Repellents

Repellents
From National Wildlife Control Training Program

Several repellents are registered for use to prevent deer damage to plants, including putrescent whole egg solids, ammonium soaps, thiram, capsaicin, garlic, and blood meal. Several home remedies, such as human hair and soap are reported to be effective, but research does not support these claims. In general, the effectiveness of repellents is highly variable and dependent on alternative resources, deer densities, habituation, and motivation of individual deer. Repellents must be reapplied every 4 to 5 weeks if deer feeding pressure is high, and those applied to plants must also be reapplied to new growth. In the northeast, cold temperatures and snow limit applications during the winter months when deer damage to woody ornamentals and young trees is greatest.

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