Temperature-Dependent Development of the Koinobiont Endoparasitoid Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae): Effect of Host Instar

dc.contributor.author	Eliopoulos, PA	en
dc.contributor.author	Stathas, GJ	en
dc.date.accessioned	2014-06-06T06:45:37Z
dc.date.available	2014-06-06T06:45:37Z
dc.date.issued	2003	en
dc.identifier.issn	0046225X	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/2543
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0242583998&partnerID=40&md5=7b86cf7aa088536ac29123a279bb10ed	en
dc.subject	Development	en
dc.subject	Host instar	en
dc.subject	Temperature	en
dc.subject	Threshold	en
dc.subject	Venturia canescens	en
dc.subject.other	developmental stage	en
dc.subject.other	host-parasitoid interaction	en
dc.subject.other	larval development	en
dc.subject.other	temperature	en
dc.subject.other	Anagasta kuehniella	en
dc.subject.other	Ephestia	en
dc.subject.other	Hymenoptera	en
dc.subject.other	Ichneumonidae	en
dc.subject.other	Invertebrata	en
dc.subject.other	Kuehniella	en
dc.subject.other	Lepidoptera	en
dc.subject.other	Pyralidae	en
dc.subject.other	Venturia canescens	en
dc.title	Temperature-Dependent Development of the Koinobiont Endoparasitoid Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae): Effect of Host Instar	en
heal.type	journalArticle	en
heal.publicationDate	2003	en
heal.abstract	The main effects and interactions between temperature and host instar on development and survival of Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae), a parasitoid of many pyralid (Lepidotera: Pyralidae) larvae, were studied under laboratory conditions. The duration of development in Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) larvae of second, third, fourth and fifth instar and at seven constant temperatures (15, 17.5, 20, 25, 30, 31, and 32°C) was measured. Development time decreased significantly with increasing temperature within the range 15-30°C. When parasitism took place on second instar hosts the parasitoid development took significantly longer compared with other instars. Differences among third, fourth and fifth instar proved to be insignificant. Thermal requirements of development (developmental thresholds, thermal constant, optimum temperature) of V. canescens in each host instar were estimated with application of a linear and one nonlinear model (Logan I). Upper and lower developmental thresholds ranged between 36.01-36.41 and 10.86-11.37°C, respectively. Optimum temperature for development was estimated at between 30.59 -30.81°C. All above-mentioned parameters did not vary significantly with host instar. The thermal constant decreased with host instar at parasitism and ranged between 370.4 and 555.6 d-degrees. Immatures' survival peaked at 30°C and was higher in older instars (third-fifth).	en
heal.journalName	Environmental Entomology	en
dc.identifier.issue	5	en
dc.identifier.volume	32	en
dc.identifier.spage	1049	en
dc.identifier.epage	1055	en