Role of Elemental Sulfur and Copper Oxychloride against Damping- Off Disease of Faba Bean Caused by Fusarium solani.

Abstract

The efficacy of the organic fungicides elemental sulfur (S) and copper oxychloride (Cu) as well as a soil treatment Rhizobium leguminosarum were evaluated under laboratory, plastic houses and the field conditions, to control faba bean damping-off disease caused by Fusarium solani. Under laboratory conditions, the fungicides produced reduced mycelial growth of F. solani compared to R. leguminosarum as their effect was weak in reducing its growth. Under plastic houses and/or field conditions during (2015/2016 and 2016/2017) growing seasons, the faba bean plant was treated with the organic fungicides elemental sulfur at 500 ppm, copper oxychloride at 500 ppm (as a soil treatment) and / or seed packaging with R. leguminosarum, individually or combined. All treatments reduced the pre-and post-emergence damping-off, as well as increased the remaining plants, fresh & dry weight shoots and Nodulation of faba bean compared to the comparison treatment. In addition, under field condition, it caused a significant increase in the yield components for example (the number of pods per plant and total yield per Fed of both seasons. The combination of R. leguminosarum and the fungicide elemental sulfur was the best of these treatments compared to the other treatments.