[The toxicological characteristics of Gastrofenzin. III. Its chronic oral toxicity].

A risk evaluation has been carried out under conditions of chronic three-month experiment in oral application of Gastrofenzin in doses 1/20, 1/100 and 1/200 LD50 for male and female white rats, respectively 33.2 and 43.8; 6.

[The toxicological characteristics of Gastrofenzin. II. Its subacute oral toxicity].

The subacute (30 day) oral toxicity of Gastrofenzin has been investigated in white rats "Wistar" of both sexes, treated with 0.7 and 33 mg.kg-1 for the male and 0.

Why different regulatory decisions when the scientific information base is similar?--Human risk assessment.

The main objective of this analysis has been to characterize the role of science, in a broad sense, in relation to social, economical, political, and other factors in explaining why regulatory decisions vary in different countries, although they are based on more or less identical scientific data. Eleven countries from different geographical areas and with varying cultural background have provided information in response to an extensive questionnaire aimed at identifying procedures for registration, restricting, or banning registration for certain selected pesticides. Although many of these responses lacked sufficient detail in certain aspects, together with other documentary sources they nonetheless provided insight with respect to some of the main concerns among and between nations regarding decisions in pesticide management.

Comparative study on the effects of five benzoylphenylurea insecticides on haematological parameters in rats.

Five benzoylphenylurea insecticides were administered to male Wistar rats for 28 days at oral doses of 100 mg kg-1 each. Elevation of methaemoglobin was found only in the diflubenzuron- and triflumuron treated groups. The number of reticulocytes was increased in all of the treated groups.