Entomophaga (1997) 42, 359-366

A. Loni (1997)
Developmental rate of Opius concolor (Hym.: Braconidae) at various constant temperatures
Entomophaga 42 (3), 359-366
Abstract: Opius concolor Szepligeti is a parasite of Bactrocera oleae (Gmelin) and other Tephritid flies. Its development rate was studied with the Sharpe-DeMichele mathematical model, modified by Schoofield et al. (1981), using the S.A.S. program elaborated by Wagner et al. (1984). This program chose a four parameter poikilotherm model with high temperatures inhibition. Duration of parasitoid development at seven constant temperatures ranged from 14.6 ± 1.7 days at 28°C (males); to 77.2 ± 5.5 days at 15°C (females). Male development was consistently found to be shorter than that of females. Low development threshold and degree-days needed to complete total development were determined with the 'Regression Line' and 'Thermal Summation' methods. Values (cumulated for both sexes) were found to be respectively 11.7°C and 11.8°C (low threshold), 255.9 and 251.9 ± 16.8 days (thermal constant). Considerations on the possibility of establishing Opius concolor in northern and central Italian regions are discussed.
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Link to article at publishers website
Database assignments for author(s): Augusto Loni

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bactrocera oleae	Olive (Olea europaea)	Italy
Psyttalia concolor (parasitoid)	Bactrocera oleae	Olive (Olea europaea)	Italy