Leaf Cutting
Mostrando 13-24 de 107 artigos, teses e dissertações.
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13. VEGETATIVE DEVELOPMENT AND GROWING DEGREE-DAYS OF TROPICAL AND WINTER FORAGES
ABSTRACT One of the limitations to producing irrigated forages is setting suitable biometric parameters to establish the entrance of animals to grazing areas. Such parameters can be measured or even estimated. Estimates are advantageous for being practical and able to be used for grazing optimization. This study aimed to evaluate the correlation among growin
Eng. Agríc.. Publicado em: 25/04/2019
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14. The trade-off between the transmission of chemical cues and parasites: behavioral interactions between leaf-cutting ant workers of different age classes
ABSTRACT Social animals are faced with an intriguing dilemma. On the one hand, interactions between individuals are essential to exchange information and to promote cohesion, while on the other hand such interactions carry with them the risk of catching and transmitting parasites. This trade-off is particularly significant for social insects because low with
Rev. Bras. entomol.. Publicado em: 2017-01
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15. Dynamics of the restoration of physical trails in the grass-cutting ant Atta capiguara (Hymenoptera, Formicidae)
ABSTRACT Dynamics of the restoration of physical trails in the grass-cutting ant Atta capiguara. Leaf-cutting ants of the genus Atta build long physical trails by cutting the vegetation growing on the soil surface and removing the small objects they find across their path. Little is known on the dynamics of trail construction in these ants. How much time do
Rev. Bras. entomol.. Publicado em: 2016-03
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16. Fuzzy Modeling of Reoccupation of a Leaf-cutting Ants' Trail
Neste trabalho, nós modelamos a reocupação de uma trilha de formigas cortadeiras. A modelagem matemática consiste em estudar o deslocamento de formigas cortadeiras em direção a uma região de atração e o retorno das mesmas para o formigueiro. Para conduzir esta pesquisa, nós utilizamos uma equação de difusão-convecção, na qual a dispersão e a
TEMA (São Carlos). Publicado em: 2015-04
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17. Management of the palm Astrocaryum chambira Burret (Arecaceae) in northwest Amazon
We studied the management of the fiber-producing chambira palm Astrocaryum chambira by indigenous people in the Colombian Amazon. Between 2009 and 2012, we visited four communities and two marketing centers, where we interviewed 12 people. In addition, we specifically observed A. chambira harvesting, processing, and commercialization; studied palm population
Acta Bot. Bras.. Publicado em: 2015-03
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18. Protein content of leaf-cutting ant queens before the nuptial flight and during the post-claustral phase
Protein content of leaf-cutting ant queens before the nuptial flight and during the post-claustral phase. This study evaluated the crude protein content of queens of Atta sexdens before the nuptial flight and after the claustral phase in laboratory and field colonies. The hypothesis was that protein is used for survival of the queen and for early colony grow
Rev. Bras. entomol.. Publicado em: 21/11/2014
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19. Agronomic evaluation of 32 sorghum cultivars in the Brazilian semi-arid region
The objective of this study was to evaluate agronomic characteristics of 32 sorghum cultivars (Sorghum bicolor(L). Moench) in the Brazilian semi-arid region. The experimental design was set up in randomized blocks with three replications. Treatments were the 32 sorghum cultivars. The evaluated variables were: plant height, stem diameter, tiller density, numb
R. Bras. Zootec.. Publicado em: 2014-05
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20. Development and validation of a RP-HPLC method to determine the xanthyletin content in biodegradable polymeric nanoparticles
Xanthyletin is used as an inhibitor of the symbiotic fungus (Leucoagaricus gongylophorus) of the leaf-cutting ant (Atta sexdens rubropilosa), one of the most significant agricultural plague insects. The incorporation of this compound into nanoparticles is a promising approach to effectively control leaf-cutting ants. This study presents the development and v
Quím. Nova. Publicado em: 2014
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21. Energetic cost of digging behavior in workers of the leaf-cutting ant Atta sexdens (Fabricius)
Energetic cost of digging behavior in workers of the leaf-cutting ant Atta sexdens (Fabricius). During nest excavation, leaf-cutting ant workers undergo reduction in their body reserve, particularly carbohydrates. In order to estimate the energetic cost of digging, groups of 30 workers of the leaf-cutting ant Atta sexdens were sealed in a hermetic chamber fo
Rev. Bras. entomol.. Publicado em: 06/12/2013
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22. Energy substrate used by workers of leaf-cutting ants during nest excavation
Energy substrate used by workers of leaf-cutting ants during nest excavation. In this study we aimed to ascertain whether leaf-cutting ant workers lose body reserves (fat or sugars) as a function of nest excavation. For each treatment, we isolated 10 workers of Atta sexdens into two experimental groups, Control (C- without excavation) and Soil (S- with excav
Rev. Bras. entomol.. Publicado em: 06/12/2013
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23. A new species of Calonectria causing leaf blight and cutting rot of three forest tree species in Brazil
Several species of Calonectria cause diseases on a wide range of forest tree species that are propagated either via seedlings or rooted cuttings. In nurseries these fungi cause damping-off, cutting and root rots, stem lesions, and leaf blights. Recently a Calonectria sp. was isolated from rooted cuttings of Anadenanthera peregrina (Fabaceae), Piptadenia gono
Trop. plant pathol.. Publicado em: 2013-12
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24. The diet of the black widow spider Latrodectus mirabilis (Theridiidae) in two cereal crops of central Argentina
The spider Latrodectus mirabilis (Holmberg, 1876) is commonly found in cereals crops of central Argentina. We studied its diet composition at the field and capture rate on leaf-cutting ants based on laboratory experiments. This study comprises the first approach that documents the diet of L. mirabilis in wheat and oat fields of central Argentina. We identifi
Iheringia, Sér. Zool.. Publicado em: 2013-12