Powdery mildew on mungbean and blackgram.: Erysiphe polygoni; Sinhala: Pitipus rogaya, Tamil: Thool punchana noi
Publication: PlantwisePlus Knowledge Bank
Pest Management Decision Guides
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Prevention
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Establish crop in April-early May during yala season
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Maintain proper plant spacing (30 – 40 x 10 cm)
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Avoid overhead irrigation
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Apply recommended nitrogen fertilizers
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Remove weeds and alternate hosts, e.g. Euphorbia herta
Monitoring
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Make regular field inspection for early diagnosis of the disease
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Observe White powdery substances on the leaves
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Observe Leaf drying at severe infection
Restrictions
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At warm and humid conditions, commence chemical control once initial symptoms are observed
Direct Control
Sulphur 80% WG. Rate of dilution – 50 g / 10 lit. of water. Rate of application – 2500 – 3000 g / ha
WHO Classification III. Toxic to parasitoids
Carbendazim 50% WP. Rate of dilution – 7 g / 10 lit. of water. Rate of application – 225 – 275 g/ha
WHO Class – U. Toxic to predatory mites, earth worms and fish and moderately toxic to parasitoids
Chlorothalonil 500 g /l SC. Rate of dilution – 30 ml/ 10 lit. of water. Rate of application – 950 – 1800 ml /ha
WHO Class U. Toxic to predatory mites, earth worms and fish
Indexing Terms
Descriptors
- crop production
- pest management
- control
- pests
- extension
- monitoring
- powdery mildew
- mung beans
- black gram
- plant pathogenic fungi
- plant pathogens
- fungal diseases
- plant diseases
- plant disease control
- cultural control
- planting season
- planting date
- spacing
- crop density
- fertilizers
- application rates
- weeds
- weed control
- sulfur
- fungicides
- chemical control
- carbendazim
- chlorothalonil
- pathogens
Organism Descriptors
Identifiers
Geographical Location
Broader Terms
Information & Authors
Information
Published In
Pest Management Decision Guides
Pest Management Decision Guide: Green and Yellow List
Applicable geographic locations
Asia, Sri Lanka
Copyright
© CABI 2020. 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 2015
Published online: 21 December 2020
Language
English
Authors
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