Archives of Phytopathology and Plant Protection (2006) 39, 231-237

A.M. Oparaeke, M.C. Dike and C.I. Amatobi (2006)
Toxicity of crude extracts of Nigerian spices to post flowering insect pests of cowpea [Vigna unguiculata (L.)]
Archives of Phytopathology and Plant Protection 39 (3), 231-237
Abstract: The efficacy of crude aqueous extracts of Piper guineense Thonn and Schum, Aframomum melegueta Schum, Xylopia aethiopica (Dunal) A. Richard, Zingiber officinarum L. and Capsicum annum L. was evaluated for the control of legume flower bud thrips on cowpea. These extracts were applied at 10% and sprayed once weekly for four weeks during 1997, 1998 and 1999 cropping seasons. The extracts reduced the population of thrips and gave significant (p < 0.05) protection to cowpea flowers compared to the untreated control during the three years cropping seasons. Pod production was significantly higher (p < 0.01) on plots treated with P. guineense, followed by A. melegueta extracts. This study highlights the potentials of crude aqueous extracts of P. guineense and A. melegueta as biopesticides for thrips control on cowpea flowers. This technology is safe, easy to adopt, environmentally friendly and cheap.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): A.M. Oparaeke

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Clavigralla tomentosicollis	Cowpea and relatives (Vigna)	Nigeria