Assessment of Thrips Diversity Associated with Two Olive Varieties (Chemlal & Sigoise), in Northeast Algeria

In this study, the diversity of thrips (Insecta: Thysanoptera) on two varieties olive trees (Chemlal and Sigoise) in northeast Algeria (Province Batna), was evaluated for 3 years (2019–2021). addition, fluctuations numbers phytophagous were estimated according to phenological stages. A total 19 species are identified (Liothrips oleae) have just been reported first time Algeria. Only 5 females collected May 2021 Sigoise variety at fruit-setting stage. Haplothrips tritici(17.25%), Frankliniella occidentalis (16.29%) Thrips tabaci most present. It is noticed that present tree only spring (April May), when average monthly temperatures between 10–26 °C, but linear regression analyses not confirmed temperature explain variation numbers, which may be due other climatic factors such as rainfall, while stages affecting population thrips, their number higher variety, especially flowering stage case H. tritici F. T. noticeable fruit growth The relatively low, until inflorescence stage, where start appear before Chemlal.