Osajin and Pomiferin, Two Isoflavones Purified from Osage Orange Fruits, Tested for Repellency to the Maize Weevil (Coleoptera: Curculionidae)

Chris Peterson; Anne Fristad; Rong Tsao; Joel R. Coats

doi:10.1603/0046-225X-29.6.1133

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Chris Peterson,¹ Anne Fristad,² Rong Tsao,³ Joel R. Coats⁴

¹Pesticide Toxicology Laboratory, 116 Insectary, Department of Entomology, Iowa State University, Ames, IA 50011
²Pesticide Toxicology Laboratory, 116 Insectary, Department of Entomology, Iowa State University, Ames, IA 50011; Current address: Luther College, Decorah, IA, 52101
³Pesticide Toxicology Laboratory, 116 Insectary, Department of Entomology, Iowa State University, Ames, IA 50011; Current address: Agriculture Canada, Vineland, ON, Canada
⁴Pesticide Toxicology Laboratory, 116 Insectary, Department of Entomology, Iowa State University, Ames, IA 50011; To whom correspondence should be addressed

Abstract

The fruit of the osage orange tree, Maclura pomifera (Raf.) Schneid (Moraceae), has long been thought to be repellent to insects. A preliminary study reported here confirmed repellency of fruit extracts to the maize weevil, Sitophilus zeamais Motschulsky. Two isoflavones, osajin and pomiferin, were isolated from the mature fruit of M. pomifera in high purity (≥95%). Testing of purified osajin and pomiferin failed to show repellency. Repellency is likely caused by factors other than isoflavones in the fruit.

Citation Download Citation

Chris Peterson, Anne Fristad, Rong Tsao, and Joel R. Coats "Osajin and Pomiferin, Two Isoflavones Purified from Osage Orange Fruits, Tested for Repellency to the Maize Weevil (Coleoptera: Curculionidae)," Environmental Entomology 29(6), 1133-1137, (1 December 2000). https://doi.org/10.1603/0046-225X-29.6.1133

Received: 14 February 2000; Accepted: 1 August 2000; Published: 1 December 2000