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age-specific fecundity

International Journal of Tropical Insect Science (1)

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Effect of temperature on reproductive attributes of the Mexican beetle Zygogramma bicolorata (Coleoptera: Chrysomelidae)
Omkar, Shruti Rastogi, Pooja Pandey
Journal:

International Journal of Tropical Insect Science / Volume 29 / Issue 1 / March 2009

Published online by Cambridge University Press:

01 March 2009, pp. 48-52

Print publication:

March 2009
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The effect of different constant temperatures on several reproductive attributes of the Mexican beetle, Zygogramma bicolorata Pallister, was studied. Fecundity and egg viability, pre- and post-oviposition period, and age-specific fecundity were assessed at 20, 25, 27, 30 and 35 °C. Maximum fecundity and per cent egg viability were recorded at 27 °C (928 eggs and 75.6%, respectively). Pre-oviposition and post-oviposition period declined with increasing temperature up to 27 °C, then increased at temperatures beyond that. Oviposition period decreased from 92.9 to 27.5 days with temperature increment. Age-specific fecundity was also temperature dependent. Z. bicolorata is a biological control agent of the parthenium weed Parthenium hysterophorus Linnaeus, and these findings may be useful in mass rearing programmes for the natural enemy.