Journal of Insect Science (2008) 8 (7), 1-9

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J. Legaspi, B.C. Legaspi, A.M. Simmons and M. Soumare (2008)
Life table analysis for immatures and female adults of the predatory beetle, Delphastus catalinae, feeding on whiteflies under three constant temperatures
Journal of Insect Science 8 (7), 1-9
Abstract: Immature development and reproductive life history of Delphastus catalinae (Horn) (Coleoptera: Coccinellidae) feeding on Bemisia tabaci biotype B (Gennadius) (Homoptera: Aleyrodidae) (= B. argentifolii Bellows and Perring) immatures was studied at three constant temperatures: 22, 26 and 30 ºC. Lower developmental threshold temperatures (T0) were estimated at 9 and 9.9 ºC, for males and females, respectively. Female adults weighed slightly more than males (0.587 and 0.505 mg, respectively). As temperature increased from 22 to 30 ºC, developmental time from eggs to eclosion of the adult declined from 24 to 15 days. Thermal units required for immature development was ~300 degree-days. Percentage egg hatch declined at increasing temperatures, but no significant effect of time was found. The intrinsic rate of increase, r, increased from 0.048 to 0.082 and doubling time decreased from 14.44 to 8.45 days as temperature increased from 22 to 26 ºC. Mean daily fecundity was modeled as a function of time and temperature to create a 3-dimensional surface. Overall, Delphastus catalinae was found to perform better at 22 and 26 ºC while 30 ºC was detrimental to immature development and adult reproduction.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jesusa Crisostomo Legaspi, Alvin M. Simmons

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Bemisia tabaci biotype MEAM1
Delphastus catalinae (predator) Bemisia tabaci biotype MEAM1