Biological and ecological studies on Scymnus syriacus and Scymnus levaillanti (Coleoptera: Coccinellidae)

Both Scymnus syriacus and Scymnus levaillanti are aphidophagous coccinellids. In the laboratory they consumed and successfully reproduced on several species of aphids. Larvae suck the prey contents from aphid appendages, whereas adults consume the whole aphid, except for parts of the appendages. Ext...

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Veröffentlicht in:	European journal of entomology 2006-04, Vol.103 (2), p.501-503
1. Verfasser:	Allawi, T.F.(University of Jordan, Amman (Jordan). Plant Protection Dept.) E-mail:thabet@ju.edu.jo
Format:	Artikel
Sprache:	eng
Schlagworte:	AGENT DE LUTTE BIOLOGIQUE AGENTES DE CONTROL BIOLOGICO aphidophagous coccinellids APHIS GOSSYPII BIOLOGICAL CONTROL BIOLOGICAL CONTROL AGENTS BIOLOGICAL DEVELOPMENT CICLO VITAL Coccinellidae Coleoptera CONTROL BIOLOGICO CYCLE DE DEVELOPPEMENT DEPREDACION DEPREDADORES DESARROLLO BIOLOGICO developmental time DEVELOPPEMENT BIOLOGIQUE DURACION DURATION DUREE ENVIRONMENTAL TEMPERATURE EXPERIMENTACION EN LABORATORIO EXPERIMENTATION EN LABORATOIRE FEEDING PREFERENCES food consumption LABORATORY EXPERIMENTATION LARVAE LARVAS LARVE LIFE CYCLE LONGEVIDAD LONGEVITE LONGEVITY LUTTE BIOLOGIQUE OVA oviposition OVULE OVULO PREDATEUR PREDATION PREDATOR PREY RELATIONS PREDATORS PREFERENCE ALIMENTAIRE PREFERENCIAS ALIMENTARIAS PUPAE PUPAS PUPE RELACIONES PREDADOR PRESA RELATION PREDATEUR PROIE SCYMNUS Scymnus levaillanti Scymnus syriacus TEMPERATURA AMBIENTAL TEMPERATURE AMBIANTE
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Zusammenfassung:	Both Scymnus syriacus and Scymnus levaillanti are aphidophagous coccinellids. In the laboratory they consumed and successfully reproduced on several species of aphids. Larvae suck the prey contents from aphid appendages, whereas adults consume the whole aphid, except for parts of the appendages. Extra-oral digestion is practiced during feeding. The mean number of aphids consumed by the larval stage of S. syriacus when reared at 25 deg C was 95, and 130 aphids at 30 deg C. For S. levaillanti it was 125 and 139 aphids at 25 deg C and 30 deg C, respectively. The mean number of eggs deposited daily by S. syriacus for the first three weeks of adult life was 19.5, with a range of 3-30 eggs at 25 deg C. Longevity of adults ranged from 3 to 4 months at 25 deg C and 2.5-3 months at 30 deg C.
ISSN:	1210-5759 1802-8829
DOI:	10.14411/eje.2006.065