Impact of bio and organic soil amendments on sunflower damping-off and root-rot diseases under reclaimed soil

الملخص EN

Field experiment was carried out at El-Nubaria Province, El- Behaira Governorate to investigate the effect of some organic and biofertilization treatments as soil amendments on suppression Macrophomina phasolina, Sclerotium rolfisii, and Rhizoctonia solani, the causal pathogens of root-rot and damping-off of sunflower (Helianthus annuus L.).

Organic amendment treatments increased the sunflower resistance to soil borne diseases hence enhanced its productivity.

The most promising results obtained from rice straw+EM1+Urea, biochar+compost, rice straw+EM1 and EM-Bokashi with no significant differences, compost and animal manure, respectively compared to the control treatment (without organic amendment).

EM-X (EM1+Bacillus subtilis+mycorrhiza+Azotobacter sp.) was found to be more effective in reducing M.

phaseolina, S.

rolfisii, and R.

solani population and root-rot incidence, therefore enhance sunflower productivity compared to the other examined biofertilization treatments including the conventional chemical fertilization as the control treatment.

The integration between rice straw+EM1+Urea or biochar+compost and EM-X was found to be the furthermost advised agricultural practices for soil borne diseases management as land degradation neutrality (LDN) technology that enhances land cover and area unit productivity under these conditions.