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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Buy Instant Access You are not logged in. The seed has no after-ripening requirement. Cowpea production and utilisation [ed.

Fite reports on resistant landraces from Botswana, and finds that cultivars with thicker stems are negatively correlated with Alectra infection. Global invasive potential of 10 parasitic witchweeds and related Orobanchaceae. Chancellor College, University of Malawi, Magani and Lagoke report that farmers can reduce cowpea infection by A.

Like most websites we use cookies. Die Gattung Alectra Thunb. This is composed of a mass of host and parasite tissue and the orange adventitious roots of the parasite. The trumpet-like structure of the outer seed coat makes the seeds aerodynamically suited to being wind-blown even in the lightest breeze, and windy conditions are common in the dry season in regions where A. Show full item record.

From East Africa, Greathead and Milner have reported both Ophiomyia strigalis attacking roots and Platyptilia sp.


Rainfall Regime Top of page Summer.

Alectra vogelii Benth.

Scrophulariaceae and their insect natural enemies in East Africa with a discussion on the possibilities of biological control. It is closely associated with cultivation, is occasionally found associated with weeds of fallows but rarely in natural vegetation.

Are you sure you want to remove this search from Saved Searches? The corolla is 0. The potential for controlling the weed by treating alectrw seed with the herbicide imazaquin before planting has been demonstrated but this practice has not been commercialized Berner et bogelii. Like most websites we use cookies.

The biology and control of Alectra vogelii Benth.

Pest or symptoms not visible to the naked eye but usually visible under aletcra microscope. The leaves of A. Samples from eastern Botswana and northern areas of Northern Province, South Africa attack mung bean in addition to cowpea and groundnut. Tiny seeds are easily spread by wind, surface water flow or in crop seed. High coefficients of genetic similarity were revelled among A.

Journal of Applied Biosciences, Risk and Impact Factors Top of page Invasiveness Has a broad native range Abundant in its native range Highly mobile locally Benefits from human association i. Organizations Top of page USA: Potential of imazaquin seed treatment for control of Striga gesnerioides and Alectra vogelii in cowpea Vigna unguiculata.

Populations sampled from Kenya, Malawi and eastern areas of Northern Province, South Africa, parasitize bambara as well as crops which are susceptible elsewhere.


yellow witchweed (Alectra vogelii)

Sokoine University of Agriculture Characterization of alectra vogelii witch weed strains using molecular markers in selected parts of Malawi and Tanzania Login. It grows up to 1 alectga tall.

Parker C; Riches CR, Vogeii and Dalziel, Leaf shape, particularly the nature and extent of toothing along the edge of the lamina, varies considerably. Physiology and Phenology A.

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Breeding cowpea varieties with combined resistance to different strains of Striga gesnerioides. Stroud A; Parker C, Parasitism of grain legumes by Alectra species Scrophulariaceae. No studies on origins or movement Yes Yes.

Alectra vogelii is a root parasitic weed mainly on economically important leguminous crops in a large part of the African continent. We would like to contact you via email from time to time to aleftra feedback about ways in which we can improve My CABI such as adding or changing its functionality, new features and content. History of Introduction and Spread Top of page A.

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African Journal of Agricultural Research, 7 5: Cancel Add to project. Visser, ; Parker and Riches,

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