An efficient technique for laboratory rearing of Simulium verecundum S. &J. (Diptera: Simuliidae)

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Abstract
A series of 10 similar rearing vessels, each containing 500 ml of water circulated by a rotating magnetic stirring bar, was used to rear cohorts of 50 first instar S. verecundum larvae to adults. Ground Tetra tropical fish meal was used as food. The culture water was replaced daily to remove toxic nitrogenous products excreted by the larvae. In 3 experiments, the mean (.+-. s.hivin.x) survival rates were 71.60 .+-. 3.19%, 81.73 .+-. 2.78% and 66.60 .+-. 2.60%; larval development was reasonably synchronous and the median periods required for growth from 1st instar to adult were 25, 22 and 21 days.