Beans Africa
001
Baert, T.G. La multiplication, la diffusion et l'impact d'une nouvelle variété.
En: Nyabyenda, Pierre; Scheidegger, Urs C. (comps.)6. Seimaire Regional Sur
l'Amélioration du Haricot dans la Region des Grands Lacs. Kigali (Rwanda). 25-25 Jan
1991. Actes. Butare (Rwanda). Centro Internacional de Agricultura Tropical, Programme
Régional pour l'Amélioration du Haricot dans la Région des Grands Lacs ; Institut des
Sciences Agronomiques du Rwanda. 1991. p. 163-169. CIAT African workshop series ; no. 17.
[60892]
002
David, Soniia; Wortmann, Charles S.; Kasozi, S.; Mughisha- Mutetikka, M. La
multiplication, la diffusion et l'impact d'une nouvelle variété.
[Multiplication, diffusion and impact of a new variety]. In: 6. Seimaire Regional Sur
l'Amélioration du Haricot dans la Region des Grands Lacs. Kigali (Rwanda). 25-25 Jan
1991. Actes. Centro Internacional de Agricultura Tropical, Programme Régional pour
l'Amélioration du Haricot dans la Région des Grands Lacs; Institut des Sciences
Agronomiques du Rwanda, Butare (Rwanda). (CIAT African workshop series; no. 17). p.
163-169. (60892).
The var. Kaki (A 410) has had a certain success with the farmers from
Imbo-Nord with whom ISABU had conducted trials. Yet diffusion of this var. is still very
limited. By this sub-project, the means of making multiplication and diffusion of a new
var. more efficient are being studied. Seed multiplication by some farmers- multipliers
did not present any problems. Seed distribution, if well integrated into a commercial
network (cooperative) succeeds in making the var. known by many farmers. After a
multiplication with 10 farmers during 2 seasons, the var. is already known by a third of
the population in the zone and used by a fifth of this population.
003
David, Soniia; Wortmann, Charles S.; Kasozi, S.; Mughisha-Mutetikka, M. 1995. Using
trial follow-up surveys to assess varietal adoption : the case of beans. Manuscript.
In press.
004
Grisley, William; Mwesigwa, D.; Kisakye, J.. 1993. Adoption of climbing beans
following the introduction of new varieties from on-farm trials in the Kabale Distr.
In: [s.p.i.]. Kawanda Agricultural Research Institute, Kampala (Uganda). p. 174-189.
(60895)
005
Hoogendijk, M.; David, Soniia. 1996. The indigenous climbing bean system in Mbale
Distric of Uganda with emphasis on the adoption of new vareities and genetic diversity.
Manuscript. In press.
006
Mafuru, J.M.; Mukandala, L.; Maimu, J.; Bosch, Chris. [1995]. The adoption and
diffusion of Lyamungu-90 bean variety in Kagera region, Tanzania. Centro
Internacional de Agricultura Tropical, Regional Beans Programme. Arusha (Tanzania). Field
note ; no. 58. 16 p. (SB 327 .M338)
This survey was conducted during 1994/95 season in three districts in
Kagera Region. The main objective was to assess the performance of Lyamungu-90 beans after
three years since 1992 when it was first distributed to farmers. A total of 94 farmers was
selected from a list of those who received seeds of Lyamungu-90. Eight villages were
visited during the survey. Also, ten village extension officers and eighteen beans traders
were interviewed using a questionnaire. Descriptive statistics and a multiple regression
model were used to analyse the data. Results show that 71 percent of the respondents are
still growing Lyamungu-90, and most of them would like to grow more of it. The new variety
has been grown during both short and long rains with more quantities being grown in the
short rains. Of the three districts, Lyamungu-90 has been accepted more in Karagwe
District followed by Bukoba Rural and lastly Muleba. The reasons being earlier acceptance
of Lyamungu-85 in Karagwe which is similar to Lyamungu-90. Farmers appreciate Lyamungu-90
because of its palatability, high yield and early maturity. Other features are good market
and tolerance to heavy rains. The only negative aspect mentioned by farmers is
vulnerability to storage pests (bruchids). Similar response was obtained from
extensionists and beans traders. Seeds are mainly distributed through giving gifts to
relatives and friends. The transfer model is said to be demand-driven since seeds are
given only when asked for by others. The effectiveness of this model depends on seed
availability and level of awareness in the village/area. Market potential is not yet an
important aspect of Lyamungu-90 in Bukoba and Muleba Districts but it is important in
Karagwe. The only socio-economic factor having significant positive effect on the
diffusion of Lyamungu-90 was seed availability. This reflects the need to establish seed
distribution programmes to ensure adequate supply. Also, to speed up the demand there is a
need to embark on awareness raising strategies such as using already existing Lyamungu-90
extension leaflet developed jointly by FSR programme and beans section at Maruku research
Institute to inform farmers on characteristics of the new variety. Furthermore,
recommendations on beans storage methods should be demonstrated to farmers for adoption.
