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Eve from Forestville,ca. writes,

secondary poisoning concern with wildlife & contrac blox.Also, how effective in killing voles?

I garden near wildlife habitat & considering using contrac blox for dusky footed wood rats & for a vole population explosion-which can be very destructive to all sorts of plantings.What about birds of prey,snakes,foxes,etc.-if they eat a recently poisoned rodent?How effective is it for voles?


Contrac Blox is not labeled for voles or for dusky footed wood rats. Contract Blox is only labeled for Norway Rats, Roof Rats and House Mice. Also due to the new EPA regulations, when used outdoors rodenticides can only be used immediately adjacent to or within 20 ft of a structure and the bait must be contained in tamper resistant bait stations. There is a chance of secondary poisoning if an animal eats a rodent that has been killed by rodenticide. Terad3 rodenticide is usually used in areas where secondary poisoning is a concern because it has a reduced risk of secondary poisoning. No matter what bait you choose you will still need to remove and dispose of any carcass you find to help eliminate the risk of secondary poisonings. You should know that most products that were labeled for voles have now been removed from the market by the EPA. In most cases it is recommended that you use old fashioned wooden snap traps placed directly in the voles travel paths to help reduce vole numbers.

Answer last updated on: 02/18/2012

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