Read more about REPELLEX tests:

Studies have been conducted by Dr. Larry Katz at Rutgers University's Department of Animal Sciences over the last four years.  More than 35 substances plus Deer-off were tested for their ability to deter deer from eating plants and flowers.  was found to be twice as effective as the nearest competitor!

"The density at the test site, 200 deer per square mile, is as high or higher than any other site in the continental United States.  As of November 7th 1998, Repellex is the most effective deer browsing deterrent  ...  more effective than all the commercially available products I have worked with in the past."

Methods

"The study design included 4 replicates with each replicate containing 3 plants.   Plants in each replicate were treated at the beginning of the study with either Repellex, a commercial egg-based product, or water."   The extent of damage was recorded daily for 31 days on the scale 0 to 5, with level 0 being no damage and level 5 being totally destroyed.

Results

"The intensity of deer pressure at the experimental site is evidenced by the damage to control plants within 24 hours of the onset of the study.  ...  By day 20 all control plants were heavily damaged, i.e. all blooms were eaten.  ...  By the end of the study the remaining two plants in the egg-based group were also beginning to show damage by deer.  ...  none of the Repellex treated plants were damaged by deer."

Conclusion

"Repellex was highly effective at protecting chrysanthemums in this study.   Furthermore, Repellex was more effective than the commercially available products made from eggs.  Ongoing trials are attempting to protect a field planting of Winter Rye  ...  Repellex appears to be superior to the competition again!"