Indoor Toxic Study of Several Plant Extracts on Red Imported Fire Ant

The effects of Six ethanol plant extracts,which mixed with peanut oil,corn flour and made baits for 2.0gDW/100ml,were tested on red imported fire ant(RIFA) indoor.The results showed that the toxic effects of Lantana Camara,fernland,aircraft grass,Wedelia trilobata ethanol extracts on RIFA were better in six plant extracts.The best toxicity effect was Lantana Camara,Wedelia trilobata extracts.The toxic effects of Lantana Camara was similer to Wedelia trilobata before 4 days,however,the toxic poison rate of the ethanol extract of Lantana Camara was more stronger than that Wedelia trilobata after 5 days.The adjusted mortality reached 100% after 8 days.The effects of different concentrations of extracts form Lantana Camara ethanol showed that with the increasing concentration,the adjusted mortality of Solenopsis invicta reduced gradually,and With the time of growth,the mortality rised gradually.Therefore,the ethanol extract of Lantana Camara had some contact action and repellency to red imported fire ants.