Size Preference and Sex Ratio for
Pteromalus cerealellae
(Hymenoptera: Pteromalidae) Parasitizing
Sitotroga cerealella
(Lepidoptera: Gelechiidae) in Stored Corn

Wen, Biran; Weaver, David K.; Brower, John

doi:10.1093/ee/24.5.1160

Cited by 19 publications

(18 citation statements)

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“…However, Nakamura and Noda (2002) reported nonsignificant difference in sex ratio among host sizes in O. sokolowski. In the present investigation, the results on sex ratio of N. thymus, when developed on M. domestica of different sizes, conform those recorded by Charnov et al (1981), Bovida et al (1995), King (1987King ( , 1988King ( , 1993, Visser and van Alphen (1987), Heinz and Parrella (1990), Islam (1995), Nechols and Kikuchi (1985), Wen et al (1995), Omwega and Overholt (1997), Ueno and Tanaka (1997) and Ueno (1998).…”

Section: Discussionsupporting

confidence: 89%

“…Significant positive correlation between host size and female and total progeny production has been noticed in N. thymus. The higher female and total progeny allocation to larger hosts by N. thymus fell in line with those of Seko and Nakasuji (2004), Hagver and Hofsvang (1986), Omwega and Overholt (1997), Wen et al (1995), Nepoleon and King (1999) and Opp and Luck (1986).…”

Section: Discussionsupporting

confidence: 67%

“…Parasitoid total progeny has been recorded to be higher when bigger hosts were parasitized by Parnara guttata Bremer et Grey (Seko and Nakasuji (Hagver and Hofsvang 1986), and C. flavipes (Omwega and Overholt 1997). Similarly, greater number of female progeny allocation to larger hosts and male progeny to smaller hosts has been reported in Pimpla cerealellae (Wen et al 1995), S. endius (Nepoleon and King 1999), and A. melinus and A. lignanensis (Opp and Luck 1986). Significant positive correlation between host size and female and total progeny production has been noticed in N. thymus.…”

Section: Discussionmentioning

confidence: 88%

“…Reports have indicated a positive correlation between adult parasitoid size and host size in D. basalis (Islam 1995), Anisopteromlus calandrae (Howard) (Okamato 1972), Gelis coruptor and T. evanescens (Salt 1940), T. evenescens (Salt 1940), Trichogramma sp. (Greenberg et al 1998;Reznik and Umarova 1990), Anagyrus mangicola Noyes (Bokonon-Ganta et al 1995), and Pteromalus cerealellae (Wen et al 1995). Bokonon-Ganta et al (1995) also reported that female were bigger than males, irrespective of the size of the host.…”

Section: Discussionmentioning

confidence: 96%

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Reproductive performance of Nesolynx thymus (Hymenoptera: Eulophidae) as influenced by host (Musca domestica) size

Aruna

Manjunath

2009

BioControl

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An investigation was conducted to understand the influence of host size on the reproductive performance of Nesolynx thymus, an ecto-pupal parasitoid of the uzi fly, Exorista bombycis, inflicting 10-20% loss to silkworm crops in the southern silk producing states of India. Two day-old adults of N. thymus were allowed to parasitize pupae of M. domestica, categorized into big and small at a parasitoid-host ratio of 1:20. After parasitoid adult eclosion, data on parasitization rate, developmental duration, male, female and total adult recovery per pupa and per female, sex ratio, adult size and adult longevity were recorded. The performance of first generation adults as influenced by host size was also recorded by allowing the first generation adults to parasitize three day-old pupae of E. bombycis. The parameters female and total progeny production per female, sex ratio, longevity, body length and wing span of males, females, head width of male, and abdomen length of female increased significantly with host size. No impact of host size was observed on performance of first generation adults.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 96%

See 2 more Smart Citations

Reproductive performance of Nesolynx thymus (Hymenoptera: Eulophidae) as influenced by host (Musca domestica) size

Aruna

Manjunath

2009

BioControl

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“…Measurements of the widths of larval head capsules have been used by many authors to characterize larval instars in parasitoids (Dyar 1890; Odebiyi and Bokonon-Ganta 1986;Wen et al 1995). In the current study, we observed considerable overlap in the range of the widths of the head capsules of third and fourth instars of P. cerealellae, as reported also for E. lopezi (Löhr et al 1989).…”

