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Pentanoic Acid Attracts Olcella parva (Adams) (Diptera: Chloropidae) in Colorado Corn Fields

B. E. Hibbard, D. K. Jewett and L. B. Bjostad
Journal of the Kansas Entomological Society
Vol. 70, No. 1 (Jan., 1997), pp. 67-69
Stable URL: http://www.jstor.org/stable/25085752
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Pentanoic Acid Attracts Olcella parva (Adams) (Diptera: Chloropidae) in Colorado Corn Fields
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Abstract

As part of a study of attractants for western corn rootworm (Diabrotica virgifera virgifera LeConte) adults, short-chain free fatty acids were placed on yellow sticky traps in a Colorado corn field. Olcella parva (Adams) were attracted to traps baited with 10 or 100 mg pentanoic acid. Hexanoic acid (10 and 100 mg) and propanoic acid (100 mg) were also significantly attractive, but significantly less so than pentanoic acid (propanoic acid was also significantly less attractive than hexanoic acid). Other fatty acids tested (heptanoic, octanoic, and nonanoic acids) were not attractive. Male/female O. parva ratios were 2/17 and 0/17 on traps baited with hexanoic and pentanoic acid respectively. These results are different from those of a similar study in Michigan that found hexanoic acid more attractive than pentanoic acid and reported nearly 5 times more males than females on traps baited with hexanoic acid.

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