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Project ID: ICA4-CT-2001-10004
Financiado con arreglo a: FP5-INCO 2
País: Greece

Improved formulation of sexual pheromone components of Palpita unionalis (E11-hexadecenal, E11-hexadenyl acetate) for application in the mating disruption technique

Natural clays absorbed sensitive organic chemicals protecting them from photo oxidation, regulating the release rate and have been used as carriers for many agrochemicals. Montmorillonite common natural clay was proved effective substrate for the slow release formulation and UV protection of the sex pheromone components ((E)-11-hexadecenal and (E)-11-hexadecenyl acetate of the jasmine moth, Palpita unionalis. The release rate of the two pheromone components tested under field conditions exhibited a first-order release rate for the E-11-hexadecenal, but a more constant release rate for the E-11-hexadecanyl acetate.

The efficacy of the mating disruption against the jasmine moth population was evaluated for three consecutive years in a highly infested olive plantation near Cairo/Egypt. The application of 80g/ha of the formulated pheromone resulted in a male disorientation around 90%, the egg lying by female was reduced on the treated site in comparison to the control, but several mated females were still present.

The method would be mainly suitable for isolated, densely planted olive plantations like the experimental farm in Egypt. It will certainly be possible to strongly reduce the current costs of the pheromone application after further progress towards commercialised production.

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Reported by

Patriarchou Grigoriou & Neapoleos
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