Bioactivity of three Cyanobacterial blooms against Culex pipens molestus (Diptera: Culiciday).
Abstract
The cyanobacteria (blue - green algae) were isolated and screened from the aquatic habitates of the Culex pipiens molestus. The algae; Nostoc commune Osallatoria tenuis and Lyngbya alementaria have activity on the immature stages with the concentrations 0.25, 0.05, 0.75 and 1.0µg/ml of N. commune. The suspension bloom of O. tenius induced malformations began with 23.3 and 11.7 present at 0.25µg/ml until 83.3 and 93.3% for larvae and pupae, at the concentrations 0.25 and 1.0µ/g/ml respectively. The cyanobacterium L. alementaria specific with the life cycle extension of larva and pupa starts with 0.5µg/ml (18.2 and 3.0 days) and proportionally exceeded to 30.5 and 4.7days at 1.0 µg/ml in comparison with 13.3 and 1.8 days for control
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