural Resources, Tishreen University, Lattakia, Syria, 25-26 May 2004.
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Current Status of Plant Protection in Yemen and Future Strategy.
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Middle-East Academy for Medicine of Ageing
First Annual Middle-East Age & Aging Meeting
8-11 April, 2004
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Arab Society for Plant Protection (ASPP) in Cooperation with The Arab Scientists
Publish all the researches abstracts, which presented in the Eighth Arab Congress of
Plant Protection, held in Faculty of Agriculture, Omar Al-Mukhtar University, El-beida
City, Libya, October 12-16,2003
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