Striga aspera (witchweed)
- Taxonomic Tree
- Distribution Table
- Hosts/Species Affected
- Host Plants and Other Plants Affected
- List of Symptoms/Signs
- Biology and Ecology
- Similarities to Other Species/Conditions
- Prevention and Control
- Links to Websites
- Distribution Maps
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PicturesTop of page
IdentityTop of page
Preferred Scientific Name
- Striga aspera (Willd.) Benth. (1836)
Preferred Common Name
Other Scientific Names
- Euphrasia aspera Willd. (1801)
- STRAS (Striga aspera)
Taxonomic TreeTop of page
- Domain: Eukaryota
- Kingdom: Plantae
- Phylum: Spermatophyta
- Subphylum: Angiospermae
- Class: Dicotyledonae
- Order: Scrophulariales
- Family: Orobanchaceae
- Genus: Striga
- Species: Striga aspera
DistributionTop of page S. aspera overlaps with Striga hermonthica almost throughout West Africa and Cameroon, but is much less common in eastern Africa.
Distribution TableTop of page
The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.Last updated: 10 Jan 2020
|Continent/Country/Region||Distribution||Last Reported||Origin||First Reported||Invasive||Reference||Notes|
|Burkina Faso||Present||M'Boob (1994)|
|Central African Republic||Present||M'Boob (1994)|
|Côte d'Ivoire||Present||Parker and Riches (1993)|
|Ethiopia||Present||Parker and Riches (1993)|
|Gambia||Present||CABI (Undated)||Original citation: Hepper, 1993|
|Guinea-Bissau||Present||CABI (Undated)||Original citation: Hepper, 1962|
HabitatTop of page Generally similar to that for Striga hermonthica, but can tolerate higher moisture levels, hence its occurrence in irrigated rice.
Hosts/Species AffectedTop of page The host range of S. aspera is somewhat similar to that of Striga hermonthica, but includes a rather wider range of wild grass species. It also differs in attacking maize much more commonly than it attacks sorghum.
Host Plants and Other Plants AffectedTop of page
SymptomsTop of page As Striga hermonthica.
List of Symptoms/SignsTop of page
|Leaves / abnormal patterns|
|Leaves / yellowed or dead|
|Stems / stunting or rosetting|
|Whole plant / dwarfing|
|Whole plant / early senescence|
Biology and EcologyTop of page Very similar in most respects to Striga hermonthica, but emerging and maturing more rapidly where the two overlap in West Africa, and sometimes occurring in wetter conditions, including irrigated rice.
ImpactTop of page S. aspera causes significant damage to rice and maize in several countries of West Africa.
Similarities to Other Species/ConditionsTop of page See Striga hermonthica.
Prevention and ControlTop of page
Due to the variable regulations around (de)registration of pesticides, your national list of registered pesticides or relevant authority should be consulted to determine which products are legally allowed for use in your country when considering chemical control. Pesticides should always be used in a lawful manner, consistent with the product's label.Control measures for S. aspera are generally comparable to those for Striga hermonthica, but there are some differences in varietal susceptibility and resistance. The maize hybrids tolerant of S. hermonthica do not tolerate S. aspera (Kim and Winslow, 1992), while rice varieties resistant to S. hermonthica are also resistant to S. aspera (Johnson et al., 1997).
ReferencesTop of page
Hepper FN, 1963. Scrophulariaceae. In: Hutchinson J, Dalziel JM, Hepper FN, eds. Flora of West Tropical Africa, Volume 2, second edition. London, UK: Crown Agents, 352-374.
M'Boob SS, 1994. Striga in Africa. In: Lagoke STO, Hoevers R, M'Boob SS, Traboulsi, eds. Improving Striga Management in Africa. Proceedings of the 23nd General Workshop of the Pan-African Striga Control Network (PASCON), Nairobi, 1991. Rome, Italy: FAO, 25-29.
CABI, Undated. Compendium record. Wallingford, UK: CABI
Hepper FN, 1963. Scrophulariaceae. In: Flora of West Tropical Africa, 2 (second) [ed. by Hutchinson J, Dalziel JM, Hepper FN]. London, UK: Crown Agents. 352-374.
M'Boob SS, 1994. Striga in Africa. In: Improving Striga Management in Africa [Proceedings of the 23nd General Workshop of the Pan-African Striga Control Network (PASCON), Nairobi, 1991], [ed. by Lagoke STO, Hoevers R, M'Boob SS, Traboulsi]. Rome, Italy: FAO. 25-29.
Distribution MapsTop of page
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