| Autor: |
Fleck, Marciane Danniela, Costa, Ervandil Corrêa, Araujo, Maristela Machado, Schoeninger, Karine, Machado, Leonardo Mortari, Silva, Jéssica Maus da, Pedron, Leandra, Machado, Dayanna do Nascimento, Boscardin, Jardel |
| Zdroj: |
Revista Brasileira de Entomologia; July-September 2019, Vol. 63 Issue: 3 p212-216, 5p |
| Abstrakt: |
Forest species can have their seeds damaged by granivorous insects, especially by those in their larval stage. In this context, this study aims to report the occurrence of Amblycerusspecies in Cordia trichotomaseeds, to describe their main damage to seeds and effects on germination, as well as their associated hymenopteran parasitoids. Therefore, seven trees were selected in the municipality of Taquaruçu do Sul, RS, Brazil. Fruits were collected weekly from the medium third of the tree crown, from the beginning of their formation until total dehiscence. To examine the damage caused by granivorous insects within the fruits, 15 fruits from each tree were sectioned with a scalpel. Furthermore, 10 fruits from each tree were stored individually in clear plates to verify the occurrence and identification of granivorous insect species. Evidence of the damage caused to seeds was verified through the germination test by comparing preserved and damaged seeds, with four repetitions of 25 seeds each. The species Amblycerus longesuturalisand Amblycerus profaupar(Chrysomelidae: Bruchinae) were found associated with fruits of C. trichotoma. Female insects predominantly laid eggs on the superior part between the marcescent calyx and the fruit, and larvae perforated the fruit tegument to start consuming seed embryos and reserves. Bruquine larvae are parasitized by Hymenoptera of Bracon, Mirax, Omeganastatusand Triapsisgenera. In conclusion, the germination of C. trichotomaseeds is significantly affected by emergence orifices caused by granivorous species. |
| Databáze: |
Supplemental Index |
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