Florida Entomologist (2008) 91, 491-493

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D. Gandolfo, J.C. Medal and J.P. Cuda (2008)
Effects of temperature on the development and survival of Metriona elatior (Coleoptera: Chrysomelidae) immatures
Florida Entomologist 91 (3), 491-493
Abstract: The larval developmental rate of the tortoise beetle Metriona elatior Klug (Coleoptera: Chrysomelidae), a potential biocontrol agent of tropical soda apple (TSA) Solanum viarum Dunal (Solanaceae), was studied in the laboratory at 3 constant temperatures (20°, 25°, and 30°C), photoperiod (14:10 L: D), and relative humidity 60%-80% in growth chambers. Sixteen neonate larvae were individually reared on excised TSA leaves placed in 0.5-liter transparent-plastic containers for each temperature treatment. Larvae were daily checked to determine the number and duration of larval instars at each of the temperature tested. At 20° and 25°C, the percent survival from first instar to adult was 75 and 73%, respectively. A constant temperature of 30°C had a detrimental effect on the larvae and none reached the pupa/adult stages. The general life cycle of this beetle is discussed.
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Database assignments for author(s): James P. Cuda, Julio C. Medal

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.

Solanum viarum (weed) Grasses/turf/rangeland U.S.A. (SE)
Metriona elatior (weed bioagent) Solanum viarum (weed) Argentina