Evaluation the Activities of Wood Vinegar and some Commercial Bio- Products in Management of Soil-Borne Fungi of Two Tagetes Varieties

Document Type : Original Article

Authors

Plant Pathology Research Institute, Agricultural Research Center, 12619, Giza, Egypt.

Abstract

In Egypt, ornamental and medicinal marigold (Tagetes minuta) and (Tagetes erecta) plants suffer high yield losses due to damping off and root rot diseases. During surveys conducted in Beni-Suef governorate in 2021 and 2022 seasons, these important diseases were observed. The most frequently occurring fungi in isolation trials from diseased samples were Alternaria alternata (Fr.) Keissler., Fusarium oxysporum Schlecht., Fusarium semitectum Berk. & Rav., Fusarium solani (Mart.) Sacc., Rhizoctonia solani Kühn, Sclerotinia sclerotiorum (Lib.) de Bary and the fungal-like organism, Pythium splendens Braun. Fusarium oxysporum was more virulent than the other fungi in pathogenicity tests on the two tested Tagetes varieties, i.e., Minuta and Erecta. The effect of Bio-Cure B, Bio-Cure F, Rhizo-N, Topsin-M 70, Vitavax 200 and wood vinegar (WV) on the two tested Tagetes varieties and the incidence of damping off and root rot diseases was determined under in vitro and in vivo. These controlling agents, however, varied in their positive efficiency against diseases. The most effective treatments for controlling these diseases and enhancing plant development parameters were fungicides followed by wood vinegar (WV). All tested treatments significantly reduced the percentages of infection and increased growth parameters in field experiments compared to control treatment.

Keywords

Egyptian Journal of Phytopathology
Volume 50, Issue 2
December 2022
Pages 104-123

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