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Pest Management Decision Guide
13 April 2016

Annual Grass Weeds in Wheat-Ethiopia: Phalaris paradoxa, Setaria pumila, Avena fatua, Bromus pectinatus, Snowdenia polystachia; Asendabo, Yewesh Senededo, Sinar, Ginechina, Wovilo, Muja

Pictures

Wheat crop in southern Spain infested with Phalaris sp. (M.J. Jiminez)
S. pumila inflorescences and leaf, showing long hairs near base. (FAO Rome. In: A Weed Identification Guide for Ethiopia, Stroud and Parker, 1989)

Prevention

Use certified clean seed for growing crops; seeds considered as the main means of spread
Clean tools and farm machinery to prevent spread of weed seeds
Control established populations near waterways to prevent spread during flooding and storm events
Repeated ploughing/cultivation of the field to destroy weed seedlings when the soil is moist before planting or during off-season in order to reduce the population of weeds germinating after planting

Monitoring

Annual and erect grasses with an open leaf-sheath, upper leaves have a swollen leaf-sheath which envelopes the inflorescence before flowering
Inspect the crop fields a fortnight after sowing for the presence of the weeds, consider control using mannual or chemical control when found

Direct Control

Hand-weeding once (3-4 weeks after sowing) for moderate infestation, however if severe infestation additional hand weeding before heading of the crops

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

Post-emergence application 2-3 weeks after planting of Fenoxaprop-p-ethyl (75%) at 1 L/ha, Clodinafop-propargyl (8%) at 1 L/ ha, Pyroxsulam (45%) at 500 mL/ha use to control the weeds

WHO classification: Clodinafop-propargyl: III (slightly hazardous): Pyroxsulam: III (slightly hazardous); Fenoxaprop-p-ethyl: not classified by WHO; based on rat LD50 data considered unlikely to be an acutely hazardous substance in normal use and can be classed as "slightly hazardous to human health"

Information & Authors

Information

Published In

cover image PlantwisePlus Knowledge Bank
Pest Management Decision Guides
Pest Management Decision Guide: Green and Yellow List

Applicable geographic locations

Africa,  Ethiopia

History

Issue publication date: 1 January 2016
Published online: 13 April 2016

Language

English

Authors

Affiliations

G. Etagegnehu

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