Coffee leaf rust: Hemileia vastatrix
Recognize the problem
Rust produces small orange spots, which resemble coffee blight. Recently, highly severe rust has been damaging coffee production in Honduras.
It causes premature leaf drop, impairing the production in the following year. Rust is more frequent in coffee plantations where shade is dense.
It causes premature leaf drop, impairing the production in the following year. Rust is more frequent in coffee plantations where shade is dense.
Background
The orange rust spores are like blight.
Edwin Chinchilla
Rust more frequently affects old plants and develops better in humid conditions.
It is caused by a fungus that produces spores. The spores are like seeds and are dispersed by the wind throughout the coffee plantaton.
It is caused by a fungus that produces spores. The spores are like seeds and are dispersed by the wind throughout the coffee plantaton.
Management
Make a Bordeaux mixture to heal the wounds in coffee plants.
Jeff Bentley
Rust can be controlled with drastic pruning and less shade. Drastic pruning allows the growth of healthy and vigorous plants.
Good shade
•
Make cuts at one foot above the ground level. Regrowth will be younger and healthier.
•
Make slightly inclined cuts and leave a smooth surface, so that water does not remain in the cut.
•
Protect the cut with Bordeaux mixture, which consists of 70 grams of lime and 100 grams of copper sulfate per litre of water. Use a brush to paint the cut in the coffee plant with Bordeaux mixture for healing.
•
When new plants grow, spray them with a preventive fungicide, like carbendazim (e.g. Derosal) or cyproconazole (e.g. Alto 100), to protect new leaves
•
Fertilize each plant with an ounce of diammonium phosphate (18-46-0), since a well-nourished plant is stronger and can resist the disease
Good shade
•
The coffee plantation needs shade, but it should not be too dense.
•
The shade has to be adjusted to let the sun get in to dry the water on the soil and on the plants. It also allows the development of leaves and roots. An average amount of shade can stop weeds growing, improve soil fertility and protect plants from the wind.
Indexing Terms
Descriptors
- Bordeaux mixture
- carbendazim
- chemical control
- coffee
- coffee leaf rust
- control
- copper
- copper sulfate
- cultural control
- cyproconazole
- diammonium phosphate
- disease control
- fertilizers
- fungal diseases
- fungicides
- lime
- orange rust
- pathogenicity
- pathogens
- pesticides
- phosphates
- plant disease control
- plant diseases
- plant pathogenic fungi
- plant pathogens
- pruning
- publications
- rust diseases
Organism Descriptors
Identifiers
Geographical Location
Broader Terms
Information & Authors
Information
Published In
Applicable geographic locations
Honduras, North America
Copyright
© CABI 2012. This article is published under aCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0)Published under a CC BY-NC-SA 4.0 licence
History
Issue publication date: 1 January 2012
Published online: 1 November 2012
Language
English
Authors
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