Three different relative humidity conditions, created by using saturated KCI and NaCI salt solutions and distilled water only as control, were used to study the preoviposition periods, oviposition pattern and the total number of eggs laid by three groups of engorged adult ovipositing Amblyomma variegatum female ticks. Relative humidities of 83% ±2, 72% ±2 and 95% ±2 were provided using saturated KCI and NaCI solutions and distilled water only respectively in desiccators throughout the period of experiment. Total mean number of eggs laid by the ticks under relative humidity conditions created by the KCI was 9,655, 10,583 for the NaCI and 5,074 for the distilled water. The mean preoviposition periods were 11 days for the KCI and 10 days for both the NaCI and distilled water only. The oviposition periods of 28 days were recorded for KCI and 24 days for both the NaCI and distilled water only. Under conditions of ready availability of materials and performance of the ticks, the saturated NaCI (hygroscopic type) solution appeared to provide the best favourable relative humidity conditions for the engorged adult ovipositing Amblyomma variegatum female tick.
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