Transgenic cowpea (Vigna unguiculata) seeds expressing a bean α-amylase inhibitor 1 confer resistance to storage pests, bruchid beetles

2008 ◽  
Vol 27 (12) ◽  
pp. 1841-1850 ◽  
Author(s):  
Siva Kumar Solleti ◽  
Souvika Bakshi ◽  
Jubilee Purkayastha ◽  
Sanjib Kumar Panda ◽  
Lingaraj Sahoo
Keyword(s):  
Vigna Unguiculata ◽  
Storage Pests ◽  
Amylase Inhibitor ◽  
Transgenic Cowpea ◽  
Bruchid Beetles

scholarly journals Competition in the Parasitization of Callosobruchus maculatus between Dinarmus basalis and Choetospila elegans on Vigna unguiculata (Walp.) Seeds

2012 ◽  
Vol 2 (1) ◽  
pp. 92
Author(s):  
Umoetok S. B. A. ◽  
Ukeh D. A. ◽  
Udo I. A. ◽  
Ekanem M. ◽  
Iloba B. N
Keyword(s):  
Vigna Unguiculata ◽  
Callosobruchus Maculatus ◽  
Pearson Correlation ◽  
Management Strategies ◽  
Negative Relationship ◽  
Positive Association ◽  
Storage Pests ◽  
Early Introduction ◽  
C Elegans ◽  
Dinarmus Basalis

<p>Laboratory study was carried out to investigate the efficacy of hymenopteran parasitoids, (<em>Dinarmus basalis</em> and <em>Choetospila elegans)</em> parasitization of <em>Callosobruchus maculatus</em> on cowpea (<em>Vigna unguiculata</em>) seeds in the Department of Crop Science, University of Calabar, Nigeria. Treatments were the inoculation of <em>D. basalis</em> (sole), <em>C. elegans</em> (sole), a mixture of <em>D. basalis</em> and <em>C. elegans</em> into infested cowpea seeds and the control which received no parasitoids. The introduction of parasitoids was repeated at 3 d interval, and all treatments were replicated 3 times. Result indicated that early introduction of the parasitoids caused significantly (P ? 0.05) higher mortality of <em>C.maculatus</em> than late introduction. Mix culture of both parasitoids was significantly more efficacious than sole culture. The emergence of each parasitoid and the mortality of <em>C. maculatus</em> in sole culture showed a highly significant (P ? 0.01) positive relationship (r = 0.487) between <em>C. maculatus</em> and <em>D. basalis</em> but non-significant (P ? 0.05) though positive association (r = 0.289) with <em>C. elegans</em>. A multiple regression analysis between <em>C. maculatus </em>mortality and the emergence of the two parasitoids in mix culture also indicated a highly positive significant (P ? 0.01) relationship (R = 0.751, R<sup>2</sup> = 0.564). Pearson Correlation analysis also showed a significant (P ? 0.05) positive association (r = 0.464, and 0.401) between <em>C. maculatus</em> mortality and emergence of <em>C. elegans</em> and <em>D. basalis</em> in mix culture, respectively. However, a non significant (P ? 0.05) negative relationship (r = -0.336) was observed between the two parasitoids in their emergence in mix culture, but <em>D. basalis</em> contributed more to the mortality of <em>C. maculatus</em> than <em>C. elegans</em>. Data from this study showed that <em>D. basalis</em> and <em>C. elegans</em> have potentials to be deployed as biological control entities in the management of <em>C. maculatus</em> as a part of the integrated pest management strategies of storage pests in the tropics.</p>

scholarly journals Varietal Susceptibility of Improved Cowpea Vigna unguiculata (L.) (Walp.) Cultivars to Field and Storage Pests

2014 ◽  
Vol 3 (2) ◽  
pp. 69 ◽  
Author(s):  
P. K. Baidoo ◽  
M. B. Mochiah
Keyword(s):  
Vigna Unguiculata ◽  
Natural Enemies ◽  
Weight Reduction ◽  
Block Design ◽  
Control Measures ◽  
Storage Pests ◽  
Improved Varieties ◽  
Local Variety ◽  
Cowpea Varieties ◽  
And Storage

<p>Cowpea, <em>Vigna unguiculata</em> is widely cultivated in the tropics and subtropics as food for man and livestock. The crop is highly prone to pests and diseases which limit its production. Resistant cowpea varieties have become increasingly important in the management of both field and storage pests. Three improved cowpea varieties and one local variety were screened for their susceptibility to field and storage pests. The experiment was conducted in a randomized complete block design with four treatments and three replications. The different pests infesting the plants were identified and counted. Aphids and thrips were scored on a scale of 0-5, depending on the levels of infestations. Natural enemies’ numbers, leaf damage, pod damage and yield were assessed. <em>Callosobruchus maculatus</em> infestations during storage and weight reduction were determined over a six week period. Aphids and <em>M. sjostedti</em> score, <em>M. virtrata</em> and <em>Empoasca</em> sp. numbers did not differ significantly; however, significantly more pod sucking bubs attacked the local variety than the improved varieties. Natural enemies’ numbers on the various cultivars did not differ significantly. Yield was however significantly better in the improved varieties. The local variety suffered the largest weight reduction (20.91%) during storage while Nhyira suffered the least weight reduction of 4.23%. The use of improved varieties and application of pests’ control measures will increase cowpea production in Ghana.</p>

