Credits: Biovision-Infonet Scientific Name: Cajanus cajan Order / Family: Fabales: Fabaceae Local Names: Swahili: Mbaazi Pests & Diseases: Aphids, Blister beetles, Bugs , Cercospora leaf spot, Cowpea seed beetle, Cutworms, Fusarium wilt, Jassids, Macrophomina stem canker, Phytophthora blight , Pod borers, Pod fly, Pod weevil, Powdery mildew, Root-knot nematodes, Rust, Spider mites, Termites, Thrips, Whiteflies Other pests: Purple witchweed Geographical Distribution in Africa General Information and Agronomic Aspects Pigeon pea is an important grain legume crop of […]
Monthly Archives: February 2020
Cowpea Information Source Links
Credits: Biovision-Infonet AIC, Nairobi, Kenya (2002). Field Crop Technical Handbook Abudulai, M., Shepard, B. M.,Salifu, A. B. (2003). Field evaluation of a neem (Azadirachta indica A. Juss)-based formulation Neemix(r) against Nezara viridula (L.) (Hemiptera: Pentatomidae) in cowpea. International Journal of Pest Management, Volume 49, Issue 2 April 2003, pages 109 – 113. www.tandfonline.com Alghali AM, (1993). Intercropping as a component in […]
Witchweed
(Striga hermonthica) Credits: Biovision-Infonet The parasitic weed witchweed (Striga gesnerioides) is also a problem in cowpea. What to do: Practise crop rotation. Practise fallow. Use resistant cultivars if available.
Quick Search Cowpea Diseases
Credits: Biovision-Infonet Cowpea Mosaic Diseases Damping-off Diseases Bacterial Blight Anthracnose Powdery Mildew Leaf Spots Brown Blotch Rust Cowpea Wilt Southern Blight Charcoal Rot
Southern Blight
(Sclerotium rolfsii) Credits: Biovision-Infonet It attacks roots and stems of cowpeas. The first visible symptom of southern blight is a progressive, yellowing and wilting of the foliage beginning on the lower leaves. The plant dies within a few days after the first symptoms appear. During warm, moist conditions, the coarse, white mycelium of the fungus […]
Cowpea Wilt
(Fusarium oxysporum f. sp. tracheiphilum) Credits: Biovision-Infonet Fusarium wilt usually causes the lower leaves on one side of the plant to turn yellow. Infected plants usually are stunted and wilted as the organism develops in the food and water conducting tissues. Brick red tissue can be observed in the stem when it is split lengthwise. […]
Cowpea Rust
(Uromyces vignae) Credits: Biovision-Infonet Small, reddish-brown pustules (blisters) appear on both upper and lower leaf surfaces. Rust can develop rapidly, resulting in severe leaf damage and defoliation. What to do: Use sulfur based products or potassium carbonate. Do not spray sulphur when it is hot, as it can burn the foliage and flowers.
Brown Blotch
(Colletotrichum truncatum) Credits: Biovision-Infonet The fungus causes pre-emergence and post-emergence damping off when infected seeds are planted. The former rots the seed before emergence from the soil while post-emergence kills the seedlings after emergence. The disease also attacks the foliage, stems and pods. Sunken, oval spots may be seen on stems; circular spots on leaves. […]
Cowpea Leaf Spots
(Cercospora sp., Aristastoma sp., Ascochyta sp., Colletotrichum sp., Stagnospora sp.) Credits: Biovision-Infonet Leaf spots are various sized often yellowish in colour or with a yellow halo, others brown to purplish; These normally develop first on lower leaves. With Cercospora leaf spot a dark, mouldy growth develops on the lower leaf surface corresponding to the spot. […]
Cowpea Bacterial Blight
(Xanthomonas axonopodis pv. vignicola) Credits: Biovision-Infonet This disease appears as tan to brown angular leaf spots with yellow margins on leaves, pods, and stems. It may cause severe defoliation during periods of high humidity. It is seed-borne. What to do: Use certified disease-free seeds. Avoid working in the fields when it is wet. Practise good […]