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 ...
IN reply to the queries raised by Mr. Beckley, I should like to record that the experiments described in my original letter were carried out merely to compare the toxicity and persistence of ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback