16 

 exist in sugar meals taken, males may feed more often but in less amount per 



feeding, regardless of age. Location of plant nectar is accomplished possibly by 



visual and most likely by olfactory cues. It has been suggested that nectar feeding 



occurs more often than blood feeding in females; nectar feeding may occur as often 



as once per night [13]. In terms of priority, however, blood meals most likely take 



precedence over nectar sugar (from studies involving /It?, aegypti andAe. albopictus). 



Flower odors play a role in alighting a mosquito onto a plant. The nectar 



sugar itself is not an airborne cue; however, contact sensilla most likely detect the 



presence of sugar. Fruits, honey, milkweed and rose extracts attract mosquitoes; 



strawberry and lilac extracts are suggested repellents [13]. Male Ae. aegypti have 



been found to be attracted to honey odors. Honey fragrance consists of 



methylphenylacetate and ethylphenylacetate and these were found to attract Ae. 



aegypti. Ethyl lactate and methyl propionate function in finding suitable oviposition 



sites [4]. Synthetic fragrances, specifically apple and cherry, were found to be 



attractive for Ae. aegypti [13]. 



Relation to Semiochemical Studies 



Analysis of body secretions and excretions, particularly those focused on 

 perspiration, yields knowledge of compounds present on the skin. Perspiration is a 

 dilute solution of compounds containing salts and other involatile compounds as well 

 as volatiles. Combined liquid chromatography/mass spectrometry (LC/MS) analysis 

 has detected the presence of lactic acid (lactate is a by-product of exercise), urea, 



