Yield response of field‐grown cowpea ( Vigna unguiculata (L.) Walp.) varieties to Bradyrhizobium inoculation

Grain legumes are an important component of the food systems in Malawi. The parasitic legume witchweed species Alectra vogelii (Benth) is among the problem pests with serious infestations in groundnuts (Arachis hypogea), soybeans (Glycine max), cowpeas (Vigna unguiculata) and other legumes. A study was conducted in 2013/14 and ‘14/15 seasons to evaluate the effects of three cowpea varieties (IT82E-16, Sudan 1 and Alectra-resistant Mkanakaufi) and fertilizer practices (no fertilizer applied, 5 t ha-1 cattle manure and 100 kg ha-1 of inorganic 23:21:0+4S on cowpea grain yield, yield components and Alectra emergence at three sites in central Malawi. Cowpea grain yields ranged 400-2400 kg ha-1. There were significant (P < 0.05) variety effects on yield in 4 of 6 site-years, with variety IT82-16 consistently giving the highest yields (range 1200-2400 kg ha-1). There were significant variety effects on A. vogelii emergence with Mkanakaufiti having no Alectra throughout. Application of cattle manure strongly suppressed A. vogelii in 6 site-years all at 60 days after planting, while inorganic fertilizer suppressed Alectra in 3 of the 6 site-years. Cattle significantly but marginally (about 250 kg ha-1) increased yield in 2 of the 6 site-years. The results show potential to suppress A. vogelii with cattle manure application. However, further studies are required to understand the causes of the limited yield response under manure or fertilizer application to make the practices attractive to farmers. More variety improvement studies to produce a range of varieties with better local adaptability and response to fertility amendments are recommended.

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Yield response of cowpea, Vigna unguiculata L. (Walp), to infestation of Aspavia armigera F. (Hem., Pentatomidae)

Journal of Applied Entomology ◽

10.1111/j.1439-0418.2007.01209.x ◽

2007 ◽

Vol 131 (9-10) ◽

pp. 704-708 ◽

Cited By ~ 1

Author(s):

O. O. R. Pitan ◽

S. I. I. Odubiyi ◽

G. O. Olatunde

Keyword(s):

Vigna Unguiculata ◽

Yield Response

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Developing crop production functions of wheat using experimentally determined yield response factors

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v32i2.300 ◽

2007 ◽

Vol 32 (2) ◽

Author(s):

M.S. Islam ◽

M.A Hossain ◽

M. Abdullah ◽

ME Hossain

Keyword(s):

Crop Production ◽

Production Functions ◽

Yield Response ◽

Response Factors

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Comportamento de genótipos de feijão-caupi (Vigna unguiculata L. Walp., Fabaceae) sob infestação de Empoasca sp. (Hemiptera: Cicadellidae) e Liriomyza sp. (Diptera: Agromyzidae) em Redenção, Ceará, Brasil

Paubrasilia ◽

10.33447/paubrasilia.v3i1.21 ◽

2020 ◽

Vol 3 (1) ◽

pp. 18-23

Author(s):

Francisca Arila Maciel de Souza Xavier ◽

João Gutemberg Leite Moraes ◽

Marcos Levi Saraiva Silva ◽

Rufino Barreto de Matos Neto ◽

Damila de Oliveira Firmino ◽

...

Keyword(s):

Vigna Unguiculata

O feijão-caupi (Vigna unguiculata L. Walp.) é uma fabácea utilizada como fonte alimentar em diversos países da África, Ásia e Américas. Objetivou-se, com esta pesquisa, avaliar o comportamento de genótipos de feijão-caupi ao ataque de cigarrinha-verde (Empoasca sp.) e de minador (Liriomyza sp.). O experimento foi conduzido na Fazenda Experimental Piroás da Universidade da Integração Internacional da Lusofonia Afro-Brasileira (Unilab), nos meses de agosto a outubro de 2018, onde se utilizou o delineamento experimental em blocos ao acaso, com 15 tratamentos e quatro repetições. Para a cigarrinha, foi avaliado o número de indivíduos por planta na parcela útil, aleatoriamente, uma vez na semana, ao longo de nove semanas. Já para a minadora, foi avaliada a frequência de minas, na parcela útil e ao acaso, ao longo de quatro semanas. Os dados acumulados na última amostragem foram transformados [(x + 0,5)1/2] e submetidos à análise de variância, sendo as médias comparadas pelo teste Scott-Knott. Os genótipos BRS Juruá, BRS Marataoã, Rabo de Soin, BRS Guariba, BR 17 Gurguéia, BRS Xiquexique, BRS Potengi, BRS Aracê, BRS Cauamé, BRS Imponente, BRS Itaim, BRS Tumucumaque e Vita-7 foram menos suscetíveis ao ataque de Empoasca sp., enquanto que BRS Aracê, Rabo de Soin e Vita-7 foram menos atacados por Liriomyza sp.

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Farmers’ preference for improved grasses and legume forage species in six mixed farming system districts of southern region of Ethiopia

Agricultural science and practice ◽

10.15407/agrisp4.02.023 ◽

2017 ◽

Vol 4 (2) ◽

pp. 23-27

Author(s):

Mergia Abera ◽

Tekleyohannes Berhanu

Keyword(s):

Vigna Unguiculata ◽

Vegetative Growth ◽

Farming System ◽

Elephant Grass ◽

Lablab Purpureus ◽

Forage Legumes ◽

Forage Crops ◽

Forage Species ◽

Herbage Yield ◽

Chloris Gayana

Participatory on-farm evaluation of improved forage crops was conducted in six mixed farming system districts of Southern Ethiopia with the objective to identify farmers preferred forage crops (legumes and grasses). Two annual forage legumes (Vigna unguiculata L. (cow pea) and Lablab purpureus (L.), two perennial legumes (Medicago sativa (L.) (alfalfa) and Desmodium intortum (Mill.) Urb. (green-leaf)), and three perennial grasses (Chloris gayana Knuth (Rhodes grass) and two Pennisetum purpureum Schumach (elephant grass) accessions (No.16800 and 16798)) were evaluated in the study. The major farmers’ criteria considered in the evaluation of forage species were vegetative growth, herbage yield, tillering, protection of soil erosion, palatability, perfor- mance under dry weather conditions, performance in marginal area under low input management, multipurpose use (conservation and soil fertility) and fast growing condition. The study showed that elephant grass accession No. 16798, 16800 and Chloris gayana adapted well and farmers preferred them for their higher herbage yield, vegetative growth, tillering ability and drought resistance. Even though the annual forage legumes Lablab purpureus and Vigna unguiculata were superior in their forage yield, the farmers preferred the perennial forage legumes (Desmodium intortum and Medicago sativa) mainly for their performance under dry weather condi- tion due to their longer growth period. Therefore, the consideration of farmers’ preference for forage crops is crucial for increased adoption of improved forage crops in the region.

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