277 

 Examples of this follow. Lactic acid was found to vary from 5 times greater in the 

 more attractive host to 1.3 times greater in the lesser attractive host. In the same 

 analyses, 12-methyltetradecanoic acid was found to remain fairly consistent at 1.9-2.2 

 times greater relative abundance in the more attractive host. Therefore, the tables 

 reflect not necessarily an average value; they reflect what is found in most of the 

 analyses. However, the variation of components from the same host should be kept 

 in mind when examining the results presented here. These compounds may not 

 necessarily yield the answer to what components are attractants. These compounds 

 are still the more likely candidates for the attractants and should be examined by 

 olfactometer and field studies. 



The presence of 4-hexen-l-ol and l-hepten-3-ol are of particular interest. The 

 use of l-octen-3-ol, as stated in Chapter 1, has been found to attract various species 

 of mosquito. These similar, but lower molecular weight alcohols (and their isomers) 

 may provide better attraction than l-octen-3-ol, again treating mosquito detection as 

 class/structure dependent. The other components of interest were the tertiary amines 

 previously discussed in the section corresponding to table 5-2. These amines were 

 found to be significantly increased in the more attractive host and found to decrease 

 significantly after 8 hours. These two findings fit the profile of attractants sought 

 after. That is, compounds present in greater abundance in the more attractive host 

 and decreased markedly after 6 hours (as noted in olfactometer tests). Care should 

 be taken with this class of compounds; it is unknown whether or not these 



