A natural contact insecticide of low persistence, extracted from Derris, Lonchocarpus, Cube, Tephrosia. Usage limited to individuals and amateur gardeners; also used against ectoparasites on domestic animals and pets.


[affected.gif] Animals most affected
Fish, dogs.


[etiology.gif] Etiology
Contamination of stretches of water (ponds, aquaria) used for fish rearing. Direct ingestion of the agrochemical product.


[toxic.gif] Toxicity
Extremely toxic to fish.

Oral doses in mg/kg or in concentrations in mg/l:

LD50 rats 132
TD dogs 50
  chickens 1000
LC50 (96 h) fish 0.01



[clinical.gif] Clinical features
Predominantly neurological (CNS) in origin:


Death due to asphyxia.


[lesions.gif] Lesions
Non-specific.


[treatm~1.gif] Treatment
Antidote (recommended by some vets):


Symptomatic treatment, and to promote excretion:



[labinv~1.gif] Laboratory investigations
The compound degrades too rapidly to be detected in clinical practice.