Buscar
Mostrando ítems 11-20 de 75
Evaluation of porous silica glasses as insect pheromone dispensers
(Journal of the Brazilian Chemical Society, 2019)
Chemical communication in Apis mellifera: Temporal modulation of alarm behaviors
(1996-01-01)
The effect of pheromones and their chemical analogues in honeybee alarm behaviors was studied in observation boxes. Defensive behaviors, as follows: a) attraction to scent source, b) elevation of wings in 'V', c) abdomen ...
Optimum spacing of pheromone traps for monitoring the coffee leaf miner Leucoptera coffeella
(Entomologia Experimentalis et Applicata, 2018)
Female pintado catfish choose well-fed males
(Brill Academic Publishers, 2010-01-01)
This study tested the preference of pintado catfish females (Pseudoplatystoma coruscans) for associating with well-fed or food-deprived males in simultaneous choice tests. Females were tested under three different treatments ...
Comparative study of the cuticular hydrocarbon composition of Melipona bicolor Lepeletier, 1836 (Hymenoptera, Meliponini) workers and queens
(2003-12-01)
In social insects, cuticular hydrocarbons are involved in species, kin, caste and nestmate recognition. Gas chromatography and mass spectrometry were used to compare the cuticular hydrocarbon composition of workers, males ...
Quantification of sex pheromone from Anocentor nitens by gas chromatography-mass spectrometry-selected ion monitoring
(2004-02-27)
Two highly sensitive and selective methods based on gas chromatography coupled to mass spectrometry (GC-MS) in the selected ion monitoring (SIM) mode have been developed for the quantification of 2,6-dichlorophenol (2,6-DCP), ...
Identification of sulcatol, a potential pheromone of the ambrosia beetle Gnathotrichus materiarius (Col., Scolytidae)
(Blackwell Verlag Gmbh, 2003-05-01)
We report the identification of a potential pheromone for Gnathotrichus materiarius (Fitch) (Col., Scolytidae). The population sex ratio is close to 1:1, and males initiate attacks on host trees. Headspace and hindgut ...
Morphology of the sternal gland in workers of Coptotermes gestroi (Isoptera, Rhinotermitidae)
(Elsevier B.V., 2006-01-01)
The sternal gland is considered the only source of trail pheromones in termites. The morphology of the sternal gland was investigated in workers of Coptotermes gestroi using transmission and scanning electron microscopy. ...
Response of workers of Atta sexdens rubropilosa (Hymenoptera: Formicidae) to mandibular gland compounds of virgin males and females
(Physiological Entomology, 2018)