Keywords: 
• trifloxystrobin /
• environmental organism /
• acute toxicity /
• safety evaluation

Abstract: We have tested trifloxystrobin on 10 kinds of non-target organisms to evaluate its toxicity risk to environmental organisms. Test results showed that the 7 d-LD₅₀ of acute oral toxicity and 8 d-LC₅₀ of dietary toxicity on Coturnix coturnix japonica were >2.00×10³ mg a.i.·kg^-1 bw and >5.00×10³ mg a.i.·kg^-1 diet, respectively; 48 h-LD₅₀ of acute contact toxicity and oral toxicity on Apis mellifera L. were >100 μg a.i.·bee^-1 and >95.3 μg a.i.·bee^-1, respectively; 96 h-LC₅₀ of Bombyx mori was 1.61×10³ mg a.i.·L^-1; 14 d- LC₅₀ of Eisenia foetida was >100 mg a.i.·kg^-1 dry soil; 24 h-LR₅₀ of Trichogramma japonicum was 0.337 μg a.i.·cm^-2; 72 h-EC₅₀ of Pseudokirchneriella subcapitata was 5.80×10^-3 mg a.i.·L^-1; 48 h-EC₅₀ of Daphnia magna Straus was 1.72×10^-2 mg a.i.·L^-1; 96 h-LC₅₀ of Brachydanio rerio was 5.40×10^-2 mg a.i.·L^-1; 96 h-LC₅₀ of Xenopus laevis was 8.95×10^-2 mg a.i.·L^-1; the difference of 28 d nitrate transformation rate of soil microorganism was <25%. According to the pesticide virulence classification standard suggested by Chemical Pesticides Environmental Safety Evaluation Test Guidelines, the test results indicated that the trifloxystrobin is low toxic to terrestrial organisms (quail, honeybee, silkworm and earthworm) but highly or extremely toxic to aquatic organisms (alga, daphnia, fish and Xenopus laevis). It also can expose high risk to Trichogramma. When trifloyxteobin is deployed to farm fields, certain safety measures shall be taken to reduce its harm and risk to aquatic organisms and Trichogramma.