BioControl (2000) 45, 453-462

N. Uygun and R. Atlihan (2000)
The effect of temperature on development and fecundityof Scymnus levaillanti
BioControl 45 (4), 453-462
Abstract: Development and fecundity of Scymnus levaillanti (Mulsant) were recorded at five constant temperatures ranging from 15 to 35 ± 1 °C in 5 °C increments, 60 ± 5% RH and 16 h of artificial light (5000 Lux). Developmental time (egg to adult) of S. levaillanti significantly decreased with increasing temperatures, ranging from 63.9 days at 15 °C to 11.1 days at 35 °C. Development from egg to adult required 305.2 DD above a developmental threshold estimated as11.7 °C. Oviposition periods lasted 86.5, 76.1,47.2, and 31.5 days at 20, 25, 30 and 35 °C, respectively. No eggs were deposited at 15 °C.Higher temperatures resulted in shorter generation times (T_O) and in decreased net reproductive rates (R_O) of the coccinellid. S. levaillanti kept at 30 °C produced 0.151 females/female/day, the highest per capita rate of population growth (r_m). The 'functional response' of larvae and adults of S. levaillanti matches well that described by Holling (1959) as Type 2. Daily number of eggs deposited by females increased to a plateau with increasing prey density. Results obtained here provide information about the biology of S. levaillanti, and its feeding capacity indicates that it may act as an important control agent.
(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): Remzi Atlihan, Nedim Uygun

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Scymnus levaillanti (predator)