METHOD TO ASSESS TOXIC EFFECT OF PESTICIDES AT WATER OBJECTS Russian patent published in 2012 - IPC G01N33/18 

FIELD: ecology.

SUBSTANCE: during realisation of the method the test objects are soaked in tested solutions, parameters of test objects survivability are registered, and using them, threshold concentrations of tested pesticide toxicity are calculated, besides, pathomorphological modifications are registered in test objects, the average percentage of malformations is calculated, and the threshold concentration of teratogenic impact is established as the pesticide concentration with minimum teratogenic impact at test objects, and extent of pesticides toxicity is estimated on the basis of the threshold concentration coefficient, which is calculated using the formula K_n ^emb - coefficient of threshold concentrations of pesticides toxicity taking into account their teratogenicity, LC₁₆ - limit concentration of pesticides toxicity causing death of 16% embryos, E_terC₁₆ - threshold concentration of teratogenic effect of pesticides. At the same time if values of the coefficient K_n ^emb >10, the class of pesticides hazard is established as I, i.e. extremely hazardous, 5-10 - the class of pesticides hazard is set as II, i.e. highly hazardous, 1-5 - the class of pesticides hazard is established as III, i.e. hazardous, <1 - the class of pesticides hazard is IV, i.e. moderately hazardous. Test objects are embryos of sturgeons.

EFFECT: increased accuracy and validity of assessment.

2 cl, 1 ex, 6 tbl