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  • Coffee Leaf Rust
    • Coffee Leaf Rust Photos
    • HDOA CLR Pest Alert >
      • HDOA CLR Report Form
    • Sanitation and Disinfestation Info
    • Surveying, Sampling and Monitoring of CLR >
      • HDOA CLR Field Guide and Submission Form
    • Spraying for CLR and Spray Product Info >
      • Spraying for CLR - English
      • Pulverización para CLR - Español
      • Spraying for CLR - Tagalog
      • Spraying for CLR - Ilocano
      • Sprayer Calibration and Pesticide Calculations
      • Priaxor Xemium Info
      • ProBlad Verde Info
      • Pesticide Use FAQs
    • Pruning for CLR and CBB
    • Coffee Leaf Rust Poster >
      • La Roya del Café Póster - Español
      • Coffee Leaf Rust Poster - Tagalog
      • Coffee Leaf Rust Poster - Ilocano
    • CLR Trifold Brochure
    • CLR Presentations and Meetings
    • CLR Publications
    • CLR/CBB Subsidy Program Info
    • Bioworks BotaniGard and Mycotrol Compatibility Chart
  • CBB Management
    • Field Sanitation
    • Pruning >
      • Two-Year Cycle Block Pruning Method by Aki Yamagishi
    • Feral and Unmanaged Coffee Trees
    • Field Monitoring
    • CBB Control >
      • Predators of CBB
    • Harvesting
    • Shipping
    • Beauveria Subsidy Program Info
    • Bioworks BotaniGard and Mycotrol Compatibility Chart
    • 2020 CBB IPM Document
    • CBB & Coffee Presentations & Posters
    • CBB Publications
  • Events and Announcements
    • Worker Protection Standard (WPS) Workshops - Sign Up
    • Hands-on Coffee Grafting Workshops - Sign Up
  • Hawaii Coffee Pests and Problems
    • Anthracnose
    • Banana Moth
    • Bird Damage
    • Black Twig Borer
    • Blister Spot
    • Cercospora Leaf Spot and Berry Blotch
    • Coffee Berry Borer
    • Coffee Root-knot Nematode
    • Food Safety Concerns - Slug, feces, etc.
    • Fruit Fly
    • Glyphosate Herbicide Injury
    • Green Scale and Sooty Mold
    • J-rooting
    • Little Fire Ant
    • Mite Feeding Damage
    • Nutritional Problems
    • Over-bearing Dieback
    • Rodent Damage
    • Skin Cracking
    • Slug and Snail Damage
    • Sunburn on Coffee
  • NKO - Coffee Pests and Diseases Not in Hawaii
    • Coffee Berry Disease - NKO
    • Coffee Leaf Miner - NKO
    • Coffee White Stem Borer - NKO
    • Coffee Wilt Disease - NKO
  • Coffee Publications and Presentations
    • Growing Coffee in Hawaii
  • Coffee Leaf and Soil Sampling Instructions
  • HDOA Rules - Coffee
  • USDA - Coffee Rules
  • Coffee Organizations in Hawaii
  • Agricultural Theft
    • Chapter 145 - Reg. of Farm Product
    • Dealer Licensing
    • Contacts
  • Crop Insurance
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Common Coffee Problems in Hawaii


Picture
Prior to the discovery of Coffee Berry Borer (Hypothenemus hampei) in Hawaii, there were few major coffee pest and disease problems for farmers. The CTAHR booklet, Growing Coffee in Hawaii, provides an array of information on the basics of establishing a farm and growing, producing, and processing coffee. Common pests and disease problems of Hawaii-grown coffee is also mentioned. For further details, please read Pest Management Strategic Plan for Coffee Production in Hawaii to learn about the different current and potentially new invasive introductions of coffee pests and diseases as well as their control and management strategies identified for each.
​
Although 
not yet found in Hawaii, Coffee Leaf Miner (Leucoptera coffeella), Coffee Berry Disease (Colletotrichum kahawae), Coffee Wilt Disease (​​​Gibberella xylarioides), and Coffee White Stem Borer (Xylotrechus quadripes) are other critical and devastating insect pests and diseases of coffee found world-wide. 

What do I do if I suspect one of these NKO insect pests or diseases?
​Click HERE.

Self-Diagnosing Your Coffee Problem
You can submit a sample (instructions below) or try to self-diagnose your coffee problem. Locate your major symptom(s) and click on the possible problem(s) associated with plant part(s) below. There may be one or more reason for the problem or symptoms you see and the exact reason(s) may not be listed below. Contact your local UH CTAHR Cooperative Extension office for assistance.

