Effect of Tea and Powder Compost on Control of Root Rot Disease Severity, Enzyme Activity, Seeds Chemical Components and Yield of Soybean under Greenhouse and Field Conditions.

This study aimied to stody the effect of tea and powder compost on controlling root rot disease of soybean. the obtained results from the effect of compost powder and compost tea at different levels on damping off%, fresh and dry weight of shoot and root (g), length of soybean plants (cm), and enzymatic activity under greenhouse (artificial inoculation) and field (natural infection) conditions indicated that :under greenhouse condition, using of compost powder at level of 10 g/pot and using of compost tea at level of 100% (v/v) were the most effective on decreasing damping off as well as increasing seed germination %, increasing of fresh and dry weight of shoot and root, increasing of plant length (cm) and increasing of polyphenl oxidase and peroxidase activity. while, using of compost powder at level of 8 g and 6 g/pot or using of compost tea at level of 50% and 25% (v:v) gave least effect on tested characters which mentioned above. on the other hand, and under field condition, the obtained results cleared that, the compost powder at high level (12 tons/feddan) and the compost tea at 100% (v:v) concentration obtained the highest effect on decreasing pre and post emergence damping off% as well as germination percentage, decreasing disease severity, and gave also the highest effect on increasing yield per plot (kg), weight of 100 seeds, polyphenol oxidase and peeroxidase activity, protein and oil content %, followed by the compost powder at level of 10 ton/feddan and compost tea at level of 50% (v:v), comparing with control treatment.