Record ID No. |
3993 |
Author(s) |
Khalifa, M. M. A.; Mahmoud, E. Y.; Ibrahim, M. M. , 2012 |
Affiliation |
Plant Pathology Res. Ins., Agric. Res. Center, Giza, Egypt, email: mamdouh_khalifa2003@yahoo.com |
Title |
Integration of mycorrhiza and calcium treatments for suppression of onion white rot disease |
Source. Vol.(no):Page |
Research Journal of Agriculture & Biological Sciences, 8(5): 395-406p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biological Interaction |
Sub-subjects |
Pathogens |
Host |
Allium cepa (Onion) |
Organism |
Sclerotium cepivorum, Glomus macrocarpum, Arbuscular Mycorrhiza (AM) |
Country |
Egypt, Afrfica |
Abstracts |
Using AM fungus, Glomus macrocarpum, when inoculated in combinations with different rates of calcium chloride as dipping treatment and/or gypsum as soil treatment were significantly effective for reducing incidence onion white rot disease caused by Sclerotium cepivorum, under artificially and naturally conditions in greenhouse and field trials, respectively compared with untreated control. Also, treatments increased fresh and dry weight under greenhouse conditions as well as increased onion bulb yield in field trials. The superior treatments were obtained by combined treatments of AM and gypsum at 1.0 and/or 1.5 ton/fed. with calcium chloride at 4% and 2% which gave the highest reduction of white rot disease incidence under greenhouse and field trials during the two growing seasons. Pectolytic enzyme activity of both polygalacturonase (PG) and pectin methylestrase (PME) in onion plant tissue resulted from the tested treatments under artificially conditions were significantly decreased by different treatments of AM, gypsum and calcium chloride. Integration of gypsum, calcium chloride and AM gave the maximum performance of AM root infection percent and number of their spores in soil more than without AM in natural soil as well as increase total calcium (Ca++) concentration in plant and soil. |