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The effect of pesticides on the growth of green and blue green algae cultures

The effect of pesticides on the growth of green and blue green algae cultures

Acta Hydrobiologica 23(2): 155-172

The sensitivity of 9 green algae, Chlorella pyrenoidosa, C. mucosa, Ankistrodesmus minutissimus, Chlorococcum sp., Dictyosphaerium pulchellum, Scenedesmus acutus, S. quadricauda, Hormidium flaccidum and Stichococcus sp., and 3 blue-green algae: Anabaena variabilis, Spirulina platensis and Oscillatoria sp. to 9 pesticides: TCA [trichloroacetic acid], 2,4-D acid, monuron, diuron, simazine, atrazine, p-naphthoquinone, DDT and methoxychlor was determined on the basis of growth kinetics and the criterion of LC50 (50% growth inhibition). The LC50 values of 0.15-24 .mu.g .cntdot. dm-3 denote the species sensitive to 2,4-D and urea- and triazine-derivative herbicides; the values of 40-50 .mu.g .cntdot. dm-3 characterize the species sensitive to p-naphthoquinone while those within 0.3-0.9 mg .cntdot. dm-3 determine the species sensitive to TCA, DDT and methoxychlor.

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