A methyl ester form of undecanoic acid; inhibits settling of M. persicae by 33.8% in a settling choice assay when applied to C. annuum leaf disks at 50 μg/cm2; inhibits oviposition in B. tabaci; induces mortality in M. javanica at 0.5 μg/μl; a minor component of biodiesel formed by the transesterification of freeze-dried municipal secondary sewage sludge