Ecological Assessment of Storm Impacts

Data Collection

Biotrol 4K

Basic Information

Synonym(s): Acrobe; B 401; Bacillus thuringiensis; Bacillus thuringiensis berliner; Bactimos; Bactis; Berliner; Dipel; Foray; Gnatrol; Javelin; Thuricide; Vectobac
Formula: No molecular formula available
Contaminant Type: Biotrol 4K is an insecticide.
Additional Information: The highest dose tested was 6.7 x 10^11 spores per animal. The results of these tests suggest that the use of B.t. products causes few, if any, negative effects. B.t. was not acutely toxic in tests conducted on birds, dogs, guinea pigs, mice, rats, and humans. ^h

Half-Life (in soil unless otherwise noted)

• t1/2: 4 months ^h
  Environment: In suitable conditions
  Notes: B.t. is a naturally-occurring pathogen that readily breaks down in the environment. Due to its short biological half-life and its specificity, B.t. is less likely than chemical pesticides to cause field resistance in target insects. B.t. is moderately persistent in soil. B.t. spores are released into the soil from decomposing dead insects after they have been killed by it. B.t. is rapidly inactivated in soils that have a pH below 5.1. Microbial pesticides such as B.t. are classified as immobile because they do not move, or leach, with groundwater. Because of their rapid biological breakdown and low toxicity, they pose no threat to groundwater.

Toxicity Effects

• Organism Type: Birds ^h
  Common Name: Quail
  Scientific Name: Phasianidae (Family)
  Toxicity: >10000 mg/kg
  Test: LD50
  

• Organism Type: Fish ^h
  Common Name: Rainbow trout
  Scientific Name: Oncorhynchus mykiss
  Toxicity: 560 and 1000 mg/l
  Test: 96h NOEC
  

• Organism Type: Mammals ^h
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: >13000 mg/kg
  Test: LD50
  Formulation: Thuricide
  

• Organism Type: Mammals ^h
  Common Name: Rat
  Scientific Name: Muridae (Family)
  Toxicity: >5000 mg/kg
  Test: LD50
  Formulation: Javelin
  

Work Cited