TOXICIDAD DEL FUNGICIDA KRESOXIM - METIL SOBRE SIETE BIOINDICADORES DE CALIDAD AMBIENTAL

Abstract

Kresoxim-methyl is a fungicide of the strobilurin group known to affect aquatic and terrestrial environments. The objective of this work was to determine the toxicity of Kresoxim-methyl on seven bioindicators of environmental quality. Ecotoxicological bioassays were performed with the seven models using standardized protocols. Kresoxim-methyl affected the mortality of Artemia franciscana was-1 58 mg ai·L at 48 h of exposure. In Carassius auratus at 26 days, was observed that the mortality was-1-1 affected at the concentration 0.067 mg ai·L , hatching was altered at 0.134 mg ai·L as well as in surviving-1 fish weights and length of surviving fish was observed effect at the highest concentration at 0.26 mg ai·L. There was no effect on the number of deformed larvae and finally the percentage of juveniles of C. auratus-1 with abnormal behavior was affected in the highest concentration 0.26 mg ai·L. Chlorella vulgaris-1-1 showed a growth inhibitory effect at 96 h with CL > 0.12 x 10 mg ai·L. No effect of Kresoxim-methyl 50 on the mortality of Chrysoperla externa and in the inhibition of nitrates in microbial communities of soil-1 were observed. In Daphnia magna the CL mortality was 1.04 mg ai·L at 48 h of exposure. In Poecilia 50-1 reticulata the CL at 96 h was 6.51 mg ai·L. Kresoxim-methyl is more harmful to aquatic than to the 50 terrestrial environments.