TREATMENT: HOW TO MIX CITRIC ACID FOR COQUI CONTROL
Equipment List:
- For the home gardener, a one-gallon size sprayer or a small backpack sprayer is essential. They are easy to carry.
- Citric Acid Follow all label instructions. You can find a generic label for citric acid here. Citric Acid is a powder available for purchase at Sunshine Hardware in Hawi.
Making your Own Citric Solution:
- The Kohala Coqui Coalition recommends mixing citric at a 12% solution or 1lb per gallon. The best method is to mix the solution by weight but if you mix by volument use approximately 2 1/4 cups per gallon.
- Citric dissolves in solution, but it needs to be thoroughly mixed as a citric chunk will clog your sprayer.
Storage:
- Citric solution can be stored in a glass jar or plastic container . It will corrode plastic if stored for a long time. Spray out all mixed solution and rinse sprayer with water after use.
- Unmixed citric should be kept dry and out of the sun.
Common Sense Caution:
- Citric may burn some sensitive plants, particularly on new growth, ferns, or orchids. You can reduce damage by rinsing off spray 1 hour after application.
- Personal Protective Equipment: Citric acid can irritate your skin. Wear shoes, long-sleeved shirt, eye protection and ear protection if applicable (for when using gas-powered sprayers)
Additional Resources
University of Hawai'i Center of Tropical Agricultural & Human Resources
Click here for University of Hawaii's extensive site for Control of Coqui Frogs in Hawai'i.
Includes:
- Biological Information
- Methods of Control
- Identification
- Current Research
- Publications & Video Access
Hawai'i Department of Agriculture Coqui Page
Click here for the Hawai'i Department of Ag Coqui site.
Includes:
- Coqui Background information
- Posters & Information Cards
Hawai'i Department of Land & Natural Resources Coqui Page
Includes:
- Coqui invasive species profile
- Environmental Impacts
- Comparison to greenhouse frog
University of Hawai'i Citric Acid for Coquis
Click here for University of Hawai'i's page for using Citric Acid with Coquis.
Includes:
- Application information
- Research
Hawai'i Ecosystems at Risk (HEAR)
Click here for HEAR's Coqui species page.
Includes:
- Extensive background information
- Coqui Research
- Information on other client plant and animal species in Hawai'i
- Audio clips of the male coqui and greenhouse calls.