Effect of ground addition and spraying with ALGA seaweed extract on the chemical traits of Citrus aurantium seedlings

Abstract

This study aimed to isolate some pathogenic fungi from tomato plants infected with root rot disease, diagnose them, test their pathogenicity, and try to control the causes of tomato root rot disease using EM-1 microorganism preparations under laboratory conditions. The results of the field survey that was conducted in some fields of Karbala, Baghdad and Babylon governorates showed the spread of root rot disease in the areas covered by the field survey, with an infection rate ranging between 62-100% and an infection severity of 35-57%. Several types of fungi were isolated and identified from the roots of tomato plants infected with root rot disease. The most frequent pathogenic fungi were Fusarium solani, followed by Rhizoctonia solani and Macrophomina phaseolina. The results showed that all tested fungi isolates were pathogenic and led to any significant reduction in the percentage of germination, compared to the comparison treatment. The results showed the ability of the EM1 microorganism preparation to inhibit the growth of pathogenic fungi F.solani Fs1, R.solani Rs5 and M. phaseolina Mp8 on PDA culture medium. The EM1 showed the highest effect at 5, 10 and 15% concentrations on pathogenic fungi growth, as the percentage reached The percentage of inhibition is 100%.