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| Almeida,Felipe V.M.; Santos,Jean C.; Silveira,Fernando A.O.; Fernandes,Geraldo W.. |
| The frequency of galls induced by Anisodiplosis waltheriae Maia, a recently described species, on Waltheria indica L. was studied. W. indica is an invasive weed in regeneration areas of Atlantic Forest in southeastern Brazil. Plants were collected in May 2004 and above-ground biomass, main stem length, number of leaves, number of galls per leaf and leaf area of each individual were recorded. Nearly 90% of all plants and 25% of all leaves were attacked by the gall midge, with an average of 0.67 galls/leaf. Leaf area had a weak effect on gall abundance while the number of leaves had no effect on gall abundance. Only 31% of the variation in gall abundance was explained by plant biomass. Natural enemies killed one third of the sampled galls. Predation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aimorés; Atlantic Forest; Insect gall; Herbivory; Mortality factor; Biological invasion. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000400002 |
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| Santos,Jean C.; Viana,Leonardo R.; Silveira,Fernando A. O.; Penteado-Dias,Angélica M.; Fernandes,G. Wilson. |
| The oviposition behaviour of the braconid parasitoid, Compsobracon mirabilis ( Szépligeti, 1901) is described. Observations were conducted in a cerrado region located in Três Marias, Minas Gerais, Brazil. The oviposition occurred in a branch of Alibertia concolor (Cham.) K. Schum. 1889 (Rubiaceae), inside of which there were thirteen larvae of an unidentified species of Lepidoptera. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alibertia concolor; Braconidae; Hymenoptera; Oviposition behaviour; Parasitism. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000100024 |
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| Santos,Jean C.; Silveira,Fernando A. O.; Pereira,Ellen C.; Fernandes,G. Wilson. |
| Pattern of attack of a galling insect reveals an unexpected preference-performance linkage on medium-sized resources. The Plant Vigor Hypothesis (PVH) predicts oviposition preference and higher offspring performance on longer and fast-growing shoots, and although several studies have tested its predictions, long-term studies concerning the patterns of host selection by galling species are still lacking. The PVH was tested in this study using Bauhinia brevipes (Fabaceae) as the host of a leaf gall midge, Asphondylia microcapillata (Diptera, Cecidomyiidae) during three consecutive years. Shoots were collected from the same 80 plants between 2001 and 2003 and shoot length, number of healthy and galled leaves, gall number, and mortality factors were recorded.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Host selection; Insect galls; Mortality factors; Plant Vigor Hypothesis; Top-down effect. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000100012 |
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