Synthetic phytohormones, phenoxy derivatives of fatty acids used as herbicides.


[affected.gif] Animals most affected
Dogs, cattle, (other animals).

Compounds in this category
2,4-D, 2,4-DB, 2,4-MCPA, 2,4-MCPB,
2,4,5-T, dichlorprop, fenoprop, mecoprop.


[etiology.gif] Etiology
Very widely used translocated selective herbicides; used for the control of weeds in cereal crops, grasslands and meadows, and to clear undergrowth. Available in the form of concentrated emulsions or soluble concentrates for dilution in water.
Poisoning can occur for one of two reasons:
Direct poisoning: through accidental ingestion of the agrochemical product itself; recently treated vegetation, however, is of low toxicity and when the compound is applied according to the manufacturers' instructions, it is not considered to be harmful to animals.
Indirect poisoning: by ingestion of toxic plants which have been treated with phenoxy acids. This unusual situation arises because:



[toxic.gif] Toxicity
Generally of low toxicity; for specific information see individual compounds. Practically non-toxic to fish.


[clinical.gif] Clinical features
In ruminants

In dogs


[lesions.gif] Lesions
Non-specific:




[treatm~1.gif] Treatment
No antidote. Symptomatic care only, promote excretion:



[labinv~1.gif] Laboratory investigations