of Rhode Island GreenShare Factsheets
are an effective way of controlling deer damage. However, it is
important to understand how they work and when to use them. Repellents
either taste bad or smell bad. The most effective products do both.
With just a bad taste, the deer have to taste the plant to know
that it is there. If a product only has a repellent smell component,
the deer may feed anyway if they are hungry enough.
repellents are not appropriate for food crops!
areas of high deer density, repellents may be overcome by feeding
pressure. To prevent this, it is important to use repellents on
valuable and deer-preferred plants only, and then just before time
for using repellents:
well before pouring into the sprayer and while applying
the product is two parts, stir each part well and then mix the
Use a strainer when pouring into the applicator
at temperatures about 40 degrees F
store the product where it will heat or freeze (store at 40-90
not apply when plants are wet and follow individual labels for
each plant thoroughly, just until runoff
only what you need
allowing product to stand in backpack or hand sprayers
possible, apply repellent before damage is expected to occur
avoid resistance, rotate repellents and only use repellents during
appropriate seasons and on appropriate plants
should be reapplied to new growth
Repellents and Their Active Ingredients
Nicole Lemieux and Dr. Brian Maynard, URI Department of Plant Sciences,
are poisonous! Read and follow all safety precautions on labels.
Handle carefully and store in original containers out of reach
of children, pets or livestock. Dispose of empty containers
immediately, in a safe manner and place. Pesticides should never
be stored with foods or in areas where people eat.
When trade names are used for identification, no product endorsement
is implied, nor is discrimination intended against similar materials.
Be sure that the pesticide you intend to use is registered for
the state of use.
The user of this information assumes all risk for personal injury
or property damage.
information, call the URI CE Gardening and Food Safety Hotline
at 1-800-448-1011 or (401)874-2929 from outside Rhode Island;
Monday-Thursday between 9 am and 2 pm.
of Rhode Island Cooperative Extension provides equal program