Inoculation with Streptomyces decreases vascular wilt of chickpea infected by Fusarium oxysporum f. sp. ciceri

Abstract

Vascular wilt caused by Fusarium oxysporum f. sp. ciceri (FOC) is a disease that limits the yield of chickpea in Algeria. Biological control with antagonistic microorganisms is one of the alterna ves methods to ght this fungal disease. In this work, we tested an ac nomycete Streptomyces ACT2 against 03 isolates of FOC (FOC8, FOC13, FOC 15) in vivo on three varie es of chick- pea including a sensi ve variety (ILC-482) and two varie es moderately tole- rant (Col-27, PPC-25) in order to highlight its effect on the reduc on or suppression of this disease. The results obtained showed that the degree of suppression of the disease by ACT2 varies from one variety to another and from one FOC isolate to another. The maximum suppression of the disease was observed in the Col-27 variety. The ACT2 isolate showed higher levels of disease suppression in both the moderately sensi ve Col-27 (13.68%) and PPC- 25 (18.78%) varie es than the sensitive variety ILC-482 (8.76%). The Streptomyces (ACT2) can be used as a biological protector of chickpea infected by the pathogen Fusarium oxysporum f. sp. ciceri.