Section: Discussionmentioning

confidence: 99%

Morphology and development of Pteromalus cerealellae (Ashmead) (Hymenoptera: Pteromalidae) on Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

Onagbola

Fadamiro

2007

BioControl

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Pteromalus cerealellae (Ashmead) (Hymenoptera: Pteromalidae) is an ectoparasitoid of several stored-product insect pests. Very little information has been published on its biology and development in host larvae, which typically are concealed within seeds. We documented the development of P. cerealellae within fourth instar larvae of its concealed host, Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae) infesting cowpea seeds. The preimaginal life stages of the parasitoid were characterized for the first time using morphological structures revealed by microscopic techniques including scanning electron microscopy. Pteromalus cerealellae produces hymenopteriform eggs and larvae. Eggs hatch into 13-segmented first instar larvae with peripneustic condition of spiracles. The larvae have simple, tusk-like mandibles, whereas the mandibles of the pupae and the adults are of the conventional toothed types. Using statistical analyses of the sizes of the larval mandibles and head capsules in conjunction with reliable characters such as the number of exuviae on the body of parasitoid larvae, cuticular folding, and excretion of the meconium, we recorded four larval instars for P. cerealellae. The data showed significant positive correlations between larval mandible lengths and widths of larval head capsules, as well as between mandible lengths and larval instars, suggesting that mandible length is a good predictor of the number of instars in P. cerealellae. Developmental time from egg to adult emergence was *12 d for females and *11 days for males at 30 ± 1°C, 70 ± 5% r.h. and 12L:12D photoperiod.

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Host plant effects on parasitoid attack on the leaf beetle Chrysomela lapponica

Zvereva

Rank

2003

Oecologia

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Larvae of the leaf beetle Chrysomela lapponica obtain salicyl glucosides (SGs) from the host plant to produce a defensive secretion with salicylaldehyde. In northern Russia, larvae and pupae experience high parasitism by the phorid fly Megaselia opacicornis and tachinid fly Cleonice nitidiuscula. We compared the suitability of the SG-rich Salix borealis and SG-poor S. caprea and S. phylicifolia to Ch. lapponica and tested whether enemy pressure on Ch. lapponica varies among host species that differ in SG content. In the laboratory, survival of Ch. lapponica larvae was higher on S. borealis than on S. caprea and S. phylicifolia, while adult body mass was higher on S. borealis and S. caprea than on S. phylicifolia. In the field, parasitism by both M. opacicornis and Cl. nitidiuscula was greater on beetles from S. borealis than from the SG-poor S. caprea or S. phylicifolia. In a laboratory choice test, the pupal parasitoid M. opacicornis laid similar numbers of eggs on beetles reared on SG-rich and SG-poor willows, suggesting that the host plant-derived defence is not effective against this parasitoid. In a field enemy-exclusion experiment, beetle survival was greatly enhanced by the exclusion of enemies, but survival rates did not differ between S. borealis and S. caprea, although larvae developed faster on S. borealis. On the other hand, parasitism and predation were observed more often on S. borealis than on S. caprea. Thus, beetle larvae perform better but also suffer higher predation and parasitism on S. borealis than on SG-poor willows. Ch. lapponica does not appear to obtain enemy-free space by feeding on SG-rich willow species.

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Size Preference and Sex Ratio for Pteromalus cerealellae (Hymenoptera: Pteromalidae) Parasitizing Sitotroga cerealella (Lepidoptera: Gelechiidae) in Stored Corn

Cited by 19 publications

References 0 publications

Reproductive performance of Nesolynx thymus (Hymenoptera: Eulophidae) as influenced by host (Musca domestica) size

Reproductive performance of Nesolynx thymus (Hymenoptera: Eulophidae) as influenced by host (Musca domestica) size

Morphology and development of Pteromalus cerealellae (Ashmead) (Hymenoptera: Pteromalidae) on Callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)

Host plant effects on parasitoid attack on the leaf beetle Chrysomela lapponica

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