First assessment of oviposition-deterring pheromone in an aphidophagous coccinellids
For the first time, chemical nature of an oviposition-deterring pheromone was identified in predatory insects by the use of bioassay guided fractionation. Active oviposition-deterring component in tracks of the aphidophagous coccinellid, Cheilomenes sexmaculata larvae, was (Z)-pentacos-12-ene. The alkaloid coccinelline and saturated hydrocarbons that occur in larval tracks and in the extract of larvae were individually tested also, but proved to be inactive.
For the first time, chemical nature of an oviposition-deterring pheromone was identified in predatory insects by the use of bioassay guided fractionation. Active oviposition-deterring component in tracks of the aphidophagous coccinellid, Cheilomenes sexmaculata larvae, was (Z)-pentacos-12-ene. The alkaloid coccinelline and saturated hydrocarbons that occur in larval tracks and in the extract of larvae were individually tested also, but proved to be inactive.
Details of procedures and the synthesis and of (Z)-pentacos-12-ene were published in: Klewer N., Růžička Z., Schulz S., 2007: J. Chem. Ecol., 33: 2167-2170.
