Repellency of volatile fatty acids present in frass of larval yellow mealworms,Tenebrio molitor L. (Coleoptera: Tenebrionidae), to larval conspecifics
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Frass of late-instar larvae ofTenebrio molitor L. contained 0.0889 g of butyric acid, 0.0279 g of propionic acid, and 0.0175 g of valeric acid per 100 g. Grouped larvae were strongly repelled by butyric acid at the 10−1 M concentration. Lower concentrations of butyric acid were less repellent. Valeric acid was repellent at 10−1 M to 10−3 M concentrations, below which no tested concentration, including one identical to that occurring in prepared solutions of frass found to be attractive, displayed any effect. Propionic acid was repellent at the concentration in prepared solutions of frass, which were strongly attractive. Concentrations of 10−1 M, 10−3 M, and 10−4 M propionic acid were also found to be repellent. The implications of the repellency of these compounds to groups of mealworm larvae are discussed, with particular reference to the interaction between these frass components and others that have already been studied.
Key wordsRepellency volatile fatty acids propionic acid butyric acid valeric acid yellow mealworm Tenebrio molitor Coleoptera Tenebrionidae
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- Cotton, R.T. 1963. Pests of Stored Grain and Grain Products. Burgess Publishing Co., Minneapolis, Minnesota.Google Scholar
- McFarlane, J.E. 1984. Repellent effect of volatile fatty acids of frass on larvae of German cockroach,Blattella germanica L. (Dictyoptera: Blattellidae).J. Chem. Ecol. 10:1617–1622.Google Scholar
- McFarlane, J.E., andAlli, I. 1985. Volatile fatty acids of frass of certain omnivorous insects.J. Chem. Ecol. 11:59–63.Google Scholar
- McFarlane, J.E., andAlli, I. 1986. Aggregation of larvae ofBlattella germanica L. by lactic acid present in the excreta.J. Chem. Ecol. 12:1369–1375.Google Scholar
- McFarlane, J.E., andAlli, I. 1987. The effect of lactic acid and the volatile fatty acids on the aggregation behavior ofPeriplaneta americana L.Comp. Biochem.Physiol. 86C:45–47.Google Scholar
- McFarlane, J.E., Steeves, E., andAlli, I. 1983. Aggregation of larvae of the house cricket,Acheta domesticus L., by propionic acid present in the excreta.J. Chem. Ecol. 9:1307–1315.Google Scholar
- Prokopy, R.J. 1981. Epideictic pheromones influencing spacing patterns of phytophagous insects, p. 181–213,in D.A. Norland, R.L. Jones, and W.J. Lewis (eds.). Semichemicals: Their Role in Pest Control. Wiley, New York, New York.Google Scholar
- Roth, L. M., andCohen, S. 1973. Aggregation in Blattaria.Ann. Entomol. Soc. Am. 66:1315–1323.Google Scholar
- SAS Institute. 1982. SAS users guide: Statistics (1982 ed.). Statistical Analysis Systems Institute, Inc., Cary, North Carolina.Google Scholar
- Weaver, D.K., andMcFarlane, J.E. 1989. Aggregation in yellow mealworms,Tenebrio molitor L. (Coleoptera: Tenebrionidae) larvae. II. Observations and analyses of behavioral parameters in aggregation.J. Chem. Ecol. 15:1617–1627.Google Scholar
- Weaver, D.K., McFarlane, J.E., andAlli, I. 1989. Aggregation in yellow mealworms,Tenebrio molitor L., (Coleoptera: Tenebrionidae) larvae. I. Individual and group attraction to frass and isolation of an aggregant.J. Chem. Ecol. 15:1605–1615.Google Scholar