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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Artículo de revista

Protection of cowpea, Vigna unguiculata L. (Walp.) with Newbouldia laevis (Seem.) extracts against infestation by Callosobruchus maculatus (Fabricius)  [2013]

Ashamo, Michael Oluwafemi; Odeyemi, Olusola Olasunbo; Ogungbite, Olaniyi Charles;

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Evaluation of protectant ability of Newbouldia laevis (Seem.) extracts against infestation by Callosobruchus maculatus in cowpea, Vigna unguiculata L. (Walp.) was carried out in the laboratory at ambient temperature of 28 ± 2 °C and 70 ± 5% relative humidity. Extracts from wood ash, leaf, stem and root bark were tested at different concentrations of 0, 1, 2, 3, 4 and 5%. One hundred per cent mortality of adult beetles was achieved at all concentrations within 72 h of treatment with extracts except in wood ash at 1% concentration, but they were significantly different (p < 0.05) from the controls. All the extracts were still able to cause high beetle mortality after one, two and three months of cowpea storage at high concentrations (4 and 5%) except wood ash, although there was a slight decrease in mortality during the period of storage. All the extracts significantly (p < 0.05) reduced oviposition and adult emergence of C. maculatus when compared with the controls although the reduction was higher at 5% concentration than others. Adult beetle emergence was completely prevented at higher concentrations (4 and 5%) except in wood ash. Both oviposition and adult emergence increased during the months of storage probably because of the slight reduction in the effectiveness of the extracts. The root bark extract was much more effective in reducing oviposition and adult emergence than others throughout the period of storage. The plant extracts of N. laevis was abl
e to protect the cowpea seeds from damage and prevent weight loss. Cowpea seed damage and weight loss was significantly more (p < 0.05) in the controls than other for the three-month duration probably because of the more adult emergence. The extracts from N. laevis did not adversely affect the germination of the protected seeds and seed germination ranged from 86.7 to 100%. It has been shown in this study that the extracts of N. laevis were effective against C. maculatus in cowpea although the root bark extract seemed to be the most effective while the wood ash extract was least effective. Their effectiveness, however, slightly decreased during the period of storage. N. laevis could be incorporated into pest management of stored cowpeas since the products are ecologically safe.
Publicación
Archives of phytopathology and plant protection
ISSN : 1477-2906

Información bibliográfica

Idioma:
English
Tipo:
Journal Article
En AGRIS desde:
2015
Volumen:
46
Edición:
11
Página inicial:
1295
Página final:
1306
Editorial:
Routledge
Todos los títulos:
"Protection of cowpea, Vigna unguiculata L. (Walp.) with Newbouldia laevis (Seem.) extracts against infestation by Callosobruchus maculatus (Fabricius)"@eng
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Información bibliográfica

Idioma:
English
Tipo:
Journal Article
En AGRIS desde:
2015
Volumen:
46
Edición:
11
Página inicial:
1295
Página final:
1306
Editorial:
Routledge
Todos los títulos:
"Protection of cowpea, Vigna unguiculata L. (Walp.) with Newbouldia laevis (Seem.) extracts against infestation by Callosobruchus maculatus (Fabricius)"@eng