Atividade de extratos vegetais e seus derivados sobre o crescimento do fungo simbionte de Atta sexdens L. e outros microrganismos

Pós-graduação em Ciências Biológicas (Microbiologia Aplicada) - IBRC

Influência da polpa cítrica, do óleo e de fungos filamentosos na atratividade de iscas tóxicas à Atta sexdens rubropilosa (Hymenoptera,Formicidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Respostas comportamentais de operárias de Atta sexdens rubropilosa forel, 1908 (hymenoptera, formicidae) a substâncias voláteis

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Determinação do território de forrageamento e avaliação do uso de micro porta-iscas para as saúvas Atta sexdens rubropilosa Forel, 1908 e Atta laevigata Fr. Smith, 1858 (Hymenoptera, Formicidae)

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Ação tóxica de ingredientes ativos em Atta sexdens rubropilosa Forel, 1908 (Hymenoptera: Formicidae) visando seu emprego em iscas formicidas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento de iscas atrativas para a formiga cortadeira de gramíneas Atta capiguara Gonçalves, 1944 (Hymenoptera, formicidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudos toxicológicos de princípios ativos utilizando como modelo Atta sexdens rubropilosa (Hymenoptera, formicidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ocorrência de espécies de Atta Fabricius, 1804 e Acromyrmex Mayr, 1865 em algumas regiões do Brasil

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Seleção de ingredientes ativos para o desenvolvimento de iscas tóxicas para o controle de formigas-cortadeiras (Hymenoptera: Formicidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Translocação dos herbicidas glyphosate e imazamox em plantas de aguapé

Eichhornia crassipes is one of the main weeds found in aquatic environments, being undesirable for many activities. The aim of this study was to evaluate the translocation of glyphosate and imazamox in E. crassipes. Eight intervals were studied for cutting leaves that received herbicides: 2, 4, 6, 8, 12 and 24 hours after application (HAA), and a treatment with no cutting (untreated). The glyphosate dose was 2,160 g a.e. ha-1 (commercial product - Rodeo) + 0.5% v v-1 Aterbane adhesive spreader and imazamox at 290.4 g i.a. ha-1 (commercial product - Clearcast). The treatments were installed in a completely randomized design with four replications. Glyphosate showed a bad control for all the periods of leaf cutting. The imazamox did not provide control within 12 HAA, while from 24 HAA onward the control was effective. There was not a great mobility of the glyphosate molecule in water hyacinth plants, a period above 24 hours being needed for a satisfactory translocation. For imazamox at least 24 hours were needed after herbicide application for the translocation to occur along with subsequent control.

Diversidade e evolução na simbiose entre bactérias e formigas Attini

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Ontogenia das trilhas físicas em Atta capiguara Gonçalves 1944 (Hymenoptera: Formicidae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

The metapleural glands of fungus-growing and non-fungus-growing ants: Ultrastructural study

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fungos fitopatógenos associados às formigas cortadeiras (Formicidae: Tribo Attini)

The ants of genus Atta belong to the Attine tribe (order Hymenoptera, family Formicidae, subfamily Myrmicinae) and are commonly known as leaf-cutting ants for having the habit of cutting several vegetable species used as substrate for growing mutualistic fungus (Agaricales: Lepiotaceae). Recent studies showed that, in addition to that, other fungi may occur in the nests in a dorment state or participate in the functioning dynamic of this symbiosis. Researches related to surveys of fungus biodiversity in nests of different Atta species have found important phytopathogenic representatives. In Brazil, studies about integrated management of plagues, developed by Embrapa Meio Ambiente (Embrapa Environment), point out the need of higher investments in projects that involve the phytopathogenic transmission by insects in order to reduce costs to control them or minimize environmental impact. The purpose of this study was to broaden the knowledge about the ecology of these fungi, isolating and identifying species associated with Attine tribe ants, thus understanding the scope of pathogenic and phytopathogenic species spread by these ants. For that reason, gynes were collected from Atta laevigata and Atta capiguara anthills located at Unesp Botucatu (São Paulo, Brazil) campus. In order to isolate the fungus, the mineral oil floating technique was used. The identification of the isolated fungi was done based on microscopic and molecular characteristics using DNA ribosomal sequencing. The most highly abundant genera found so far were: Cladosporium, Exophiala, Penicillium, Acremonium, Phialophora and Teratosphaeria. Representatives of the genera Exophiala, Phialophora and Cladosporium may be human pathogens, whereas Teratosphaeria and Penicillium are related to diseases in Eucalyptus and citric fruits, respectively. The results show that these ants may host important fungal species besides the ones already... (Complete abstract click electronic access below)

Análise morfológica de operárias de Atta sexdens rubropilosa tratadas com thiamethoxam

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)