Results 21 to 30 of about 19,504 (188)

LEVANTAMENTO DE Atta sexdens rubropilosa e Atta laevigata EM FLORESTAS CULTIVADAS DE EUCALIPTOS [PDF]

, 2022
Introdução: O eucalipto é a principal espécie florestal cultivada em solos Brasileiros com aproximadamente 7,7 milhões de hectares. As formigas cortadeiras do gênero Atta são consideradas as principais pragas florestais do continente americano. Essa praga corta as folhas do eucalipto para o cultivo simbionte de um fungo. Elas se alimentam desses fungos
Marcelo de Almeida Reis, Marcos Sandro Felipe   +1 more
openaire   +2 more sources

Simarouba versicolor (Simaroubaceae) Dispersal by the Leaf-Cutter Ant Atta sexdens

Sociobiology, 2018
The importance of Simarouba versicolor St. Hil. fruit dispersal by the leaf-cutting ant Atta sexdens (L.) was studied in the Cerrado, Tocantins, Brazil.
Domingos Rodrigo Silva Lopes, Rodrigo Castro Tavares, Kamila Otoni Marques Batista, Priscila Bezerra de Souza, Mariela Otoni do Nascimento, Danival José de Souza   +5 more
doaj   +3 more sources

Division of labor and specialization in Atta sexdens workers

, 1995
The division of labor according to age and body size has already been observed in several epecies of social insects. In the Atta genus, Carvalho (1972) and Wilson (1980a, 1980b) found unmistakable evidences of the existence of polyethism - division of labor - among workers according to age and body size. Studies with Atta sexdens have proved that small
Rodrigues, Maria Margarida P.
openaire   +3 more sources

ACTIVITY OF LEAF-CUTTING ANT Atta sexdens piriventris SUBMITED TO HIGH DILUTION HOMEOPATHIC PREPARATIONS

Tropical and Subtropical Agroecosystems, 2013
The effect of high dilution preparations on the movement and foraging activities of Atta sexdens piriventris was evaluated. Five colonies of ants were located on each of the five experimental areas using a randomized complete block design.
Alexandre Giesel, Mari Inês Carissimi Boff, Paulo Antonio de Souza Gonçalves, Pedro Boff   +3 more
doaj   +1 more source

Ecology and evolution of pyrazines in insects. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT Chemical communication is the oldest and most widespread form of signalling among and within organisms. Among the many compounds involved in such communication, pyrazines – nitrogen‐containing heterocyclic molecules – are especially intriguing due to their widespread occurrence across the tree of life, from bacteria and fungi to insects and ...
Oudendijk Z, Wahlberg N, Mappes J.
europepmc   +2 more sources

Odontadenia lutea (Apocynaceae) LEAVES: PHYTOCHEMICAL STUDY AND INSECTICIDAL ACTIVITY AGAINST LEAF-CUTTING ANTS Atta sexdens rubropilosa Forel [PDF]

Química Nova, 2021
The present work describes the chemical constituents of Odontadenia lutea (Vell.) Markgr. leaves and the toxicities of its extract and fractions against Atta sexdens rubropilosa Forel (Hymenoptera: Formicidae). Chromatographic procedures of the ethanolic
Weber M. da Silva Junior, Renato G. Santos, Geane K. G. F. Duarte, Gracielle O. S. Cunha, Daniela M. da Silva, Thais F. R. Marchesin, Odair C. Bueno, Antônio Carlos S. Menezes   +7 more
doaj   +1 more source

Distinct and enhanced hygienic responses of a leaf-cutting ant toward repeated fungi exposures. [PDF]

Ecol Evol, 2022
The leaf‐cutting ant Atta sexdens discriminates between different antagonistic fungi and apply distinct responses to remove them from the fungus garden. Also, successive exposures to the same antagonist increase sanitization in the fungus garden.
Goes AC, Kooij PW, Culot L, Bueno OC, Rodrigues A.   +4 more
europepmc   +2 more sources

Occurrence of Leaf-Cutting and Grass-Cutting Ants of the Genus Atta (Hymenoptera: Formicidae) in Geographic Regions of Brazil

Sociobiology, 2020
Leaf-cutting ants are widely distributed in Brazil, particularly species of the genus Atta. We therefore described the occurrence of leaf-cutting and grass-cutting ant species of the genus Atta.
Luiz Carlos Forti, Jael Santos Rando, Roberto da Silva Camargo, Aldenise Alves Moreira, Maria Aparecida Castellani, Suzany Aguiar Leite, Kátia Kaelly Andrade Sousa, Nadia Caldato   +7 more
doaj   +1 more source

Distribution of Atta (Hymenoptera - Formicidae) in "terra-firme" rain forest of Central Amazonia: density, species composition and preliminary results on effects of forest fragmentation [PDF]

Acta Amazonica, 1988
One hundred and fourteen hectares of a "terra-fiirme" rain forest 70 km north of Manaus, Amazonas, Brazil, were surveyed for leaf-cutting ant colonies (Atta spp).
Heraldo Luís de Vasconcelos
doaj   +1 more source

3‐Alkyl‐2‐Methoxypyrazines: Overview of Their Occurrence, Biosynthesis and Distribution in Edible Plants

ChemBioChem, Volume 24, Issue 19, October 4, 2023., 2023
Pyrazines are ubiquitous in nature and biosynthesized by microorganisms, insects, and plants. Especially 3‐alkyl‐2‐methoxypyrazines (MPs) play a key role as important aroma compounds in foods. Recently, in vivo feeding experiments with stable isotope labeled compounds revealed l‐leucine and l‐serine as important precursors for IBMP. This discovery gave
Francesca Zamolo, Matthias Wüst
wiley   +1 more source