INFLUENCES OF AQUATIC PLANTS ON THE FATE OF THE PYRETHROID INSECTICIDE LAMBDA-CYHALOTHRIN IN AQUATIC ENVIRONMENTS

摘要

Aquatic exposure assessments for pesticides are generally based on laboratory studies performed in water alone or water-sediment systems. Although aquatic macrophytes, which include an variety of bryophytes, macroalgae, and angiosperms, can be a significant component of many aquatic ecosystems, their impact on pesticide fate is generally not included in exposure assessments. To investigate the influence of aquatic plants on the fate and behavior of the pyrethroid insecticide lambda(λ) cyhalothrin, two laboratory experiments(to assess adsorption and degradation)and an indoor microcosm study (to assess fate under semirealistic conditions)were conducted.