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Release Of Trichogramma Evanescens (West.) In Date Palm Fields As An Eco-Biological Agent For Suppression Insect's Infestation In Date Palms And Dates At El-Bahria Oases , Giza , Egypt
- Mohammad, A. Ali; Monir, M. Metwally and A. E. Hussein
- Department of Plant Protection, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt.
Abstract
Release of the egg parasitoid, Trichogramma evanescens (West.) (Hymenoptera: Trichogrammatidae) in date palm fields at El-Bahria oases , was evaluated as an eco-biological agent for suppression of date infestation with date palm insect pests starting from March 2003. Results revealed a significant efficacy of this parasitoid for controlling insect pests of date palms. Fronds infestation with Arenipses sabella was reduced by 35.6 - 62.4 % while date infested with Batrachydra amydraula was reduced by 58.2 %. Infestation rates of dates infested with Coccotrypes dactylipedra, Deudoris livia and Ephestia (Cadra) calidella were also diminished by 51.3, 80 and 45 %, respectively. Dates of parasitoid release, parasitoid density and number of releases are of great importance as factors influencing the efficacy of the parasitoid action against the insect pests of date palms at El-Bahria oases, Giza, Egypt.
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