Study On The Attraction And Toxicity Of Several New Baits To Red Imported Fire Ant(Solenopsis Invicta Buren)

Red imported fire ant(RIFA)Solenopsis invicta Buren,a native species in Parana River Basin valley of South America,is a significant dangerous invasive species.At present,RIFA have invaded more than ten provinces and regions in south China,such as Guangdong,Guangxi,Hainan and Fujian.RIFA is spreading in the invasion area,which seriously affects the public security and ecological environment of the invasion area.Chemical control is still the main measure to control RIFA.The development of new insecticides provides a guarantee for the continuous and effective control of RIFA.In this thesis,the feeding selectivity of RIFA to various baits was determined indoorally.The toxicity of various baits to RIFA and the foraging of toxic baits were evaluated.The foraging situation of RIFA on ham sausage after the treatment was determined,which laid a foundation for the development and application of new baits.The results were as follows: 1.The feeding selectivity of RIFA to baits.This study showed that there was no significant difference in the discovery time of RIFA for baits..From the point of attracting quantity,there is no significant difference between the amount of turpentine,thiamethoxam,nitenpyram and chlorfenapyr,and the number of attractants of the control drug-free baits.The amount of thiacloprid,thiamethoxam and nitenpyram baits is higher than the amount of chlorfenapyr.The inducing amount of cyanamide,ethiprole,dinotefuran,chlorfenapyr and clothianidin baits was less than that of the control group without baits.In terms of handling,0.2% thiacloprid,0.05% thiacloprid,0.2% cyanamide,0.1% cyanamide,0.05% cyanamide,0.2% ethiprole,0.1% ethiprole and The carrying amount of 0.05% ethionitrile baits was not different from that of the control group,and the handling amount of other baits was lower than that of the control group.2.The toxicity of baits to RIFA.In this experiment,the baits prepared with Brochlorfenapyr,chlorobromonitrile and cyanamide had better toxic effect on the workers,and the cumulative death rate of the workers could reach about 20% after 10 days.Thiamethoxam,thiamethoxam and furfuran had the second highest insecticidal activity against workers,and the cumulative mortality after 10 days was about 15%.Thiazoline,acetonitrile and dinitrifamide had the worst insecticidal activity against worker ants,and the cumulative mortality after 10 days was less than 10%.In the three compound baits,the compound baits of dinotefuran and thiacloprid,thiamethoxam and thiacloprid had better toxicity and the cumulative mortality rate at 10:10 and 3:7.Both can reach about 20%,and the cumulative mortality of clothianidin and thiacloprid compound baits 10 d is below 15%.3.The foraging behavior of RIFA on ham sausage after baits treatment.The study found that after 5 days,the Brochlorfenapyr,chlorfenapyr and acetonitrile baits can affect the time when the workers slow down the discovery of the ham and reach the peak of the foraging.Acetonitrile could affect the recruitment of workers.The foraging behavior of RIFA treated with baits of other agents on ham intestines was not different from that of the control group.After 10 days,the effects of chlorfenapyr,brochlorfenapyr and ethiprofen baits were reduced.In the total carrying amount of the ham sausage,there was no significant difference between the amount of the RIFA in the treatment of the ham and the amount of the control in the control group.4.Control effect of three baits on RIFA in field conditions.The study found that 0.2% cyanamide amide baits,0.1% cyanamide amide baits.0.05% cyanamide amide baits,1:9 thiamethoxam and thiacloprid baits,3:7 thiamethoxam and thiacloprid baits,5:5 thiamethoxam and thiacloprid baits,0.05% brochlorfenapyr The combined control effects of baits and 0.1% aphid baits were 38.61%,38.47%,44.79%,44.29%,37.70%,41.46%,61.62%,and 63.54%,respectively.The results of this thesis show that RIFA workers have good feeding selectivity to the cyanamide amide baits and the thiamethoxam and thiacloprid compound baits,and the two baits have better poisoning to RIFA workers.The activity is poor in field control.0.05% brochlorfenapyr has good insecticidal activity in the room and certain selectivity to RIFA.It has good control effect on RIFA in the field and can be made.The baits further explores the effect of usage on control effectiveness.