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URI permanente para esta coleçãohttps://locus.ufv.br/handle/123456789/11843
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Item Within tree distribution of a gall-inducing Eurytoma (Hymenoptera, Eurytomidae) on Caryocar brasiliense (Caryocaraceae)(Revista Brasileira de Entomologia, 2009-12) Leite, Germano Leão Demolin; Veloso, Ronnie Von dos Santos; Silva, Farley Willian Souza; Guanabens, Rafael Eugênio Maia; Fernandes, G. WilsonFor the first time, we identified the insect herbivore that induces one of the most conspicuous galls on the leaves of Caryocar brasiliense Camb. (Caryocaraceae), a widespread, typical cerrado woody plant of large economic importance. The gall inducing organism is a new and undescribed species of Eurytoma sp. (Hymenoptera, Eurytomidae). Furthermore, we recorded its spatial distribution within C. brasiliense trees. More Eurytoma galls were found on the eastern tree slope, followed the southern and northern slopes. More galls were found in the interior of the tree crown, i.e., on the proximal portion of the stems compared to the terminal portion. At the leaf level, more galls were found on the median region compared to the distal or proximal, perhaps due to the lower trichome density found in there. Leaf colonization by Eurytoma sp. may initiate at the leaf margin but after colonization reaches 50% the central portion starts to be colonized.Item Seasonal damage caused by herbivorous insects on Caryocar brasiliense (Caryocaraceae) trees in the Brazilian savanna(Revista Colombiana de Entomología, 2018-01) Veloso, Ronnie Von Dos Santos; Zanuncio, José Cola; Ferreira, Paulo Sergio Fiúza; Serrão, José Eduardo; Ramalho, Francisco de Souza; Almeida, Chrystian Iezid Maia; Leite, Germano Leão DemolinCaryocar brasiliense (Caryocaraceae) trees have a wide distribution in the Brazilian savanna. This plant is protected by federal laws and is untouched in deforested areas of the Brazilian savanna. This situation increases the damage to leaves, flowers, and fruits from chewing insects. We studied populations of herbivorous Lepidoptera, Coleoptera, and Hymenoptera and their natural enemies on C. brasiliense trees for three successive years during each season in the Brazilian savanna. Phytophagous insects were most abundant at the beginning of winter and with more species and diversity in the summer. Natural enemies were most abundant in the spring and in the winter and with highest species and diversity at end of the winter. Fruits bored by Carmenta sp. (Lepidoptera: Sesiidae) and Naupactus sp.3 (Coleoptera: Curculionidae) on the leaves were highest in the summer. Fruits scraped by Naupactus sp.l and sp.2 were more numerous in the spring and summer, percentage of defoliation in the autumn. Apoptus sp. (Coleoptera: Elateridae) on the leaves in the spring, and leaf miners (Lepidoptera) in the winter. In the case of natural enemies, Crematogaster sp. (Hymenoptera: Formicidae) were most abundant on the leaves and in the flowers in the winter and spring, and on the fruits in the spring when new leaves and flowers are formed. The number of Zelus armillatus (Hemiptera: Reduviidae), Holopothrips sp. (Thysanoptera: Phlaeothripidae), and the complex of spiders were greater on the leaves in the winter; and Trybonia sp. (Thysanoptera: Phlaeothripidae) was most abundant on the leaves in the autumnItem Effects of environmental and architectural diversity of Caryocar brasiliense (Malpighiales: Caryocaraceae) on Edessa ruformaginata (Hemiptera: Pentatomidae) and its biology(Acta Scientiarum. Agronomy, 2015-03-30) Leite, Germano Leão Demolin; Lopes, Paulo Sérgio Nascimento; Zanuncio, José Cola; Martins, Cristina de Paula Santos; Moreira, Thiago Marçal Borges; Costa, Renildo Ismael Félix daWe studied the effect of environmental complexity and plant architecture on the abundance and biology of Edessa rufomarginata (Hemiptera: Pentatomidae) bugs in pastures and cerrado areas. We observed higher numbers of bugs on Caryocar brasiliense (Malpighiales: Caryocaraceae) trees in the cerrado than in the pasture areas. The bugs were more abundant on leaves and branches than they were on fruits. The fruit production of Caryocar brasiliense was higher in the pastures than in the cerrado areas. The abundance of bugs was affect positively by aluminum, organic matter, and tree height but was affected negatively by soil pH. The productivity of C. brasiliense was correlated negatively with aluminum, pH, and number of bugs but was correlated positively with phosphorus and calcium. The number of eggs per clutch was 14.3, the viability was 93% and the embryonic period was 6.9 days. We observed four nymphal instars, the sex ratio was 0.43, and the duration of the life cycle of E. rufomarginata was 156 days. We did not obtain eggs from the adults (F1), which indicated that the leaves were not a good food resource. A diverse environment and high plant crown structure favored populations of E. rufomarginata. The abundance of and the damage caused by this insect indicate that E. rufomarginata is a potential pest on C. brasiliense trees.