CONTROL OF FUSARIUM ROOT ROT DISEASE ON MANDARIN BY SOIL AMENDMENT WITH TRICHODERMA HARZ/ANUM GROWN ON BAGASSE (SUGAR CANE WASTE) | ||||
| Journal of Plant Production | ||||
| Article 2, Volume 29, Issue 1, January 2004, Page 83-95 PDF (175.45 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238467 | ||||
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| Author | ||||
| R. S. R. EI -Mohamedy , | ||||
| Dept. of Plant Pathology, National Research Center, Dokki , Giza , Egypt | ||||
| Abstract | ||||
| Soil amendment with bioenhanced bagasse (bagasse colonized by Trichoderma harzjanum). enhanced bagasse. T. harzienum. Topsin-M and biocnhanced bagasse + Topsin-M for controlling Fusarium root rot disease on mandarin under green house and field conditions was studied. In vitro. amended Dox medium with 2.5 and 5.0% (w/v) of powdered bagasse resulted in enhancement the antagonistic of T. harzianum ability against F. solani and increased chitinase and cellulase activities of T. harzianum compared with control (un amended medium). In green house. Fusarium root rot disease incidence on mandarin seedlings was high significantly reduced when bioenhanced bagasse, bioenhanced bagasse + Topsin-M (0.5 gIL) and Topsin-M (1 gIL) treatments were dilervied into artificially infested soil as twice soil applications compared with control treatment. Moreover. such treatments caused high reduction on population density of Fusarium propagules in rhizosphere soil. but Trichoderma propagules counts were highly increased. Under field conditions amended s oil a round stems 0 f diseased mandarin trees by b ioenhanced bagasse. bioenhanced bagasse + Topsin-M and Topsin-M as twice application per season results in recovering great number of diseased trees and decreased the disease severity on others. Population density of Fusarium sp < /em>p. were highly decreased. where population density of Trichoderma spp were increased in rhizosphere soil of trees that treated by bioenhanced bagasse alone or in combined with Topsin-M. Such treatments caused increased fruit yield by 130.2 and 116.3% compared with 67.4% of Topsin-M treatment. It could be suggested that using soil amendments such bagasse colonized by T. tietzienum alone or in combined with a reduced rates of fungicides for controlling root rot pathogens on citrus can be success fully used replacing traditional fungicides and avoid environmental pollution. | ||||
| Keywords | ||||
| Citrus; Soil amendment; Root rot; Control; Sio agent; Mandarin | ||||
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