In the study, the variations of biomass and biological magnification of the parathione and diazinon in Persicaria thunbergii cultured with the nutrient solutions added by the pesticides for 35 days were investigated. The results are as follows : The a...
In the study, the variations of biomass and biological magnification of the parathione and diazinon in Persicaria thunbergii cultured with the nutrient solutions added by the pesticides for 35 days were investigated. The results are as follows : The amount of the biological magnification of parathione and diazinon in the plant were reached to the highest values at 14 days, and then gradually declined. The biological magnifications of the plants treated with 5ppm, 10ppm and 20ppm of parathione were higher than those of diazinon by 1.27-5.92, 1.87-6.23 and 1.77-9.52 times, respectively. The biomass of the plants were declined as the growth times in which the pesticides were concentrated : those of the plants treated with 5, 10 and 20ppm of parathione were 0.81, 0.75 and 0.65 of the control, while those of diazinon were 0.96, 0.95 and 0.80 of the control, respectively.