Alectra vogelii has been the major constraint known to attack leguminous species especially to cowpea production. Identification of genetic variation of i. Alectra vogelii is a root parasitic weed mainly on economically important leguminous crops in a large part of the African continent. The extremely small seeds. Alectra vogelii (Benth.) is an angiosperm root hemi-parasite attacking C3 legumes in semi arid tropics; cowpea, groundnut, soybean and grams are the most.

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Cultural Control Two options, catch and trap-cropping, are available for reducing the size of the A. The biology of Alectra vogelii Benth.

Little attention has therefore been given to the development of chemical control. Close Find out more. The petals are pale yellow and may or may not have three deep red veins. The stems and leaves, which can be 1.

The main danger in Africa would be to introduce biotypes with differential host specificity from one area to another. Further details may be available for individual references vogellii the Distribution Table Details section which can be selected by going to Generate Report.

A survey of Striga spp. Hutchinson and Dalziel, At the site of contact lateral roots very soon develop abundantly, possibly enhancing the uptake of water and nutrients from the soil.

Magani and Lagoke report that farmers can reduce cowpea infection by A.


In line with our Privacy Policy, we want to make you aware about what we do with the information you provide when you create your My CABI account. Organism Names see more detailseukaryotes eukaryotes Subject Category: Third objective, a total of 21 A.

Biological Control No research has been reported on the development of biological control agents for A. Like most websites we use cookies. It is alcetra present at low densities in stands of traditional cowpea land-races but builds up rapidly to become a problem when a susceptible exotic cultivar is introduced as occurred in Botswana from the late s. Tiny seeds are easily spread by wind, surface water flow or vogelji crop seed.

Parasitic weed problems in southern Malawi and the use of farmer knowledge in the design of control measures. Parker and Riches have reported that seeds may remain viable in the soil for up to 12 years.

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The parasitic angiosperm Alectra vogelii Benth. Breeding for Striga resistance in cereals, Weikersheim, Germany: We collect your name, email address, institutional alcetra and login credentials. Uses Top of page No uses of the plant have been reported. Organism Names see more detailsFabaceae fabaceae Subject Category: The number of emerged A.

Tropical Pest Management, 30 vogeii Kureh I; Alabi SO, Continuing to use www. Rainfall Regime Top of page Summer. By and large these are found in semi-arid areas with a short growing season of 4 to 6 months, below m altitude. In parts of West Africa, leaf margins are almost entire, in central and southern Africa they may have two to five widely spaced teeth along aalectra edge while in Kenya plants with five or six sharp teeth, each up to 3 mm long, have been collected.


The anthers and filaments are glabrous.

yellow witchweed, Alectra vogelii Scrophulariales: Orobanchaceae

Pigeon pea is the only widely grown grain legume which is not parasitized. Organism Names see more detailsSpermatophyta spermatophyta Subject Category: In a season of good rainfall, a quick-maturing crop of sunflower could then be grown with cowpea planted again in the following season.

This would be cut and the roots destroyed by ploughing when about two months old and when A.

Tropical Science, 46 3: The flowers wither and remain covering the developing globose seed capsule which swells to approximately 5 mm in diameter at maturity. Voyelii sown crops of soyabean may be completely destroyed by the parasite in northern Nigeria Lagoke, Reports of the species in association with non-crop legumes and occasionally non-legumes always involve weeds on fallow or cropped arable land.

It is closely associated with cultivation, is occasionally found associated with weeds of fallows but rarely in natural vegetation. Pretoria, Brooklyn, PretoriaSouth Africa.

American Journal of Botany, Please only use this feature if you are author of these publications:

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