Successful recovery of transgenic cowpea (Vigna unguiculata) using the 6-phosphomannose isomerase gene as the selectable marker

2012 ◽  
Vol 31 (6) ◽  
pp. 1093-1103 ◽  
Author(s):  
Souvika Bakshi ◽  
Bedabrata Saha ◽  
Nand Kishor Roy ◽  
Sagarika Mishra ◽  
Sanjib Kumar Panda ◽  
...  
Keyword(s):  
Vigna Unguiculata ◽  
Selectable Marker ◽  
Phosphomannose Isomerase ◽  
Successful Recovery ◽  
Transgenic Cowpea

Transgenic Pea Seeds Expressing the α-Amylase Inhibitor of the Common Bean are Resistant to Bruchid Beetles

1994 ◽  
Vol 12 (8) ◽  
pp. 793-796 ◽  
Author(s):  
Richard E. Shade ◽  
Hartmut E. Schroeder ◽  
José J. Pueyo ◽  
Linda M. Tabe ◽  
Larry L. Murdock ◽  
...  
Keyword(s):  
Common Bean ◽  
Amylase Inhibitor ◽  
The Common ◽  
Pea Seeds ◽  
Bruchid Beetles

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 ◽  
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.

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

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.

RENDIMENTO DE CULTIVARES DE CAUPI (Vigna unguiculata L Walp.) SUBMETIDAS À DIFERENTES LÂMINAS DE IRRIGAÇÃO

Irriga ◽  
1999 ◽  
Vol 4 (3) ◽  
pp. 139-144 ◽  
Author(s):  
Gianini Peixoto Bezerra Lima ◽  
José Vanglesio de Aguiar ◽  
Raimundo Nonato Távora Costa ◽  
Vital Pedro da Silva Paz
Keyword(s):  
Vigna Unguiculata ◽  
Irrigation System ◽  
Northeast Brazil ◽  
Marginal Product ◽  
Applied Water ◽  
Cowpea Cultivars ◽  
The North ◽  
Significant Difference ◽  
Caixa Postal ◽  
Water Depths

RENDIMENTO DE CULTIVARES DE CAUPI (Vigna unguiculata L Walp.) SUBMETIDAS À DIFERENTES LÂMINAS DE IRRIGAÇÃO1       Gianini Peixoto Bezerra Lima José Vanglesio de Aguiar Raimundo Nonato Távora Costa Universidade Federal do Ceará – Departamento de Engenharia Agrícola. Campus do Pici. Bloco 804. CEP 60455-760 – Fortaleza-CE Vital Pedro da Silva Paz Escola Superior de Agricultura Luiz de Queiroz – Departamento de Engenharia Rural, bolsista da FAPESP. Av. Pádua Dias, 11 – Caixa Postal 11. 13418-900 – Piracicaba-SP       1 RESUMO       O caupi é um dos cultivos mais tradicionais do Norte e Nordeste do Brasil, constituindo alimento básico nestas regiões. Com este trabalho foi possível estabelecer relações entre a quantidade de água aplicada e produtividade de grãos, para três variedades de feijão caupi submetidas a diferentes lâminas de água. Para caracterização das lâminas de água foi utilizado um sistema de irrigação por aspersão convencional em linha. O controle da irrigação foi realizado a partir de tensiômetros instalados à 15 cm de profundidade. Os resultados mostraram que: i) a cultivar João Paulo II apresentou melhores resultados de produtividade para as lâminas de água aplicadas que variaram de T1 = 291,8 mm a T5 = 141,2 mm; ii) sob condições de reduzida disponibilidade de água, ou seja, menor lâmina aplicada, não ocorreu diferença estatística  para a produtividade entre as cultivares estudadas; e iii) para as condições do estudo, a cultivar Setentão apresentou a menor taxa de redução do produto marginal.       UNITERMOS: caupi, irrigação, função de produção       LIMA, G. P. B., AGUIAR, J. V., COSTA, R. N. T., PAZ, V. P. S. Responses OF cowpea cultivars (Vigna unguiculata L Walp) at differents irrigation deficits     2 ABSTRACT       The caupi is one of the most traditional cultivation of the north and northeast - Brazil, constituting a basic food in these areas. With this work it was possible to establish relationships between the amount of water applied and productivity of grains, for three caupi varieties submitted to different irrigation sheets. To diferentiate water depths in the irrigation system, the aspersion in line was used. The control of the irrigation was accomplished using tensiometers installed to 15 cm of depth. The results showed that: i) the João Paulo II variety presented better productivity for the applied water depths; ii) under reduced conditions of water avai lability for study conditions, these was no significant difference in the productivity reached among the cultivars studied; and iii) for the conditions of the study, the variety Setentão presented the smallest rate of reduction of the marginal product.       KEYWORDS: cowpea, irrigation, production function  

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