POTENCY OF ORANGE PEEL AS A MOSQUITO FUMIGANT

The potency of orange peels of three species of orange were investigated using the randomised complete block design with four replicates. Statistically analysed results from this investigation showed that:. All Citrus peel treatments had significantly higher potency than the controls. For Citrus sinensis 2 and 3 h fumigations were significantly more potent than 1 h. For Citrus paradisi there was no significant effect of fumigation duration. For Citrus aurantifolia, 3 h fumigation was significantly more potent than 1 or 2 h. For 1 h fumigation, there was no significant effect produced for all the Citrus peels. For 2 h fumigation, C. sinensis and C. paradisi were significantly more potent than C. aurantifolia. For 3 h fumigation, C. sinensis were significantly more potent than C. paradisi and C. aurantifolia. It is therefore suggested that C. sinensis and C. paradisi form good substitutes for some brands of mosquito coil which contain unacceptably high levels of the toxic insecticide dicophone. © 1990.