PYRETHRUM EXTRACT - To guard against infestations of cockroaches, block cracks with papier mache, wood filler or plaster. Spray pyrethrum extract liberally around the joins between the skirting board and the floor, and anywhere else that you supect the cockroaches emerge from.
Cockroaches are nocturnal, so it is best to carry out eradication treatments at night when the roaches emerge from their nests.
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