ACTIVITY OF PEACH TWIG BORER Anarsia lineatella Zeller AND ITS ASSOCIATED BIO AGENTS ON PEACH TREES

ACTIVITY OF PEACH TWIG BORER Anarsia lineatella Zeller AND ITS ASSOCIATED BIO AGENTS ON PEACH TREES

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The seasonal activity of the peach twig borer, Anarsia lineatella Zeller was in-vestigated during 2004 and 2005 seasons.The data revealed that the infested twigs empty from larvae (15%) were higher than that with larvae (1.25%) in February.The situation was reverse in April which recorded 8% and 14.75% for both, respec-tively.

In fruits, infestation began to appear in the dodge warlord for sale third week of March which rec-orded 2% whereas the maximum rate was recorded in May (16.75%).Three species of hymenopterous parasitoids were found; Apanteles ruficrus Haliday (Fam.Braco-nidae), Diplazon laetatorus Fab.(Fam.

Ichneumonidae) and Microgaster tiro Rein-hard (Fam.Braconidae).These parasitoids reached its maximum during April (13.5%) that seems to be more active.Their numbers were positively correlated with the rate of infestation (r = + 0.

799).In spite of presence of four predatory species (Coccinella undecimpunctata L., Rodalia cardinalis Mulsant, and Scymnus syriacus tillman 750m Marseul (Coleoptera: Coccinellidae) and Syrphus sp.(Diptera: Syrphidae)), it seems to be less active.Their numbers recorded very slight positive correlation with the rate of infestation (r =+0.

423).