Recognize the problem
Sooty mold refers to the various species of black fungi growing on leaves as a result of honeydew, which is the excretion produced by sucking insects that feed on the plant. The fungi resemble soot and can cover leaves, stems and fruits. Fungi do not infect the plants directly but reduce their ability to utilize sunlight, hence yield may be affected. Sooty mold also increases the cost of marketing fruits as it needs to be removed before sale.
Background
Sooty mold can affect a wide range of crops and grow on any surface where honeydew is present. Sucking insects should be controlled to prevent the honeydew and therefore the problem. Ants that feed on the honeydew can carry the sucking insects from plant to plant and protect them from the predators which would naturally control their numbers. Therefore, ants should be controlled to allow predators access to the sucking insects. Tall trees infested with sooty mold should be pruned or cut as they are difficult to spray.
Management
•
Do not attempt to control the fungus. Instead, control the insect pest that is causing the fungal growth.
•
If possible, remove excessive shade surrounding the plot
•
Paint or treat cut surfaces of plants after pruning to limit ant infestations
•
Use Golden Pest Spray oil 3 Tbs/gallon of water every 14 days to control sucking insects such as aphids, mealy bugs, leafhoppers and whiteflies. Add cypermetrin (e.g. Fastac) 2 tsp/gallon of water to this mixture to control ants.
When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.
Indexing Terms
Descriptors
- arthropod pests
- chemical control
- control
- cultural control
- cypermethrin
- disease control
- fungal diseases
- insect control
- insect pests
- insecticides
- moulds
- oils
- pathogenicity
- pathogens
- pest control
- pesticides
- pests
- plant disease control
- plant diseases
- plant pathogenic fungi
- plant pathogens
- plant pests
- pruning
- publications
- sooty moulds
Organism Descriptors
Identifiers
Geographical Location
Broader Terms
Information & Authors
Information
Published In
Applicable geographic locations
Grenada, North America
Copyright
© CABI 2014. This article is published under aCreative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)Published under a CC-BY-SA 4.0 licence
History
Issue publication date: 1 January 2014
Published online: 12 August 2015
Language
English
Authors
Metrics & Citations
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