Screening of Materials and Analysis and Evaluation of Their Active Constituents for Attracting Liposcelis Entomophila
In this study,a"Y"type olfactometer was used to select the materials with the best attracting effect on Liposcelis entomophila from 25 kinds of food materials.The main volatile components were determined by gas chro-matography-ion mobility spectrometry(GC-IMS).Simulated warehouse trapping experiments were conducted ac-cording to different formulas for individual volatile components with good luring effect.The results showed that white bran had the highest selectivity for Liposcelis entomophila,with a selection coefficient of 0.56.According to the laboratory bioassay results,three volatile components of wheat bran,2-heptanone,1-octen-3-ol and linalool were verified which attracted more efficient to Liposcelis entomophila.Through compound orthogonal test,the at-tractant formula with the best attractant effect was obtained:1.75 μL/g 2-heptanone and 1.00 μL/g 1-octen-3-ol and 5g yeast with 5g milk powder.The corrected trapping rate of this formula reached to 64.44％.
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