Soil Drench with Fungicides Alternatives Against Root Rot Incidence of Some Vegetables Under Greenhouse Conditions

Soil drench with furfural, Humic & Folic acid and/or bio-agents treatments were evaluated against root rot incidence of Cucumber, Cantaloupe, Tomato and Pepper in pot experiments. The pathogenic fungi, Fusarium solani, F. oxysporum, Rhizoctonia solani, Sclerotium rolfsii, Sclerotinia sclerotiorum, S. minor, Macrophomina phaseolina, Alternaria solani and Pythium sp. As well as bio-agents, T. harzianum, T. viride, Bacillus subtilis and Pseudomonas fluorescens were used in this study. The obtained results revealed the efficacy of applied some of plant resistance inducers and/or bio-agents as soil drench against tested vegetables root diseases incidence at both pre-, and post-emergence growth stages comparing with untreated control. Applied treatments of the bio-agents in combination with the tested chemicals resulted in higher significant reduction in root rot incidence than each of them alone. Treatments of T. harzianum either alone or combined with chemicals were superior for reducing root rot disease for all tested vegetable plants followed by B. subtilis treatments comparing with the other tested ones. More detailed studies are required to elucidate formulations of antagonists and alternative fungicides for more successful protection against such soil-borne diseases.