Relative importance of harvest index (I) and total biomass yield (B) to economic yield (Y) was assessed in several food crops at different levels of environmental productivity. Importance of B is generally higher in low than high yielding environments, while that of I is higher in high than low y...
Kawano, K
,
[Harvest index and evolution of major food crop cultivars in the tropics]
,
Harvest index and evolution of major food crop cultivars in the tropics
The effect of methionine supplementation to diets conatining high levels (~ 65%) of cassava meal (CM) were studied with gestating and lactating gilts as well as with growing-finishing pigs. In both experiments, methionine supplementation did not improve (P>.05) the results obtained with the unsup...
Gómez G., Guillermo G.
,
Santos, J
,
Valdivieso Garcia, Mauricio A.
,
[Evaluation of methionine supplementation to diets containing cassava meal for swine]
,
Evaluation of methionine supplementation to diets containing cassava meal for swine
Chemical exclusion of predators with permethrin was used to test the effectiveness of the phytoseiid predator Amblyseius limonicus Garman and McGregor and a complex of minor predators in the biological control of tetranychid (Mononychellus spp., Tetranychus spp., and Oligonychus peruvianus McGreg...
Braun, Ann R.
,
Bellotti, Anthony C.
,
Guerrero, JM
,
Wilson, LT
,
[Effect of predator exclusion on cassava infested with tetranychid mites (Acari: Tetranychidae)]
,
Effect of predator exclusion on cassava infested with tetranychid mites (Acari: Tetranychidae)
A series of trials were carried out using cassava. Crop growth rate increased with leaf area up to LAI 4; root growth rate increased up to LAI 3-3.5, then declined. LAI is determined by leaf size, leaf formation rate and individual leaf life. Leaf size reached a max 4 mo after planting and then d...
Cassava vegetative material is distributed by sending seedlings obtained from meristem cultures in test tubes. Although this material is accepted worldwide, losses occur due to seedling weakness and the delay to obtain adult seedlings in the field (normally between 3 and 4 yr). To overcome this p...
Lozano, J.C.
,
Laberry, R.
,
[Nuevo metodo para transporte de material vegetativo indexado de yuca (Manihot esculenta Crantz)]
,
Nuevo metodo para transporte de material vegetativo indexado de yuca (Manihot esculenta Crantz)
Oviposition by the cassava hornworm,Erinnyis ello L., was quantified for upper (abaxial) and lower (adaxial) leaf surfaces of cassava in the department of Tolima, Colombia. Relative rates of egg parasitism byTelenomus sphingis Ashmead on the different leaf surfaces were determined and compared. A...
Gold, CS
,
Altieri, Miguel A.
,
Bellotti, Anthony C.
,
[Relative oviposition rates of the cassava hornworm, Erinnyis ello (Lep.: Sphingidae), and accompanying parasitism by Telenomus sphingis (Hym.: Scelionidae), on upper and lower leaf surfaces of cassava]
,
Relative oviposition rates of the cassava hornworm, Erinnyis ello (Lep.: Sphingidae), and accompanying parasitism by Telenomus sphingis (Hym.: Scelionidae), on upper and lower leaf surfaces of cassava
Cassava (Manihot esculenta Crantz) is a staple food for a large sector of human population in the tropics. It is widely produced for its starchy roots by small farmers over a range of environments on poor infertile soils with virtually no inputs. It is highly productive under favorable conditions...
Comprehensive author and subject indexes of the Cassava Newsletter, a periodic publication that disseminates the main research results of the cassava researchers` network, are presented for the period 1977-89. (CIAT)
Menendez F, L
,
[Yuca boletin informativo : Indices de autores y materias 1977-1989]
,
Yuca boletin informativo : Indices de autores y materias 1977-1989