Identification and Functions of Ventral Glands Secretion of Some Heteroptera

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Abstract
Chemical analyses of the ventral secretions of some Heteroptera were caried out according to two different sampling methods, solvent extraction of the secretion and adsorption of the airborne components onto the porous polymer beads. Relative amounts of each components differed according to the sampling methods, and suggested that major components in the solvent extract of the secretion did not always constitute volatile portion.Observation of the adult Halyomorpha mista with scanning electron microscope revealed that the cuticles surrounding the orifice of the metathoracic glands was elaborated into mushroom-like structures. And the setae born at the posterior margin of mesosternum possessed the so-called tree-like structure. These structures were supposed to help the active aldehyde in hydrocarbons to evaporate into the air.