Louisiana State University and Agricultural & Mechanical College

Sanaa A Ibrahim

Roger A Laine

Gregg Henderson

Betty C R Zhu

Feng Chen

Rosemary Patton

Several derivatives of naphthalene, including 1'-acetonaphthone, 2&#x2032;-acetpnaphthone, 1-methoxynaphthalene, and 2-methoxynaphthalene, were discovered to be effective toxicants and repellents of termites, and resulted in significant reduction in termite feeding activity. For example, 2&#x2032;-acetonaphthone was found to be an effective repellent and feeding deterrent of termites. Termites exposed to concentrations as low as 8 mg/kg sand exhibited a significant reduction in tunneling and feeding activity. Moreover, some of the dead termites had symptoms indicative of a failure to molt. At concentrations &#x2267;20 &#x3bc;g/cm, 2&#x2032;-acetonaphthone was a strong repellent. Interestingly, at 160-fold lower concentration (0.125 &#x3bc;g/cm), 2&#x2032;-acetonaphthone stimulated termite feeding activity. As a sand barrier, 2&#x2032;-acetonaphthone significantly inhibited tunneling and feeding activity in concentrations from 8.33 to 35.0 mg/kg. Molting problems were also identified in termites exposed to 2&#x2032;-acetonaphthone.

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Baton Rouge, LA, United States of America

Sanaa A Ibrahim