Tsetse fly populations have been monitored since January 1986 in two areas of the Ghibe valley in southwest Ethiopia, in order to assess trypanosomiasis risk to cattle. The two study areas are Abelti/Ghibe and Gullele/Tolley. Two species of tsetse fly were detected in the valley from 1986 to 1992...
Leak, S.G.A.
,
Mulatu, W.
,
[Advance of Glossina morsitans submorsitans and G. pallidipes along the Ghibe-river system in southwest Ethiopia]
,
Advance of Glossina morsitans submorsitans and G. pallidipes along the Ghibe-river system in southwest Ethiopia
The effectiveness of the exotic South American hymenopterous parasitoid Epidinocarsis lopezi (De Santis) in controlling the cassava mealybug (CM), Phenacoccus manihoti Matile-Ferrero, in southwestern Nigeria, was assessed using emergence samples. Ten infested cassava tips were collected from each...
Neuenschwander, P.
,
Hammond, W.N.O.
,
[Natural enemy activity following the introduction of Epidinocarsis lopezi (Hymenoptera: encyrtidae) against the cassava mealybug, Phenacoccus manihoti (Homoptera: psudococcidae), in southwestern Nigeria]
,
Natural enemy activity following the introduction of Epidinocarsis lopezi (Hymenoptera: encyrtidae) against the cassava mealybug, Phenacoccus manihoti (Homoptera: psudococcidae), in southwestern Nigeria
Evaluation of mechanisms of resistance among 12 grain sorghum, Sorghum bicolor (L.) Moench, sources of resistance to the biotype E greenbug, Sehizaphis graminum (Rondani), indicated that the most important mechanism within this germplasm seemed to be antibiosis (with a few exceptions). The source...
Dixon, O.A.G.
,
Bramel-Cox, P.J.
,
Reese, J.C.
,
Harvey, T.L.
,
[Mechanisms of resistance and their interactions in twelve sources of resistance to biotype E greenbug (Homoptera: Aphididae) in sorghum]
,
Mechanisms of resistance and their interactions in twelve sources of resistance to biotype E greenbug (Homoptera: Aphididae) in sorghum
A laboratory screening method was developed for evaluating resistance of cowpea, Vigna unguiculata (L.) Walp, to Clavigralla tomentosicollis Stål. The technique uses dry cowpea seeds, which were judged better than fresh seeds or fresh pods, to identify protracted nymphal development and high coho...
Jackai, L.E.N.
,
[Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae)]
,
Screening of cowpeas for resistance to Clavigralla tomentosicollis Stal (Hemiptera: Coreidae)
The feeding behavior of biotype E greenbug, Schizaphis graminum (Rondani), on seedlings of sorghum, Sorghum bicolor (L.) Moench, genotypes with various levels and mechanisms of seedling resistance was examined in a 12-h period with a computerized electronic insect feeding monitor. Results indicat...
Dixon, Alfred G.O.
,
Bramel-Cox, P.J.
,
Reese, J.C.
,
[Feeding behaviour of biotype E greenbug (Homoptera: Aphididae) and its relationship to resistance in sorghum]
,
Feeding behaviour of biotype E greenbug (Homoptera: Aphididae) and its relationship to resistance in sorghum
This work provides a preliminary inventory of West African Coccinellidae.
This was based on the West African Coccinellidae (WAC) specimens in the holdings of insect collections at the Laboratoire de Zoologie des Invertébrés Terrestres at the Institut Fondamental d’Afrique Noire Cheikh Anta Diop ...
Hounkpati, K.
,
McHugh, J.V.
,
Niang, A.A.
,
Goergen, G.
,
[Documenting museum records of west African Coccinellidae (Coleoptera) in Benin and Senegal]
,
Documenting museum records of west African Coccinellidae (Coleoptera) in Benin and Senegal
Cock, Matthew J.W.
,
Biesmeijer, Jacobus C.
,
Cannon, Raymond J.C.
,
Gerard, Philippa J.
,
Gillespie, Dave
,
Jiménez, Juan J.
,
Lavelle, Patrick M.
,
Raina, Suresh K.
,
[The positive contribution of invertebrates to sustainable agriculture and food security]
,
The positive contribution of invertebrates to sustainable agriculture and food security
Opuntia scrublands are important ecological-economic systems in the Andean area. They perform a major role protecting slopes against erosion, improving the soil properties and providing a variety of products employed in the human diet, and in animal feeding, as well as cochineal insects, a highly...
Rodríguez, L.C.
,
Pascual, U.
,
Niemeyer, H.M.
,
[Local identification and valuation of ecosystem goods and services from opuntia scrublands of Ayacucho, Peru]
,
Local identification and valuation of ecosystem goods and services from opuntia scrublands of Ayacucho, Peru
Bystricky, M.
,
Schultze-Kraft, Rainer
,
Peters, Michael
,
[Studies on the pollination biology of the tropical forage legume shrub Cratylia argentea]
,
Studies on the pollination biology of the tropical forage legume shrub Cratylia argentea
Aphid landing rates were monitored with horizontal mosaic green pan traps in monocultures of soybean, Glycine max (L.) Merrill, and in additive mixtures of soybean with dwarf or tall isolines of sorghum, Sorghum bicolor (L.) Moench. Rhopalosiphum maidis (Fitch) colonized sorghum whorls and was th...