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The Effect Of Egg Parasitoids On Sunn Pest Economic Threshold
- A.N.Trissi (1), M. El-Bohssini(2) and J.
Ibrahem (1)
(1)Plant Protection Department, Faculty of
Agriculture, Aleppo University, Aleppo, Syria, Email: M.Bohssini@cgiar.org
(2)
International Center for Agriculture Research in the Dry Areas (ICARDA), P.O.
Box 5466, Aleppo, Syria, Email: M.Bohssini@cgiar.org
Abstract
Sunn pest Eurygaster integricep, is a major insect pest of wheat in
Syria. This insect significantly reduces crop quality and yield, by feeding on
leaf, stem and kernel of wheat. Trials in the field cages were carried out to
assess the role of egg parasitoids in suppressing sunn pest populations. The
cages (1x1x1.2 m) contained overwintered sunn pest adults at 2, 4, and 6 sunn
pest adult/m˛ and the female parasitoid, Trissolcus grandis at 0, 1, 2
and 3 adult/m˛. Results showed that one female egg parasitoid reduced
sunn pest population significantly, up to 4 adults/m˛ in the cages
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