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Growth rate of Scenedesmus acutus in laboratory cultures exposed to diazinon

机译:暴露于二嗪农的实验室培养中的cut鱼场景生长速率

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The effects of the pesticide, diazinon on growth rate was examined in unialgal cultures of freshwater green algae,?Scenedesmus acutus?through 96 h acute toxicity tests.?S. acutus?was exposed to different concentrations of diazinon (1, 2, 4, 8, 16 and 32 μl) in the laboratory maintained at 23 ± 1°C and 16:8 light : dark regime. Cell numbers were determined daily and growth rates were calculated for a period of 4 days. The growth rate of?S. acutus?in the control cultures was higher at 0 to 4 days (40.000 to 276600 individuals), but the growth rate of the treated cultures with diazinon decreased at 2 to 4 days (28000 to 10320 individuals). The?results demonstrated adverse effects of?diazinon?on freshwater green algae (S. acutus). Thus, the application of this pesticide for pest control in agriculture must be done carefully since any disturbance affecting algae with similar or higher sensitivity will have severe repercussions on higher trophic levels.
机译:通过96 h急性毒性试验,在淡水绿藻的单藻培养物中研究了农药二嗪农对生长速率的影响。在实验室温度保持在23±1°C和16:8光照:黑暗条件下,鱼被暴露于不同浓度的二嗪农(1、2、4、8、16和32μl)。每天确定细胞数,并计算4天的生长速率。 ?S的增长率。对照培养物中鱼的生长在0至4天时较高(40.000至276600个个体),但处理过的二嗪农培养物的生长速率在2至4天时有所下降(28000至10320个个体)。结果表明“重氮”对淡水绿藻(S. acutus)的不利影响。因此,必须谨慎地将这种农药用于农业害虫防治,因为任何影响藻类的干扰具有相似或更高的敏感性,都会对较高的营养水平产生严重影响。

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