Exploitation of some plant extracts for ecofriendly management of Net Blotch of Barley (original) (raw)

The antifungal activity of ten plants extracts was tested in controlling Pyrenophora teres the causal organism of net blotch of Barley in vitro and in vi vo. Effects of the aqueous extracts varied dependin g o concentrations. In in vitro study the aqueous extra cts of Anacyclus valentinus and Tetraclinis articul ate at 1500 ppm caused highest reduction of mycelia gro wth of P.teres(72.27 and 87.05 % respectively), while extracts of Mentha pepirita and Foeniculum vu lgare caused the lowest inhibition of the pathogen. In in vivo experiments the plants extracts were tes ted for their preventive and curative efficacy agai nst net blotch. Barley plants were treated either aqueo us extracts 1 day before or2 days after artificial inoculation. The highest reduction of diseases seve rity was achieved by the extract of Tetraclinis articulata. The same extracts were then tested as s eed treatments, against seed-borne fungi. The best control against barley seed mycoflora was obtained with the e...