African couch grass (Urwiri) in Beans-Rwanda: Digitaria abyssinica. ; Urwiri (Kinyarwanda), Chiendent (French), African Couchgrass (English)
Publication: PlantwisePlus Knowledge Bank
Pest Management Decision Guides
Pictures
Prevention
•
Practice deep tillage to ensure total removal of the plant including rhizomes and fragments as these contribute much to sprouting
•
Use of certified and clean seeds
•
Apply NPK fertilizers and organic manure such as farmyard manure or compost at planting
•
Crop rotation (e.g. with maize or sweet potato)
Monitoring
•
Look for creeping grass with long, slender, branching rhizomes which form a dense mat beneath the soil surface. Lanceolate leaves, up to 15 cm long and 2-8 mm wide. Inflorescences branched with 2 to 25 upwardly pointing, 2-11cm long flower heads ('branches')
•
Check for the presence of the weed 2 weeks after planting and take control action if found
Direct Control
•
Practice weeding (hoeing) two weeks after planting as a way to prevent the development of rhizomes and seed set
•
Remove soil by shaking, spread the weed to allow them to dry out and decompose
•
Do a second weeding 2 weeks after 1st weeding
Restrictions
•
Use of chemical herbicides may lead to the development of herbicide resistance.
•
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.
Direct Control
Apply Glyphosate (Roundup) at 100ml/100L water (knapsack sprayer), use up to 3-6L/ha. Spray at the early seed-head stage when plants are actively growing. Use the low rate for suppression only
WHO Class III (slightly hazardous). Spray early in the season when the weeds are small, and preferably early in the morning; r.e.i: 24hrs; p.h.i: 14 days
Indexing Terms
Descriptors
Organism Descriptors
Identifiers
Geographical Locations
Broader Terms
- Poaceae
- Poales
- commelinids
- monocotyledons
- angiosperms
- Spermatophyta
- plants
- eukaryotes
- Papilionoideae
- Fabaceae
- Fabales
- eudicots
- Arachis
- Digitaria
- Glycine (Fabaceae)
- Pisum
- Africa
- ACP Countries
- East Africa
- Africa South of Sahara
- Francophone Africa
- Least Developed Countries
- low Human Development Index countries
- low income countries
Information & Authors
Information
Published In
Pest Management Decision Guides
Pest Management Decision Guide: Green and Yellow List
Applicable geographic locations
Africa, Rwanda
Copyright
© CABI 2016. 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 2016
Published online: 5 May 2016
Language
English
Authors
Metrics & Citations
Metrics
SCITE_
Citations
Export citation
Select the format you want to export the citations of this publication.
EXPORT CITATIONSExport Citation
View Options
View options
Get Access
Login Options
Check if you access through your login credentials or your institution to get full access on this article.