FIG. 4.
Third efficacy study of the effect of anthraquinone-59 on the abundance of O. perornata (A), R. brookii (B), Cylindrospermopsis spp. (C), O. geminata (D), O. agardhii (E), Microcystis spp. (F), green algae (G), and diatoms (H) in pond water. Each point is the mean ± standard deviation of the mean of measurements in six replicate limnocorrals. Means on the same day with the same letter are not significantly different (P ≤ 0.05) based upon LSD values. Symbols: •, controls; ○, 0.3 μM anthraquinone-59.