Chemistry and Fate of Simazine

摘要: Simazine (6-chloro-N,N’-diethyl-1,3,5-triazine-2,4-diamine) was first introduced in 1956 by the Swiss company J.R. Geigy (Cremlyn 1990). It has been widely used for preemergence control of broadleaf weeds and annual grasses both agricultural noncrop fields. For example, California it 28th most pesticide 2003 (306,100 kg), with applications primarily on fruit vegetable crops (CDPR 2003a,b). is also as an algicide fish farm ponds, aquariums, cooling towers. However, toxic to some aquatic animals. Sanders (1969) found that at 22°C 50% lethal concentration (LC50) simazine macrocrustacean amphipod Gammarus lacustris 30, 21, 13mg/L after 24-, 48-, 96-hr exposures, respectively. Also, effect herbicide water snail (Lymnea stagnalis) such a 2 mg/L all embryos were destroyed within 9d; (50% effective dose) ED50 being 0.02mg/L (Kosanke et al. 1988).