Lowering the risk of secondary poisoning with Cholecalciferol based rodenticide?

Asked September 20, 2017, 11:09 AM EDT

Hello, I’m trying to develop an IPM program for a couple farm sites. Have you heard of Terad3 Blox rodenticide? The active ingredient is Cholecalciferol, the biologically active form of vitamin D, and is supposed be low risk for secondary poisoning in birds. Rodenticide is our best option for managing voles that overwinter in our hoop houses. "Cholecalciferol is completely nontoxic in small amounts, but massive single doses or prolonged low level exposure can prove toxic. Ingestion of excessive amounts of cholecalciferol induces hypercalcemia (elevated blood calcium levels), which ultimately results in heart problems and kidney failure." http://saferodentcontrol.org/site/problems-with-rodenticides/ Thanks, Caroline Hooks

Charles County Maryland ipm

1 Response

Hi Caroline,

Yes, cholecalciferol is listed as having a low secondary risk to birds. The National Pesticide Information Center has a good page on rodenticides and is a comprehensive resource on pesticide information.

http://npic.orst.edu/factsheets/rodenticides.html#references