Population dynamics of the gall inducer Eriogallococcus isaias (Hemiptera: Coccoidea: Eriococcidae) on Pseudobombax grandiflorum (Malvaceae)

Eriogallococcus isaias Hodgson and Magalhães is a Neotropical species of gall-inducing scale insect (Coccoidea: Eriococcidae), whose phenological synchrony with its host plant, Pseudobombax grandiflorum, is fundamental to the maintenance of its population. Furthermore, E. isaias is unusual among gal...

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Published inJournal of natural history Vol. 49; no. 13-14; pp. 789 - 801
Main Authors Magalhães, Thiago A., Oliveira, Denis C., Isaias, Rosy M. S.
Format Journal Article
LanguageEnglish
Published Taylor & Francis 11.04.2015
Subjects
conservation biology
Eriococcidae
females
galls
host plants
insect galls
insect-plant interaction
leaves
males
Malvaceae
nymphs
phenological synchrony
population dynamics
scale insects
tropics
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Summary:Eriogallococcus isaias Hodgson and Magalhães is a Neotropical species of gall-inducing scale insect (Coccoidea: Eriococcidae), whose phenological synchrony with its host plant, Pseudobombax grandiflorum, is fundamental to the maintenance of its population. Furthermore, E. isaias is unusual among gall-inducing Eriococcidae because its galls are not sexually dimorphic and are induced by the second-instar nymphs. We studied the life cycles of the host plant and the galling insect, and followed the development of the insects and the structure of the gall. The results showed that gall induction is synchronous with leaf flushing, and that the galls and leaves mature concomitantly. Males have a 36-48-day life cycle within the gall, whereas females have a 75-100-day life cycle.
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ISSN:0022-2933
1464-5262
1464-5262
DOI:10.1080/00222933.2014.951083