Fresh ripe healthy fruits of neem (Azadirachta indica) were
obtained from Rea Vipingo farm, Kilifi, North Coast. The
fruit pulp were removed and washed in clean tap water, shadedried
to a constant weight. The oil was pressed from de-husked
seed kernels using an oil expeller, sieved and filtered to
remove solid particles.
Lemon eucalyptus (Eucalyptus citriodora) oil was kindly
provided by BIOP Company Limited ready for formulation.
Crude oleoresin extract of Pyrethrum (Chrysanthemum
cinerariefolium) and Piperonyl butoxide (PBO) was kindly
donated by Pyrethrum Board of Kenya at Nakuru ready for
formulation