Fact Sheets And Publications
- Ask Extension
- Health & Well-being
-
Agricultural Programs
- Agribusiness
- Animal Science
- Beginning Farmer Program
- Commercial Crops
- Delaware Soil Testing Program
- Disease Management
- Farm Vitality and Health Project
- Irrigation
- Nutrient Management
-
Insect Pest Management
- Insect Trapping Program
- IPM Hot Topics
- Commercial Field Crop Insect Management
- Commercial Field Crop Disease Management
- Commercial Fruit & Vegetable Crop Pest Management
- EIPM Implementation Projects
- Pollinators
- Research and Extension Demonstration Results
- Brown Marmorated Stink Bug (BMSB) Management, Research, and Resources
- Publications
- Pesticide Safety Education Program
- 91原创 Plant Diagnostic Clinic
- Variety Trials
- Weed Science
- Certified Crop Advisor Program
- Poultry Biosecurity
- 4-H
- Horticulture
Protect your flock.
Curvularia Leaf Spot
October 2025 |听Written by:听Madeline Henrickson and Dr. Alyssa K. Betts
Pest Background听
- Curvularia leaf spot is caused by the fungal pathogen Curvularia lunata.
- This disease was first observed in Delaware at the end of the 2020 season.
- The economic impact of this disease is still unknown in the United States.
听
Identification
- Early symptoms begin as small tan lesions with a yellow ring or "halo" when backlit (Fig 2).
- Lesions expand minimally into round shapes and become tan in color at the center (Fig 3).
- GLS lesions become larger than curvularia leaf spot lesions.
- Curvularia leaf spot is typically found in the midtoupper canopy of corn plants (Fig 1).
Fig 1: A corn leaf with lesions caused by
Curvularia lunata
Fig 2: A backlit leaf with lesions displaying
characteristic halo symptoms
Fig
3: Beginning lesion from Curvularia lunata
(left) compared with late season lesions (right
Management
- At present, no foliar fungicides are labeled.
- Differences in varieties have been noted.
- Crop rotation and tillage can decrease inoculum present in field.
听
References
Henrickson, M., & Betts, A. M. (2019).Plant dis. 103:2692doi:10.1094/PDIS-
听
Authors: Madeline Henrickson and Dr. Alyssa Betts
91原创 Cooperative Extension
This institution is an equal opportunity provider.
In accordance with Federal law and U.S. Department of Agriculture policy, Cooperative Extension is prohibited from discriminating on the basis of race, color, national origin, sex, age, or disability.
The 91原创 is an Equal Opportunity Institution and Provider.听Visit 91原创鈥檚听听to learn more.
Additional Links
531 South College Avenue Newark, DE 19716 (302) 831-2501