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A nest of Sceliphron asiaticum found inside a house in the municipality of Floriano, Piau ́, northeastern Brazil and the habitus of adult Sceliphron asiaticum and Melittobia australica . A. Nest. B. Pupae. C. Lateral and D. dorsal view of an adult S. asiaticum . E. Male and F. Female dorsal view of adult M. australica.
Contexts in source publication
Context 1
... nest of S. asiaticum ( Fig. 1) was collected in May 2011 inside a house in the municipality of Floriano, Piauí, in northeastern Brazil (06u479020S, 43u029250W) and taken to the entomology laboratory at EMBRAPA Meio- Norte, at Teresina, Piauí. The nest was kept in a sealed plastic container so that any emerging parasitoids could be observed. After the parasit- oids ...
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... such as S. assimile (Dahlbom, 1843), S. caementarium, S. fistularium (Dahlbom, 1843) and S. laetum (F. Smith, 1856) worldwide (Freeman and Parnell, 1973;Early and Townsend, 1992;Harris, 1992;Hunt, 1993;Buys, 2009). The nest studied here was constructed mainly of sand soil (mud) and had 12 chambers, each with a single pupa of Sceliphron asiaticum (Fig. 1A). We observed a single egg in each chamber in the S. asiaticum nest. This is similar to other cogeneric species of Sceliphron (e.g., S. assimile and S. laetum) (Hunt, 1993;Elgar and Jebb, 1999). Spider body parts (Fig. 1B) were found near the pupae. (CHNUFPI 0009; Fig. 1C, D). Over 100 winged parasitoids emerged from the sphecid pupae ...
Context 3
... studied here was constructed mainly of sand soil (mud) and had 12 chambers, each with a single pupa of Sceliphron asiaticum (Fig. 1A). We observed a single egg in each chamber in the S. asiaticum nest. This is similar to other cogeneric species of Sceliphron (e.g., S. assimile and S. laetum) (Hunt, 1993;Elgar and Jebb, 1999). Spider body parts (Fig. 1B) were found near the pupae. (CHNUFPI 0009; Fig. 1C, D). Over 100 winged parasitoids emerged from the sphecid pupae sampled. They were identified as M. australica (CHNUFPI 0010; Fig. 1E, F). No wingless parasitoid emerged. The parasitism rate was ...
Context 4
... body parts (Fig. 1B) were found near the pupae. (CHNUFPI 0009; Fig. 1C, D). Over 100 winged parasitoids emerged from the sphecid pupae sampled. ...
Context 5
... S. asiaticum nest. This is similar to other cogeneric species of Sceliphron (e.g., S. assimile and S. laetum) (Hunt, 1993;Elgar and Jebb, 1999). Spider body parts (Fig. 1B) were found near the pupae. (CHNUFPI 0009; Fig. 1C, D). Over 100 winged parasitoids emerged from the sphecid pupae sampled. They were identified as M. australica (CHNUFPI 0010; Fig. 1E, F). No wingless parasitoid emerged. The parasitism rate was ...
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Citations
... When M. rotundata is selected as a host, 1 or several M. acasta females chew into the leaf-wrapped bee cocoon. Once inside, the females sting the larva, inject venom, and feed on hemolymph from the sting wound (González et al. 2004a, 2004b, Deyrup et al. 2006, Carvalho et al. 2014. They then lay clutches of 4-12 eggs, which can sometimes result in so many eggs that the host body is no longer apparent (Schmieder 1933, González andMatthews 2008). ...
Melittobia acasta Walker is one among other hymenopterous parasitoids of Megachile rotundata F. Commercial M. rotundata populations are employed to pollinate North American alfalfa for seed production. This wasp can be prolific when using M. rotundata as a host and can reduce or destroy bee stocks. Hundreds of M. acasta female offspring can develop in a single M. rotundata cell and disperse to infest other cells, producing thousands of more parasitoids. In this study, we determined (i) upon what bee life stages M. acasta females choose to lay eggs and if those eggs ultimately become adults and (ii) M. acasta female longevity when exposed to various resources within M. rotundata cells. We found that M. acasta females lay eggs on M. rotundata prepupae and pupae and that those eggs can hatch and survive to adulthood. Eggs are not laid on early instar bee larvae; eggs laid on adults do not survive. Average female life span is 5 days without feeding, 8-9 days if a pollen-nectar provision is available while the bee develops through larval stages, and 34 days if the wasp can feed on prepupal hemolymph. Wasp females can emerge from bee cells several days after trays of cells are taken to fields. Therefore, adult females could survive long enough for new bee offspring to become prepupae. Our findings support a better understanding of host life stage preference and the longevity of M. acasta females that can inform the timing of the implementation of possible control measures.
... Clutches are composed of 4-12 eggs. Females of various Melittobia species have been reported to invade a single host cell and lay multiple clutches such that hundreds of eggs cover the host (Balfour-Browne 1922, Schmieder 1933, González et al. 2004a, Matthews et al. 2009, Carvalho et al. 2014. Simple life cycles have been described for a few Melittobia species on different hosts, including M. rotundata . ...
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