Abstract
In the present work we aimed to register the occurrence of galls, inductors, inquilines, and parasitoids in plants of three natural vegetation areas in Delfinópolis, MG, Brazil. Results obtained showed 22 types of galls collected from leaf, vein leaf, petioles, stem, and inflorescence of nineteen species belonging to fifteen distinct families. Concerning gall morphology, the following were collected: globoid, conicle, discoidal, fusiform, shell-shape, indefinite, and one substituition of an ovary by an immature. As principal inducers were found insects of the families Cecidomyiidae (Diptera), Psyllidae, and Diaspididae (Sternorrhyncha/Hemiptera). As parasitoids the most common are of the Chalcidoidea superfamily (Hymenoptera) and, as occasional inquilines, Polyxenidae (Diplopoda) and Psocodea (Psocoptera). The results of this study contribute to existing of knowledge host-plant diversity and gall-associated insects in rocky fields, cerrado, and gallery forests.
Highlights
A galls is a pathologically developed vegetal tissue originating mechanically or chemically in stimulation of inductor agents
According to Mani (1964), these types develop through interaction of host plant and inducer, a hypothesis defended by Abrahamson & McCrea (1986), who proposed that gall phenotype is a result of interaction between two genotypes
In Brazil, the principal host plants of insect galls belong to the Asteraceae, Fabaceae, Myrtaceae, and Anonnaceae families
Summary
A galls is a pathologically developed vegetal tissue originating mechanically or chemically in stimulation of inductor agents. Occhioni (1979, 1981) obtained 35 types of galls in 34 families of plants in the restinga environment; Fernandes et al (1988, 1997) related the occurrence of galls and their characterization in Brazilian cerrado and rocky field plants, and Scarelli-Santos & Urso-Guimarães (submitted) found 37 galls in 16 families of plants in cerrado vegetation. In Brazil, the principal host plants of insect galls belong to the Asteraceae, Fabaceae, Myrtaceae, and Anonnaceae families.
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