Results 41 to 50 of about 19,504 (188)

Secondary seed dispersal of Ricinus communis Linnaeus (Euphorbiaceae) by ants in secondary growth vegetation in Minas Gerais Dispersão secundária de sementes de Ricinus communis Linnaeus (Euphorbiaceae) por formigas em vegetação secundária em Minas Gerais

Revista Árvore, 2007
In this study, I tested the efficacy of ants as secondary seed dispersers of Ricinus communis in southeastern Brazil. In a natural population of 143 individuals, I determined the ballistic dispersal distance for 62 seeds and 100 additional seeds were ...
Mário Marcos do Espírito Santo
doaj   +1 more source

POPULATION GENETICS OF Atta sexdens rubropilosa (HYMENOPTERA: FORMICIDAE)

Acta Biológica Colombiana, 2013
The genetic variability of Atta sexdens rubropilosa leaf-cutting ants collected from five brazilian localities was evaluated with PCR-RAPD technique. We used 15 primers producing 148 fragments of which 123 (83,11 %) contained polymorphisms. The estimated Shannon index was 0.3836 ± 0.2335 showing that these ants possess high genetic diversity.
Belizário Cantagalli, Liriana, Aparecida Mangolin, Claudete, Colla Ruvolo Takasusuki, Maria Claudia   +2 more
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Topical toxicity of four active ingredients on Atta sexdens workers

Research, Society and Development, 2022
Leaf-cutting ants are economically important pest insects in the Neotropical region. They forage on fresh leaves and flowers that serve as substrates for the cultivation of their mutualistic fungus, which they feed upon. The main active ingredient for their control is sulfluramid, but the restriction of its use is under discussion.
Marcílio de Souza Barbosa, Ricardo Toshio Fujihara, Luiz Carlos Forti   +2 more
openaire   +1 more source

DETERMINAÇÃO DO CONSUMO DE FOLHAS DE Eucalyptus grandis POR FORMIGUEIROS DE Atta sexdens rubropilosa [PDF]

, 2013
Because ants cut and carry plant material inside their colonies, they become important agents for the accumulation of organic matter in the soil through their disposal chambers.
Ukan, Daniele, Belinovski, Claudiane, Sousa, Nilton José   +2 more
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First record of Cyphoderus innominatus Mills, 1938 (Collembola: Paronellidae) in Early Colonies of the Leaf-cutting Ant Atta sexdens

Sociobiology, 2021
Cyphoderus innominatus Mills, 1938 (Collembola: Paronellidae) was first observed in early colonies of Atta sexdens leaf-cutting ants (Hymenoptera: Formicidae).
Tarcísio Marcos Macedo Mota Filho, Kátia Kaelly Andrade Sousa, Roberto Silva Camargo, João Victor Lemos Cavalcante Oliveira, Nadia Caldato, Douglas Zeppelini, Luiz Carlos Forti   +6 more
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Determinação do fator de conversão em colônias de Atta sexdens rubropilosa (Hymenoptera: Formicidae) e sua relação com a qualidade do material vegetal cortado Determination of the conversion factor in colonies of Atta sexdens rubropilosa (Hymenoptera: Formicidae) and its relationship with the quality of harvested leaf substrate

Revista Árvore, 2007
As formigas cortadeiras (Atta e Acromyrmex) são consideradas importantes pragas na agricultura e silvicultura, mas pouco se sabe sobre os reais danos dessas espécies.
Leandro Sousa-Sou, Marcelo Braga Bueno Guerra, José Henrique Schoereder, Carlos Ernesto Gonçalves Reynaud Schaefer, Washington Luis da Silva   +4 more
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Morphology of ovaries and spermatheca of Atta sexdens (Hymenoptera: Formicidae) queens: implications for oviposition rates [PDF]

Brazilian Journal of Biology
The nest of leaf-cutting ants is founded by a newly mated queen, which lays the first eggs, giving rise to workers responsible for nest construction and colony maintenance.
A. A. Moreira, R. S. Camargo, L. C. Forti, M. I. Camargo-Mathias, M. A. Castellani, J. C. Zanuncio, J. E. Serrão, I. B. Calligaris, B. S. Coelho, M. C. Jean-Baptiste   +9 more
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First record of the occurrence and abundance of phorids (Diptera: Phoridae) associated with leaf-cutting ants of the genus Atta (Hymenoptera: Formicidae) in the municipality of Cruz das Almas-BA

Sociobiology, 2020
As formigas cortadeiras do gênero Atta são consideradas uma das principais pragas florestais e agrícolas. Atualmente, o controle químico com iscas granuladas é considerado o mais eficiente, porém, com a adoção inadequada de manejo pode prejudicar ...
Tamires Doroteo Souza, Rozimar Campos Pereira   +1 more
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Microbial Communities in Different Tissues of Atta sexdens rubropilosa Leaf-cutting Ants [PDF]

Current Microbiology, 2017
Bacterial endosymbionts are common in all insects, and symbiosis has played an integral role in ant evolution. Atta sexdens rubropilosa leaf-cutting ants cultivate their symbiotic fungus using fresh leaves. They need to defend themselves and their brood against diseases, but they also need to defend their obligate fungus gardens, their primary food ...
Vieira, Alexsandro S., Ramalho, Manuela O., Martins, Cintia, Martins, Vanderlei G., Bueno, Odair C.   +4 more
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Atratividade de Atta sexdens rubropilosa por plantas de eucalipto atacadas previamente ou não por Thyrinteina arnobia Atta sexdens rubropilosa attractiveness to eucalyptus plants previously attacked or not by Thyrinteina arnobia

Pesquisa Agropecuária Brasileira, 2004
O sistema de defesa induzido das plantas é ativado após a ocorrência do dano provocado por um herbívoro. O objetivo deste trabalho foi avaliar se plantas de eucalipto (Eucalyptus grandis) atacadas previamente por lagartas de Thyrinteina arnobia tornam-se
Hamilton Gomes de Oliveira, Fabrícia Gonçalves Lacerda, Cidália Gabriela Santos Marinho, Terezinha Maria Castro Della Lucia   +3 more
doaj   +1 more source