Dar es Salaam — Pyrethrum exports from Tanzania climbed by 15 per cent during the 2018/2019 season following improved production. Exports rose to Sh15 billion, up from Sh13 billion in the previous ...
IT is well known that both light and air rapidly destroy the pyrethrins, therefore to obtain a true picture of the relative persistence of pyrethrins and the gamma isomer of benzene hexachloride as a ...
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