Studies On Biology, Ecology And Control Of Saccharosydne Procerus In Guiyang Region

Saccharosydne procerus is the pest species on Zizania aquatic thunb in Guiyang and Surroundings region,Biological and ecological characteristics,insecticidal experiment in laboratory,preliminary investigation of enemy on the two pests are studied in the dissertation.At the same time,the paper studied on the spatial pattern.In guizhou Province,the Farmer extensively plants to grow Zizania aquatic, which caused Saccharosydne procerus distribute abroadly in Guizhou Province.The Saccharosydne procerus have five generation every year in Guiyang,and overwintered as its egg;Its adult have polymorphism,oviposit in the Leaf's sheath.Larve have three stsdia,larve and adult like to stay on the con-side of leaf surface;adult need eating after eclosides;five to ten days later female adult and male adult will copulate and oviposit.The mouthpart tapy is piercing sucking mouthparts, Take Zizania aquatic aquatic juice liquid where in the center of leaf.So Saccharosydne procerus is the important pest species on Zizania aquatic.At constant temperatures of 15℃,18℃,21℃,24℃,27℃and30℃,The developmental time of Saccharosydne procerus in laboratory was studied.The results show that the pest can't oviposit following 15,the developmental time ofdecrease with temperature increasing from 15℃to 30℃,The developmental threshold temperature and the effective cumulative temperature of the generature are9.050℃and 394.5 day degree.The affections of temperature to the growth and development of Saccharosydne procerus,were probed,and constructed its experimental population life table,the death rate of lnd is the highest,24.87%.Grow a group of growths index number is 69.5.Insecticidal experiment with decis to control larvae of Saccharosydne procerus in laboratory was studied.The results show that corrected mortality declines with increase of diluted concentration:with 3000 times for 12 hour to handle of 1st larva,2nd larva,3rd larva and adult,3000 times is much higher than other times.The result is studied on the spatial pattern If the Saccharosydne procerus that belong to core pattern.