This disease, also called Iron Spot, is caused by the fungal pathogen, Cercospora coffeicola and tends to present itself on coffee plants grown in areas of higher. General information. Cercospora leaf spot is a common disease in beetroot and silver beet but is usually unimportant in well-managed crops. It may be a. Abstract. Brown eye spot, caused by Cercospora coffeicola, is an important disease of coffee. Both adaxial and abaxial leaf surfaces were inoculated with a.
|Published (Last):||24 April 2010|
|PDF File Size:||20.91 Mb|
|ePub File Size:||11.52 Mb|
|Price:||Free* [*Free Regsitration Required]|
Mycosphaerella coffeicola – Wikipedia
Conidial morphology varies greatly with environmental conditions. Genetic variation among isolates commonly exists in field populations, although there is no known sexual state.
Host plants include many weed species such as cercoxpora, pigweed, mallow, and bindweed. Economic hosts include tablebeet, sugar beet, Swiss chard, spinach, and most wild Beta species.
Fact sheet – Coffee brown-eye spot ()
Infection and lesion formation initially occur on older leaves before progressing to newer ones. Severely affected leaves wither and die from coalescing lesions. A diagnostic feature is the presence of tiny black dots pseudostromata that form in leaf substomatal cavities within the grayish-tan lesions. The pseudostromata produce conidiophores borne in clusters that serve as conidia-bearing structures.
Pseudostromata are visible with a hand lens, and after exposure of leaves to high humidity, entire lesions appear fuzzy due to the presence of numerous conidia. Pathogen survives mainly in plant debris as desiccation-resistant pseudostromata, but can also survive as conidia in debris or seeds.
When moisture is sufficient, new conidia are formed and spread via rain-splash or wind to new leaves or plants. Many fungicides are available for managing the disease.
However, fungicide resistance management must also be considered and monitored carefully, since C. Soilborne pathogens, biological control, sustainable production.
Cercospora Leaf Spot
Cercosspora Share This Page. Resistant varieties of sugar beet. Contact Us Nebraska plant pathology specialists, their focus areas, and contact information: Soilborne pathogens, biological control, sustainable production Loren Giesler Phone: Soybean Robert Harveson Phone: Dry bean, sugar beet, and sunflower Tamra Jackson-Ziems Phone: Corn and sorghum Stephen N.