Author:
Ahmed M. F. A.,Mikhail Sherin P. H.,Shaheen S. I.
Abstract
AbstractThis investigation was carried out on commercial organic field in the Fayoum Governorate of Egypt under conditions of natural infection, 2020/2021 and 2021/2022 to evaluate the effectiveness of four commercial biocides—Blight Stop (Trichoderma harzianum), Bio Zeid (T. album), Root Guard (Bacillus subtilis), and Bio ARC (B. megaterium)—as well as, four biocontrol agents (T. harzianum, T. album, B. subtilis, and B. megaterium) in controling Cercospora beticola Sacc, the main causal of Cercospra leaf spot (CLS) disease on sugar beet in an organic farming systems. All biocontrol agents and commercial biocides sprayed at the recommended dose in a two spray regime with 15 days between sprays, were significantly reduced Cercospora beticola, total amino acid and juice impurities (K, Na and α-a N %) in comparison to control treatment. All bioagents and biocides put to the test resulted in a significant rise in phenolic compound values, total chlorophyll, sucrose (%), purity (%), root, top and sugar yield quality of sugar beet during both seasons. Spraying Blight Stop was the most effective treatment followed by T. harzianum. B. megaterium was the least effective biocide treatment compared with the control treatment during the two growing seasons.
Funder
Agricultural Research Center
Publisher
Springer Science and Business Media LLC
Subject
Horticulture,Plant Science,Agronomy and Crop Science
Reference48 articles.
1. Ahmed, M. F. A. (2005). Effect of Adding Some Biocontrol Agents on Non-target Microorganisms in Root Diseases Infecting Soybean and Broad bean Plants. M.Sc. Thesis. Fac. Agric., Moshtohor, Benha Univ., 137 p.
2. Ahmed, M. F. A. (2013). Studies on Non-chemical Methods to Control Some Soil-Borne Fungal Diseases of Bean Plants Phaseolus vulgaris L. Ph.D. Thesis. Fac. Agric., Cairo Univ., pp: 137.
3. Alexopoulos, C. J., Mims, C. W., & Blackwell, M. (1996). Introductory mycology (4th ed., p. 889p). John willey and Sons.
4. Amer, M., Aiad, M., Rashed, S., & El-Ramady, H. (2019). Sustainable Irrigation and Fertilization Management of Successive Cultivated Sugar Beet and Cotton under Salt-affected Soil Conditions. Env. Biodiv. Soil Security, 3, 227–239.
5. Bargabus, R. L., Zidack, N. K., Sherwood, J. E., & Jacobsen, B. J. (2002). Characterization of systemic resistance in sugar beet elicited by a non-pathogenic, phyllosphere-colonizing Bacillus mycoides, biological control agent. Physiological and Molecular Plant Pathology, 61, 289–298.