Ecotoxicology:
Algae: LC
50 (72 h) for
Scenedesmus subspicatus 65.5 mg/l.Bees: LD
50 (24 h, contact) 0.25µg/bee.Birds:Acute oral LD
50 for quail (depending on carrier and sex) 118-480 mg tech./kg. Dietary LC
50 (14 d) for mallard ducks
c. 340, bobwhite quail
c. 300 50 (48 h) 0.36µg/l (soft water), 0.63µg/l (hard water).
50 (96 h) for carp 2.8-6.1, rainbow trout 0.48-1.14, bluegill sunfish 0.28 mg/l.Worms: LC
50 (14 d) for
Eisena foetida >1000 mg/ kg soil.Other beneficial spp.:'Afugan 30 EC' rated harmful to
Poecilus cupreus, Syrphus corollae, Chrysoperla carnea and
Aleochara bilineata; harmless to
Pardosa amentata (IOBC scheme).
Environmental fate:
Animals:Extensively metabolised and rapidly eliminated in rats, DT
50 4-5 h. Excretion mainly in urine; the most important metabolite is ethyl 2-hydroxy-5-methyl-6-pyrazolo[1,5-
a]pyrimidine-carboxylate, partly excreted as a sulfSoil:Soil degradation occurs by cleavage of the phosphoric acid group, saponification of the carboxylate fraction and further degradation of the heterocyclic ring system, ultimately to CO
2. Degradation rates vary with soil type and properties, with Plant:Half-life in wheat leaves
c. 19 d. Following hydrolysis of the phosphate bond, a
b-glucoside of the pyrazolopyrimidine is formed. WATER SOLUBILITY: 4.2 mg/l at 25°C