Whole-plant Dieback:
  • J-rooting
  • Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
  • Overbearing dieback
  • ​Physical damage to stump
  • Coffee Root-knot nematode
  • ​Root rot
  • Slug and/or snail damage
  • ​Coffee berry disease - NKO
  • ​Coffee white stem borer - NKO
  • Coffee wilt disease - NKO​
Vertical (upright branches) Dieback:
  • Anthracnose
  • Banana moth
  • Black twig borer
  • ​Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
  • Physical damage to vertical or stump​
  • Slug and/or snail damage
  • ​​Coffee berry disease - NKO​
  • ​Coffee white stem borer - NKO
  • Coffee wilt disease - NKO
Lateral (side or horizontal branches) Dieback:
  • Anthracnose
  • Black twig borer
  • ​Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
  • Physical damage to vertical or lateral
  • Rodent damage
  • ​Coffee berry disease - NKO
  • ​Coffee white stem borer - NKO
  • Coffee wilt disease - NKO​

Leaf or Leaves:
  • ​Defoliation/leaf drop
    • Anthracnose
    • Banana moth at nodes
    • Black twig borer
    • Insect pest at the base of the leaf
    • Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
    • ​​Phytotoxicity damage from foliar fertilizer, pesticide, or other solution application to plant/leaves
    • ​Coffee root-knot nematode
    • ​​Slug and/or snail damage to the vertical or lateral
    • Wind; excessive
    • ​​Coffee leaf miner - NKO
    • Coffee leaf rust
    • ​Coffee wilt disease - NKO
  • Distortion or abnormal shape
    • Herbicide damage
    • ​Mite feeding damage​​
    • Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions​
    • Phytotoxicity damage from foliar fertilizer, pesticide, or other solution application to plant/leaves
    • Sap-feeding insects such as green scale, mealybug or aphids​
Leaf cont.
  • Flagging
    • Anthracnose
    • Banana moth at nodes
    • Black twig borer​
    • Lack of water, rain, irrigation; possibly in combination with windy conditions
    • ​Phytotoxicity damage from foliar fertilizer, pesticide, or other solution application to plant/leaves
    • Slug and/or snail damage to the vertical
    • ​Coffee root-knot nematode
    • ​Root rot
    • Coffee wilt disease - NKO
  • ​​Mining of the leaf
    • ​​​​Coffee leaf miner - NKO
  • Overall discoloration
    • ​Lack of water, rain, irrigation
    • ​Mite feeding damage
    • Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions


Leaf cont.​
  • Overall discoloration cont.
    • ​Phytotoxicity damage from foliar fertilizer, pesticide, or other solution application to plant/leaves
    • Sooty mold, caused by a sap-feeding insect​
  • Spots, blotches or edge necrosis
    • Blister spot
    • ​Cercospora leaf spot and berry blotch
    • ​Frost damage (not common)
    • ​​Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
    • Phytotoxicity damage from foliar fertilizer, pesticide, or other solutions applied to plant/leaves
    • Sap-feeding insects
    • ​Coffee berry disease - NKO
    • Coffee leaf rust
    • Coffee leaf miner - NKO

Berries/Fruits
  • Cracking or splitting of skin
    • Excessive rain or irrigation, especially following a dry period
    • Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
  • ​Dried or mummified berries that don't ripen​​
    • ​Anthracnose
    • Banana moth at nodes
    • ​Black twig borer in stem
    • Blister spot
    • ​Cercospora leaf spot and berry blotch
    • ​Mite feeding damage​​ to the leaves
    • ​​Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
    • ​Overbearing dieback
    • ​​Coffee root-knot nematode
  • Hole at flower-end/flower scar
    • ​Coffee berry borer
    • Black twig borer
  • Hole or pit on side of berry
    • Bird damage from beak or nails
    • ​​Black twig borer
    • Fruit fly
    • Other insects
Berries/Fruits cont.
  • Pre-mature ripening
    • Banana moth at nodes
    • ​​Black twig borer in stem​
    • Coffee berry borer​
    • Overbearing dieback
    • ​Coffee berry disease - NKO
    • Coffee wilt disease - NKO
  • Spots or blotches on skin
    • ​Blister spot
    • ​Cercospora leaf spot and berry blotch
    • ​​Nutritional problems (too little or too much), ​unsuitable soil and/or unfavorable weather conditions
    • Phytotoxicity damage from foliar fertilizer, pesticide, or other solutions applied to plant/leaves
    • Sap-feeding insects
    • ​Sunburn; removal of shade tree or branches; too much sunlight and/or heat from sun
    • ​Coffee berry disease - NKO​
  • Uneven ripening
    • ​Anthracnose
    • Banana moth at nodes
    • ​Black twig borer in stem
    • ​Coffee berry borer
    • Mite feeding damage​​ to the leaves​
    • Sap-feeding insects
    • ​Coffee berry disease - NKO​
    • ​Coffee wilt disease - NKO

