The T-STAR Hawai'i Coqui Frog Invasive Species Project is investigating the efficacy of vapor heat on coqui frog eggs and which plants can tolerate the heat treatment. Treatment with hot, humid air (45°C [113°F], > 90% relative humidity) for 15 minutes is lethal to frogs and eggs.

Testing for thermal damage was conducted on a variety of ornamental plants. Orchids and bromeliads were more heat-sensitive than other plants tested.

To find out more about the results of the tests, see the Response of Plants Following a Foliar Application of 25% Citric Acid report.