Semiochemicals
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. Use of traps in order to obtain threshold and correlation between infestation level and capture of Hypothenemus hampei on coffee fields / Uso de armadilha visando geração de nível de ação e correlação entre captura e infestação de Hypothenemus hampei na cultura do café
A tomada de decisão de controle da broca-do-café, Hypothenemus hampei, é baseada na avaliação de frutos broqueados na época de trânsito dos adultos. O uso desta técnica de amostragem é oneroso e dá ao cafeicultor pouco tempo para a tomada de decisão de controle, o que constitui problema tanto para pequenos como para grandes produtores. Assim, visa
Publicado em: 2006
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14. Isolamento, identificação, síntese e avaliação de campo do feromônio sexual do minador-dos-citros, Phyllocnistis citrella Stainton, 1856 (Lepidoptera: Gracillariidae) / Isolation, identification, synthesis and field evaluation of the sex pheromone from the citrus leafminer, Phyllocnistis citrella Stainton, 1856 (Lepidoptera: Gracillariidae)
The objectives of this work were to isolate, identify, and synthesize the sex pheromone of Phyllocnistis citrella Stainton, 1856 (Lepidoptera: Gracillariidae), as well as to evaluate its efficiency in field conditions, to rationalize the control of this pest within a Citrus Integrated Pest Management scope. The research was developed at the Insect of Biology
Publicado em: 2006
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15. Feromônios associados aos coleópteros-praga de produtos armazenados
One strategy to overcome risks of insecticide-based control in agriculture is to use semiochemicals. In the case of pheromones, these specific compounds can be applied in traps to detect and monitor the occurrence, abundance and distribution of insect pests. Reliable detection helps to time insecticide sprays, to decide the quantity of insecticide that will
Química Nova. Publicado em: 2005-06
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16. A quantitative threshold for nest-mate recognition in a paper social wasp
Nest-mate recognition is fundamental for protecting social insect colonies from intrusion threats such as predators or social parasites. The aggression of resident females towards intruders is mediated by their cuticular semiochemicals. A positive relation between the amount of cues and responses has been widely assumed and often taken for granted, even thou
The Royal Society.
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17. Volatile Semiochemicals Released from Undamaged Cotton Leaves (A Systemic Response of Living Plants to Caterpillar Damage).
Cotton plants (Gossypium hirsutum L.), attacked by herbivorous insects release volatile semiochemicals (chemical signals) that attract natural enemies of the herbivores to the damaged plants. We found chemical evidence that volatiles are released not only at the damaged site but from the entire cotton plant. The release of volatiles was detected from upper,
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18. Structure, stereochemistry, and thermal isomerization of the male sex pheromone of the longhorn beetle Anaglyptus subfasciatus.
Male-released sex pheromone constituents of the longhorn beetle Anaglyptus subfasciatus (Coleoptera: Cerambycidae) are identified by GC-MS and GC-Fourier transform infrared as a 7:1 molar mixture of 3-hydroxy-2-hexanone and 3-hydroxy-2-octanone. These two compounds undergo thermal isomerization during GC analyses to give the corresponding 2-hydroxy-3-alkanon
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19. Moth chemosensory protein exhibits drastic conformational changes and cooperativity on ligand binding
Chemosensory proteins (CSPs) have been proposed to transport hydrophobic chemicals from air to olfactory or taste receptors. They have been isolated from several sensory organs of a wide range of insect species. The x-ray structure of CSPMbraA6, a 112-aa antennal protein from the moth Mamestra brassicae (Mbra), was shown to exhibit a novel type of α-helical
The National Academy of Sciences.