EFFICIENCY OF SOME PLANT EXTRACTS, NATURAL OILS, BIOFUNGICIDES AND FUNGICIDES AGAINST ROOT ROT DISEASE OF DATE PALM M.A. Baraka*, Fatma M. Radwan**, W.I. Shaban* and K.H. Arafat** Journal * Faculty of Agriculture, Suez Canal University, Ismailia, Egypt. J. Biol. Chem. Environ. Sci., 2011, ** Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt. Vol.6(2): 405-429 www.acepsag.org ABSTRACT Several soilborne fungi were isolated from root rots of date palm trees and offshoots, including: Fusarium oxysporum, F. moniliforme, F. solani, Thilaviopsis paradoxa, Botryodiplodia theobromae and Rhizoctonia solani. In vitro testing, the efficacy of plant extract Marjoram at 100% was the most effective against pathogenic fungi, while garlic as essential oil at 500 ppm and jojoba as fixed oil at 500 ppm were the most effective against pathogenic fungi. Plant-Guard at 3.5 ml/L was the most effective against pathogenic fungi. Topsin M70 was the most effective against pathogenic fungi in vitro. In greenhouse Topsin M70 was the most effective to decreased root rot of date palm. Key Words: Date palm, soil borne fungi, root rot, plant extracts, essential oils, fixed oils, biofungicides, fungicides. INTRODUCTION The most important pathogens of root rot (decline) disease in date palm trees and offshoots (Phoenix dactylifera L.) were Fusarium oxysporum; F. solani; F. moniliforme; F. equiseti; Phoma sp..; Alternaria sp.; Cladosporium sp.; Macrophomina phaseolina; Thielaviopsis paradoxa; Diplodia phoenicum; Phomopsis phoenicola, F. semitectium, Rhizoctonia solani and Chaetomium sp. (El- Deeb et