CHEMICAL AND BIOLOGICAL CONTROL OF BEAN DAMBING – OFF AND ROOT – ROT CAUSED BY RHIZOCTONIA.SOLANI

Yahya Muhammed, Suad

doi:10.33899/magrj.2012.60617

	CHEMICAL AND BIOLOGICAL CONTROL OF BEAN DAMBING – OFF AND ROOT – ROT CAUSED BY RHIZOCTONIA.SOLANI
Mesopotamia Journal of Agriculture
Article 23, Volume 40, Issue 4, 2012, Pages 206-216 PDF (0 K)
DOI: 10.33899/magrj.2012.60617
Author
Suad Yahya Muhammed
Abstract
Isolation results from beans showed the presence of the fungus R.solani . It is also shown that the degree of parasitism and antagonism of the two biological control agents (BCA) T.viride . T.harzianum was significant . It was clear from the study of the effect of tumiating used in the laboratory that the fungicide benlate gave the highest percentage inhibition % 100 at the cocentration of 100 . 200 mlg/liter . followed by the fungicide dividend 65 – 9 % at the concentration of 200 mlg/liter . (BCA) significantly differ as far as the disease severity (0.25 . 0.38 zespectively) and effect of the two fungicides on the percentage of infection pre-and post emergency are concerned . It is obvious that the treatment of the fungicide benlate alone gave the lowest percentage of infection than the fungicide dividend alone pre and post emergence (33.3 . 6.6 % respectively) . The percentage of infection Pre and Post emergence at the treatment of the fungicide devidind alone (0.40 and 13.3 respectively). From the effect of the (BCA) on some studied characteristics of the plant it was clear that the (BCA.) T.harizianum and T.viride were not significantly different in the length of the shoot and root . the dry and wet weight of the shoot and they significantly differed in the wet and dry weight of the root . They also differed from the control treatment (contaminated soil)

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