Effect of oregano water on Pythium density in soil and damping-off disease on bean plants

Pythium genus includes significant and destructive soil borne plant pathogens causing losses on many plants, especially by root rot damping-off diseases. Like other pathogens, control of the diseases caused this group is rather difficult. Usually fungicides are used against species, but investigations alternative methods chemicals gained importance because harmful effects pesticides human health environment. Plant extracts essential oils among safer chemicals. Since oregano oil has high fungitoxic effect even in low concentrations, water, by-product oil, was investigated study P. deliense, one most common virulent species Turkey. Oregano water obtained from Origanum onites, diluted with distilled 100, 80, 60, 40, 20, 10 5% rates applied to its deliense population density severity disease bean plants pathogen were determined. As a result, all solutions containing over 10% rate significantly decreased populations samples taken every three days after applications, least undiluted water. Similarly, increased emergence seedlings hypocotyl suppressing pathogen. In addition, application supported shoot development decreasing negative growth. This showed that an effective related disease.