Taux d'infestation par Ectomyelois ceratoniae sur certaines variétés de datte dans la région d’Ouargla

Abstract

The aim of this work is to estimate the rate of date-date infestation of dates on different date cultivars in the Ouargla region. It is a question of estimating the rate of date infestation by Ectomyelois ceratoniae in palm trees by comparing the different infestation rates on three types of dates studied (diet dates, dates fallen on the ground and dates of stocks) Of three cultivars (Ghars Deglet-Nour and Degla-Beida). Afterwards, biochemical analysis of the three cultivars studied was carried out with the comparison of the results in four selected stations in the Ouargla region. The cultivar Degla Beida is one of the most infested with rates up to 9.5% in the N’Goussa pyrale station has a greater impact on the dates fallen on the ground and the dates in stocks. In addition, dates were discriminated against by biochemical analyzes ; They are largely slightly acidic to neutral, rich enough in total sugars. The cultivar Ghars is rich in reducing sugars and less rich in sucrose. All cultivars show a variable consistency. The A.C.P. Shows that the date moths prefers semi-soft or dry dates relative to their ratio of total sugars to water and to slightly acidic to neutral dates with a high sucrose content. This result opens new perspectives for the fightagainst this pest.