Collecting Plant Disease and Insect Pest Samples for Problem Diagnostics
Learn how to best collect and submit disease, insect pest and nematode samples to the UH Agricultural Diagnostic Service Center (ADSC) for diagnosis. Click here for ADSC analytical service fees.
  • General directions on collecting and submitting samples  - Collecting Plant Disease and Insect Pest Samples for Problem Diagnosis

Coffee Leaf and Soil Sampling
Learn how to correctly sample and submit coffee leaf and soil samples for proper analysis of plant nutritional status and and soil pH and nutrient status.
  • Coffee leaf and soil sampling directions - How to take coffee leaf and soil samples
  • General directions for farm soil sampling - Testing Your Soil: Why and How to Take a Soil-Test Sample
  • Nutrient sufficiency levels for coffee - Adequate Nutrient Levels in Soils and Plants in Hawaii (General Guide) 
  • ​Click here for ADSC analytical service fees

Contact website management if you require any assistance with the site or information provided.
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  • Home
  • Coffee Leaf Rust
    • Coffee Leaf Rust Photos
    • HDOA CLR Pest Alert >
      • HDOA CLR Report Form
    • Sanitation and Disinfestation Info
    • Surveying, Sampling and Monitoring of CLR >
      • HDOA CLR Field Guide and Submission Form
    • Spraying for CLR and Spray Product Info >
      • Spraying for CLR - English
      • Pulverización para CLR - Español
      • Spraying for CLR - Tagalog
      • Spraying for CLR - Ilocano
      • Sprayer Calibration and Pesticide Calculations
      • Priaxor Xemium Info
      • ProBlad Verde Info
      • Pesticide Use FAQs
    • Pruning for CLR and CBB
    • Coffee Leaf Rust Poster >
      • La Roya del Café Póster - Español
      • Coffee Leaf Rust Poster - Tagalog
      • Coffee Leaf Rust Poster - Ilocano
    • CLR Trifold Brochure
    • CLR Presentations and Meetings
    • CLR Publications
    • CLR/CBB Subsidy Program Info
    • Bioworks BotaniGard and Mycotrol Compatibility Chart
  • CBB Management
    • Field Sanitation
    • Pruning >
      • Two-Year Cycle Block Pruning Method by Aki Yamagishi
    • Feral and Unmanaged Coffee Trees
    • Field Monitoring
    • CBB Control >
      • Predators of CBB
    • Harvesting
    • Shipping
    • Beauveria Subsidy Program Info
    • Bioworks BotaniGard and Mycotrol Compatibility Chart
    • 2020 CBB IPM Document
    • CBB & Coffee Presentations & Posters
    • CBB Publications
  • Events and Announcements
    • Worker Protection Standard (WPS) Workshops - Sign Up
    • Hands-on Coffee Grafting Workshops - Sign Up
  • Hawaii Coffee Pests and Problems
    • Anthracnose
    • Banana Moth
    • Bird Damage
    • Black Twig Borer
    • Blister Spot
    • Cercospora Leaf Spot and Berry Blotch
    • Coffee Berry Borer
    • Coffee Root-knot Nematode
    • Food Safety Concerns - Slug, feces, etc.
    • Fruit Fly
    • Glyphosate Herbicide Injury
    • Green Scale and Sooty Mold
    • J-rooting
    • Little Fire Ant
    • Mite Feeding Damage
    • Nutritional Problems
    • Over-bearing Dieback
    • Rodent Damage
    • Skin Cracking
    • Slug and Snail Damage
    • Sunburn on Coffee
  • NKO - Coffee Pests and Diseases Not in Hawaii
    • Coffee Berry Disease - NKO
    • Coffee Leaf Miner - NKO
    • Coffee White Stem Borer - NKO
    • Coffee Wilt Disease - NKO
  • Coffee Publications and Presentations
    • Growing Coffee in Hawaii
  • Coffee Leaf and Soil Sampling Instructions
  • HDOA Rules - Coffee
  • USDA - Coffee Rules
  • Coffee Organizations in Hawaii
  • Agricultural Theft
    • Chapter 145 - Reg. of Farm Product
    • Dealer Licensing
    • Contacts
  • Crop Insurance
  • Archive
  • About us
  • Blog