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Title:Effect of Systemic Fungicide (combination of Cyproconazole and Propiconazole) Newly Introduced in Algeria on Septoria of Two Varieties of Wheat (Triticum Durum Desf) Authors: Hennouni; N.; Djebar; M.R. Djebar-Berrebbah; H. DOI: Aff: Agronomy Department, El Taref University Centre, El Taref, 36000, Algeria. Author Email: firstname.lastname@example.org Keywords: Fungicide;Algeria;Cyproconazole;Durum Wheat;Water Loss;Water Contents;Flowering Plants;Statistical Analysis URLs:ABSTRACT-HTML | FULLTEXT-PDF | Abstract:The purpose of this study was to test the effect of three doses of a newly introduced fungicide in Algeria, it is the ARTEA 330EC) on Septoria (leaf disease) of two durum wheat varieties (GTAdur and BIDI17 ). The experiment was conducted under natural conditions of the field at the EAC No. 1 Khrouf Bachir El-Karma (W. Annaba) and in the laboratory of the University of Plant El TARF. In the field and to assess the degree of attack of the disease on two varieties of durum wheat used, readings or simultaneous notations were made about the intensity of the disease, a direct reading was made by determining the percentage of the surface of the sheet contested. In the laboratory, the study examined the effect of three doses of the product on the physiology and biochemistry of two durum wheat varieties. To do this, all three doses were applied at early flowering plants, these treatments were compared to a control infected with the disease. The rate of water loss from leaves (RWL), the relative water content (RWC) and chlorophyll content, total carbohydrates, total protein and proline of the extract of leaves of treated plants and infected were determined. The results validated by statistical analysis revealed that the fungicide tested greatly reduces recovery pycnidial and reductions in severity up to 80% compared with control plants. The rate of water loss of treated leaves drop significantly which leads to an increase in their relative water content. Chlorophyll and total carbohydrate were higher in treated plants compared with control plants. Finally, for proline, the treated plants, in general, have a content of this osmolyte, greater than that of control plants especially in the GTA Hard variety.