§ Mr. Turton
asked the Secretary of State for Education and Science what inquiries he is making into the carcinogenic effect of maleic hydrazide when sprayed on tobacco leaf; and if he will make a statement.
§ Mrs. Shirley Williams
Some years ago a series of investigations was carried out by Medical Research Council staff and associated workers from which it was concluded that maleic hydrazide was not carcinogenic. The Council are aware that this finding has recently been questioned and the matter will be followed up as necessary.