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The Influence Of The Inherited Sterility On The Behavior Of The Carob Moth
Ectomyelois ceratoniae (Lepidoptera: Pyralidae)
- J. Mediouni, (1)and M.H. Dhouibi (2)
(1) Institut National de la Recherche Agronomique de Tunisie, Rue
Hédi Karray, 2049-Ariana, Tunisia
E-mail: joudamediouni@lycos.com
(2)
) Institut National Agronomique de Tunisie, 43 Rue Charles Nicoles, 1082 Cité
Mahrajene Tunis, Tunisia.
Abstract
The Carob moth Ectomyelois ceratoniae Zeller is the most important and
destructive insect pest of dates (Phoenix dactylifera L.) in Tunisia. It
is a polyphagous insect which causes serious injures on several other
host-plants, both in storage and in the field in the Mediterranean basin and
Near East regions. It induces great economic losses each year. The successful
results of sterile insects program established against many moths and the
possibilities of developing sexually defined strains in Lepidoptera, encouraged
us to try the inherited sterility as a biological control method against carob
moth. Therefore, since 1999, a control program was conducted in Tunisia focusing
on the release of either partially sterile males or fully sterile females of
carob moth, Ectomyelois ceratoniae, treated with gamma rays. The effect
of 400 Gy gamma rays dose on males spread and females attraction was
investigated. Results showed that males treated with this dose were able to fly
up to 120 m from their release site. According to trap records, it seems that
irradiated females were similar to non-irradiated females in attracting males
suggesting that irradiation has no harmful effect on females
attractivity.
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