EFFECT OF GROWTH RETARDANT CULTAR EFFECTS AGAINST OF BROAD BEAN ROOT ROT FUNGAL UNDER LATHHOUSE CONDITION

H. Al-Juboory, H.; S. Juber, K.

	EFFECT OF GROWTH RETARDANT CULTAR EFFECTS AGAINST OF BROAD BEAN ROOT ROT FUNGAL UNDER LATHHOUSE CONDITION
The Iraqi Journal of Agricultural Science
Article 1, Volume 43, Issue 0, 2013, Pages 114-122
Authors
H. H. Al-Juboory; K. S. Juber
Abstract
This study was carried out at College of Agriculture/University of Baghdad, to evaluate the activity of growth retardant cultar to protect of Broad bean (Vicia faba L.) against root rot fungi under lath canopy condition and determine its mechanism effect on both host and pathogen. Results showed that treating broad bean seeds with cultar at 25 mg/L confer a reasonable protection to the seeds against soil borne pathogens, Rhizoctonia solani, Fusarium solani, F. oxysporum, F. semitecum and combination of R solani, and F. solani. significant increasing of germination percentage and disease severity decreasing, as well as increasing of dry weights of both plant shoots and roots were achieved upon seed treat treatment with cultar compared with those from seeds contaminated with fungi alone. The germination percentage were found between 30-62.5% and disease severity between 26-39% on plants emerged from seeds treated with cultar compared to 22.5-57.5% on those emerged from seeds contaminated with fungi alone. The infection percentage of seeds socked in water was found to be 92.5 % and 85 % of those socked in cultar with disease severity between 37-56%. Cultar treatment induced significant increasing in shoots and roots dry weights compared with control (fungi alone). Anatomical studies of faba bean roots and stem treated with Cultar Showed an increase in thickness of epidermis and cell walls compared with untreated plants. Results also showed that the presence of pith in plant treated with cultar .Absence in untreated plants, as well as increase of xylem and phloem cells.

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