Stimulation of systemic resistance in strawberries against gray mold disease caused by Botrytis Cinerea using amino butyric acid and melatonin

Abstract

The study aimed to isolate and diagnose the fungus that causes gray mold disease in strawberries, and the study showed the spread of the fungus Botrytis cinerea in all areas of sample collection (Baghdad - Anbar - Babylon - Salah al-Din). Reducing the infection rate to (28%, and 32.33%) in the strawberry plant compared to the control treatment contaminated with the pathogenic fungus (82.67). The results showed a significant effect of the above induction factors in reducing the diameter growth rate and the dry weight rate of the biomass of the fungus, which reached (2.80 cm, 4.67 cm) and (0.253, 0.357 mg) respectively, compared to the control treatment with a diameter of (9 cm, 0.423 mg). For the inducing factors BABA and Melatonin, the results showed a significant increase in the rate of peroxidase enzyme activity, as it reached Melatonin (48.248 minutes gm fresh weight-1) and BABA (37.330 minutes gm fresh weight-1). Accumulated total phenols achieved BABA (3.203 mg fresh weight-1) and Melatonin (2.635 mg fresh weight-1). Keywords: Stimulate; Botrytis cinerea; BABA; Melatonin; Strawberry