Various foods associated with cassava were tested for their effect on the development, fecundity and longevity of Euseius fustis, the most common phytoseiid species found on cassava in Africa. Euseius Justis developed successfully to adulthood on the spider mite prey species Mononychellus tanajoa...
Bruce-Oliver, S.J.
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Hoy, M.A.
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Yaninek, John S.
,
[Effect of some food sources associated with cassava in Africa on development success, fecundity, and longevity of Euseius fustis (Pritchard and Baker) (Acari: Phytoseiidae)]
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Effect of some food sources associated with cassava in Africa on development success, fecundity, and longevity of Euseius fustis (Pritchard and Baker) (Acari: Phytoseiidae)
Thirty isolates of Colletotrichum gloeosporioides f. sp. manihotis causal organism of cassava anthracnose disease (CAD), were collected from cankers on cassava stems in cassava-growing zones of Nigeria. Using a pathogenicity test, five virulent isolates (05FCN, 10FCN, 12FCN, 18FCN and 26FCN) were...
Fokunang, C.N.
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Ikotun, T.
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Dixon, A.
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[Mycelial growth, sporulation and spore germination of virulent Colletotrichum gloeosporiodes f. sp. manihotis isolates under selected growth conditions]
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Mycelial growth, sporulation and spore germination of virulent Colletotrichum gloeosporiodes f. sp. manihotis isolates under selected growth conditions
Leaf and root (tuber) nutrient uptake patterns of cassava (Manihot esculenta Crantz) alley-cropped with gliricidia (Gliricidia sepium), leucaena (Leucaena leucocephala), and senna [(Senna (syn. Cassia) siamea] as influenced by vesicular-arbuscular mycorrhizal (VAM) inoculation in a degraded Alfis...
Osonubi, O.
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Atayese, M.O.
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Mulongoy, K.
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[The effect of vesicular arbuscular mycorrhizal inoculation on nutrient uptake and yield of alley cropped cassava in a degraded Alfisol of southwestern Nigeria]
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The effect of vesicular arbuscular mycorrhizal inoculation on nutrient uptake and yield of alley cropped cassava in a degraded Alfisol of southwestern Nigeria
Field trials were carried out in M'Vuazi, Bas Zaire, to test the response of groundnuts (cv P43), planted sole or intercropped with cassava (cv Kinuani), to lime application. Groundnuts responded significantly to low rates of lime (250-500 kg ha-1). Maximum cost, benefit ratio of 1:7 was obtained...
Osiname, O.
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Muamba, T.
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[Response of groundnut (Arachis hypogaea L.) in sole crop and in intercrop with cassava (Manihot esculenta Crantz) to lime in an Ultisol in Bas Zaire]
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Response of groundnut (Arachis hypogaea L.) in sole crop and in intercrop with cassava (Manihot esculenta Crantz) to lime in an Ultisol in Bas Zaire
The effect of temperature, humidity and photoperiod on the development of Neozygites cf. floridana (Weiser and Muma) in the cassava green mite, Mononychellus tanajoa (Bondar) was studied in the laboratory. Dead infected mites began to appear 2.5 days after inoculation. At 33 and 28°C peak mortali...
Oduor, G.I.
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Moraes, G.J. de
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Yaninek, John S.
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Geest, L.P. van der
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[Effect of temperature, humidity and photoperiod on mortality of Mononychellus tanajoa (Acari: tetranychidae) infected by Neozygites cf. floridana (Zygomycetes: entomophthorales)]
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Effect of temperature, humidity and photoperiod on mortality of Mononychellus tanajoa (Acari: tetranychidae) infected by Neozygites cf. floridana (Zygomycetes: entomophthorales)
Primary data collected over a wide area in Africa show that average cassava root yield is not declining as the population increases because the land is being cultivated more intensively in response to demographic pressures. Although fallow periods are becoming shorter, organic manuring, improved ...
Nweke, F.
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Spencer, D.
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[Future prospects for cassava root yield in sub Saharan Africa]
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Future prospects for cassava root yield in sub Saharan Africa
Reproductive responses of Neoseiulus (= Amblyseius) idaeus Denmark and Muma ovipositing females were measured under three dietary regimes consisting of Mononychellus tanajoa (Bondar) or Oligonychus gossypii (Zacher) combined with specific periods (24, 48, 72, and 96 h) of starvation or periods of...
Megevand, B.
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Tanigoshi, L.K.
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[Effects of prey deprivation on life table attributes of Neoseiulus idaeus Denmark and Muma (Acari: phytoseiidae)]
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Effects of prey deprivation on life table attributes of Neoseiulus idaeus Denmark and Muma (Acari: phytoseiidae)
In uninfested fields, 80 cassava tips were artificially infested with 0, 1, 2, 4, 8, 16, 32, or 64 third instars, and 20 or 100 eggs of cassava mealybug, Phenacoccus manihoti Matile‐Ferrero (Hom., Pseudococcidae). Another 80 uninfested tips served as a control. Tips were arranged in a circle of 2...
Neuenschwander, P.
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Ajuonu, O.
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[Measuring host finding capacity and arrestment of natural enemies of the cassava mealbug, Phenacoccus manihoti, in the field]
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Measuring host finding capacity and arrestment of natural enemies of the cassava mealbug, Phenacoccus manihoti, in the field
Surveys of the incidence of African cassava mosaic disease (ACMD) and its whitefly vector, Bernisiu tabaci, were made at three-month intervals in 1992 and 1993 along two South-North transects. One was in central and the other in eastern Uganda. ACMD incidence was high within the northern localiti...
Legg, J.P.
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Ogwal, S.
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[Changes in the incidence of African cassava mosaic geminivirus and the abundance of its whitefly vector along southnorth transects in Uganda]
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Changes in the incidence of African cassava mosaic geminivirus and the abundance of its whitefly vector along southnorth transects in Uganda