The Irish Greyhound Board (IGB) and the Kingdom Greyhound Stadium have withdrawn their support from the Rose Of Tralee.
They say the decision was taken "reluctantly" following consultation with festival organisers.
The IGB says it was after many festival ambassadors - including the Roses themselves - were subject to "malicious online threats" in recent weeks.
The board says while it respects the right to protest, this must be done in a peaceful manner.
The IGB and Kingdom Greyhound Stadium say they "regret this decision".
"The long standing partnership between both the festival and IGB has been positive for the area with both organisations playing significant roles in the community and the local economy and both parties involved with many charitable organisations throughout the country", the board adds.
The greyhound industry has in the spotlight in recent weeks, following a documentary raising animal welfare concerns.
The 2019 Rose Of Tralee Festival takes place from Friday August 23rd.
Main image: Presenter Daithi O Se with some of the 65 Roses in 2017 | Image: Brian Lawless/PA Archive/PA Images