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

Abstract

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.

Efficacy of Rhizobacteria and Humic Acid for Controlling Fusarium Wilt Disease and Improvement of Plant Growth, Quantitative and Qualitative Parameters in Tomato

“…Also, Humic acid (HA) suspensions based on potassium humates have been applied successfully in many areas of plant production as a plant growth stimulant or soil conditioner for enhancing natural resistance against plant diseases (Scheuerell and Mahaffee, 2004), stimulating plant growth through increased cell division, as well as optimizing uptake of nutrients and water and stimulating soil microorganisms (Chen et al, 2004). Several reports indicated the efficiency of HA in reducing some plant diseases (Yigit and Dikilitas, 2008, Abdel-Kader et al, 2012. The objective of this study was carried out to assess the efficacy of certain PGPR strains individually or combination with humic acid for the management tomato wilt disease as well as its effect on growth parameters, fruit yield and quality.…”

Disease management of rose powdery mildew using some fungicides and biofungicides

“…Evaluation of disease severity on a scale from (0 -4) the severity of the disease was recorded on rose plants in each cultivars for 40 days, once every 10 days The plants were visually evaluated for powdery mildew resistance using a class scale:0 = no leaf lesions; 1 = 25% or less; 2 = 26-50%; 3 = 51-75%; and 4 = 76-100% of the mature leaf area covered by mildew, according to Linde et al (2006) with some modifications. was calculated using the following equation, according to Abdel-Kader et al (2012):…”

Biocontrol potential of endophytic <i>Trichoderma</i> sp. against the pathogenic fungus, <i>Alternaria alternata</i> that causes leaf spot in tomato plants

“…These illnesses include the root rot and leaf spot diseases of tomatoes, cucumbers, and peppers, which are brought on by a variety of fungi, such as A. alternata and Rhizoctonia solani. By promoting plant systemic resistance to Fusarium solani and Macrophmina phaseolina, the severity of infection with pathogenic fungus was reduced (Abdel-Kader et al, 2012). The amount of phenols in the plant may rise when Trichoderma sp.…”