Coffee Leaf Rust (Hemileia vastatrix) 
Officially Confirmed to be Found on Maui and Kona (Hawaii Island)

Proper Pesticide Use is of Extreme Importance to Prevent Pesticide Resistance by Coffee Leaf Rust and Other Coffee Diseases
The following publication provides important information for Hawaii coffee growers, about the proper methods of spraying to suppress coffee leaf rust (CLR) while preventing pesticide resistance by rust and other diseases on farms. The article includes:
  • ​List of fungicides currently licensed by the Hawaii Department of Agriculture with directions for use on coffee grown in Hawaii.
  • ​Some symptoms of CLR
  • Why spray to suppress CLR
  • Proper spray techniques and coverage
  • How to properly rotate the use of pesticide products
  • Spraying anthracnose, cercospora, and CLR
  • Following product label directions
  • Minimum and maximum rates per application and per year or season
  • Other considerations such as spreader/sticker and other additions to a fungicide solution

Click here to download the English version.
Click here to download the Spanish version.
Coffee Leaf Rust Field Guide and Submission Form
Click ​here​​ to download the complete field guide and submission form.
November 10, 2020
HDOA Release Re: Coffee Leaf Rust Confirmed on Hawaii Island 
Coffee Leaf Rust Photo Slideshow
October 30, 2020
HDOA Release Re: Coffee Leaf Rust Confirmed on Maui and Tentatively Found on Hawaii Island
October 29, 2020
HDOA Memo Re: Coffee Leaf Rust Tentatively Identified on Hawaii Island
October 26, 2020
HDOA Release Re: Coffee Leaf Rust Tentatively Found on Maui
October 23, 2020 
HDOA Memo Re:  Coffee Leaf Rust Suspected on Maui
If suspected, what do I do?
  • Contact and report your find immediately to the Hawaii Department of Agriculture by calling their toll-free pest hotline at 808-643-PEST (7378) or by contacting your nearest UH CTAHR Cooperative Extension office (also listed below). Listen carefully to their instructions. Their instructions may supersede any of the instructions below.
    • ​Big Island - Kona - 808-322-4892;  Hilo - 808-969-8201;  Kamuela - 808-887-6183 
    • Maui - Kahului - 808-244-3242 x222
    • Molokai - Hoolehua - 808-567-6929 
    • Oahu - Honolulu - 808-956-7290;  Pearl City - 808-453-6050;  Wahiawa - 808-622-4185 
    • Kauai - Lihue - 808-274-3471 
  • DO NOT touch the diseased plant parts and DO NOT collect samples of this fungal pathogen or damaged plant parts to prevent potential spread.
  • If possible to do without touching the diseased plant parts, take clear photos and/or video and share them with HDOA and the Cooperative Extension agent.
  • Flag or visibly mark the area where the pest was found and communicate the find with all farm employees and administrators.
  • Keep people and pets away from the area and DO NOT allow movement of soil, plant materials or supplies from the location that the disease was found.
  • If you have touched or contaminated your clothing, footwear, hat, etc. with the fungal pathogen or think you may have, shower immediately with soap and water and wash your clothing, footwear, hat, etc. in laundry detergent and dry with high heat. Once decontaminated, then travel from your farm or location.
  • Provide HDOA and the Cooperative Extension agent with information such as your name and contact, the exact location and address of find, and type of host material where found. Personal information will not be shared with the general public.​
​​Preventing new pest and disease introductions to Hawaii
Comply with all HDOA and USDA quarantine regulations. Quarantine restrictions have been placed on unroasted coffee, coffee seeds, plants and other propagative materials, used coffee materials and supplies, etc.
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