Preliminary Study On The Bioactivities Of Salsola Passerina Bunge

In this paper,the materials of Salsola passerine gathered from western ordos,were tested for their bioactivities on insect pests,pine wood nematode and plant pathogens. The results are as follows:Different concentration of 7 kind of crude extracts from Salsola passerine were selected for bioassay of action on Plutella xylostella.Resaults showed that,water extract,methanol extract,ethanol extract,acetone extract,ether acetate extract, methylene dichloride extract,and petroleum ether extract of S.passerine were tested,and showed evident antifeedant effects on the 3rd larvae of P.xylostella,when the concentration of the water extract,methanol extract,ethanol extract and acetone extract was 200 g.L^-1,the antifeedant rates on P.xylostella in choice tests was 100% in 48 hours,respectively;all 7 kind of extracts had evident effects of inhibiting oviposition on P.xylostella,especially,the oviposition deterrent rates of ethanol extract and acetone extract on P.xylostella in choice tests,with a concentration of 200 g·L^-1,were 100%in 24 hours;water extract and methanol extract showed some contact poison activity on the 3rd larvae of P.xylostella,while the other 5 kind of extracts had no evident contact poison activity against the larvae of P.xylostella;all 7 kind of extracts had no no stomach poison activity against the larvae of P.xylostella; the result also show that all the samples had no activity on eggs hatch rate of P.xylostella when the concentration were 10g·L^-1.Different concentration of crude extracts from Salsola passerine were selected for bioassay of action on Bursaphelenchus xylophilus(Bx)by the method of immersion.The results showed that,all 6 samples tested had some toxicity against Bx. Water extract and methanol extract showed the strongest toxicity against Bx.It indicated that the extracts of S.passerine contain some nematicidal thing.The bioactivities of 7 kinds of extracts from Salsola passerine on 13 plant pathogenic fungi were examined in laboratory.Resaults showed that,when the mass-concentration of S.passerine Maxim extracts was 100 g·L^-1,different extracts had complicated effects on different fungi tested.Some extracts had strong fungistasis effect on some species of fungi,some had a little fungistasis effect on some species, some had no effect on some species,while some had promotional effect on some species.