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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 2, No. 4, 1994, pp. 419-421
Bioline Code: cs94053
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 2, No. 4, 1994, pp. 419-421

 en Spiralling Whitefly, Aleurodicus Dispersus check for this species in other resources , a Recent Invader and New Cassava Pest
Neuenschwander, P.

Abstract

The spiraling whitefly, Aleurodicus disperses check for this species in other resources Russell (Hom., Aleyrodidae), a native of Central America, was found in continental Africa for the first time early in 1992, and has since spread to five West and Central African countries. It is a polyphagous pest which causes substantial damage also on cassava. In mid-1993, two parasitoids, Encarsia check for this species in other resources sp. near haitiensis Dozier and E. guadeloupae Viggiani (Hym., Aphelinidae) were recovered from A. dispersus in Benin. They probably had arrived serendipitously. Wherever the whitefly spreads, initially damaging populations were observed. In coastal Benin, populations levels declined sharply in 1994. The necessity of introducing another biological control agent, the predator Nephaspis oculatus check for this species in other resources Blatchley (=amnicola Wingo) (Col., Coccinellidae), remains therefore unclear.

Keywords
Biological control, Encarsia spp., Nephaspis oculatus, whitefly

 
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