The Study Of Biological Activity Of Extract Of Poisonous Plants On Changbai Mountain To The Inhabitation Of Plants Pathogen

The hypha of 14 kinds of plant pathogen fungi growth rate were tested usingCorydalis chloroform, Pulsatilla chloroform and Pulsatilla butanol in the lab. theresult showed: Antifungal activity degree were Corydalis chloroform＞Pulsatillachloroform＞Pulsatilla butanol. All the medicaments have the best of restrain effectto the Coniella diplodiella (Speg.) Petrak&Sydow, and the inhibition rate was100.00% in the 200 mg/L of the Corydalis chloroform, and the inhibition rate was100.00% to Bipolaris maydis and Curvularia lunata Boed in the 600 mg/L, the EC₅₀were 48.92mg/L and 63.95mg/L.the three kinds of medicament have the worseinhibition rates to the Fusarium.The spore germination tests showed: the best restrain effect to all the pathogenewas Corydalis chloroform, the inhibition rate were 100% under the 250 mg/L to theBipolaris maydis and Coniella diplodiella (Speg.) Petrak&Sydow; Pulsatillachloroform and Pulsatilla butanol have lower inhibition rates to all the pathogeneexcept to Coniella diplodiella (Speg.)Petrak&Sydow.The trial of potted-culture plant showed: the Corydalis chloroform had more than60.00% control efficiency on Bipolaris maydis and Curvularia lunata Boed, Pulsatillachloroform had more than 60.00% control efficiency on Bipolaris maydis, the controlefficiency of Pulsatilla butanol to all the provide plant were under 50.00%. furthermore,5-Bromomethyl-2(5H)-Furanone was forebody of Protoanemonin that was tested to the 6 kinds ofthe hypha of plant pathogene fungus. the results showed: 5-Bromomethyl-2(5H)-Furanone hadhigher inhibition rate. It had inhibition ratewas 100.00% at concentration of 1000 mg/L and 500mg/L to in all the provide pathogene. It had highest inhibition rate to Sclerotiniasclerotiorum(Lib.) de Bary, the EC₅₀ was 26.81mg/L. when the concentration to arrive15.625mg/L the inhibition rate cut down to 20.00% to others pathogene.