007
Ndakidemi, P.A.; Mushi, Clemence S. 1996. The adoption of Lyamungu 85 and Lyamungu
90 in Lushot District : draft report. In press.
008
Nkonya, E. 1995. The adoption of Lyamungu 85 in Northern Tanzania : preliminary
report. In press.
009
Sperling, Louise; Loevinsohn, Michael E. The dynamics of adoption : distribution
and mortality of bean varieties among small farmers in Rwanda. Agricultural
Systems (United Kingdom) v. 41(4) p. 441-453 En.
This study analyzes the dynamics of farmer-to-farmer distribution, the
primary means by which new bean varieties spread in Rwanda. Two processes determine the
speed of diffusion: the creation of new users through seed distribution and the
disappearance of a variety from individual farms (mortality). Small bean plots, modest
seed quantities received, environmental stresses and poverty put farmers at risk of losing
varieties, even ones they may value. Overall, distribution tends to be both numerically
limited and socially restricted. Analysis shows the probability of survival to be
correlated with the rate at which farmers distribute seed. The paper presents a
demographic model for measuring varietal expansion which takes account of loss as well as
gain. Farmer-to-farmer distribution is differentially effective in diffusing varieties;
salient factors include the growers' appreciation of the variety, its productivity and
harshness of environment. Finally, we outline a diffusion strategy for improving small
farmers' access to new varieties, recognizing that adoption is not a one-time affair and
that the poorer have particular difficulty in receiving and keeping new cultivars.
010
Sperling, Louise; Munyaneza, S. 1995. Intensifiying production among smallholder
farmers : the impact of improved climbing beans in Rwanda. African Crop Science
Journal (Uganda) v. 3(1) p. 117-125 En.
While bush beans (Phaseolus vulgaris L.) have long been the
protein staple of Rwandan agriculture, improved climbing beans have been introduced within
the last 10 years, enabling farmers to intensify, stabilize and better stagger production.
Through a 1992-3 nation-wide survey of 1050 households, conducted in both major growing
seasons, this study examines the adoption of improved climbing beans across regions and
potential user groups. Use of improved climbing beans, by 500,000 households, crosscuts
farm size, economic dass and gender boundaries, and is most intensive among the more
disadvantaged. Initial concerns with staking material, how to obtain and manage it, have
posed relatively few problems for farmers, and the surprising plasticity of improved
climbers has encouraged research to more closely determine soil fertility demands.
Increased incidence of root rot (Fusarium oxysporum) and fear of reduced genetic
variability on-farm have resulted in the Institut des Sciences Agronomique du Rwanda
(ISAR's) adopting targeted pathogen screening procedures and releasing many new cultivars
simultaneously. The success of improved climbers, bringing Rwanda an additional US$ 8 to
15 million per year, has stimulated promising R & D efforts in Kivu, Zaire and
southern Burundi, and several other Eastern African regions have been identified as prime
for climbing bean introduction.
011
010 Sperling, Louise; Randrianmapita, G.; Rutagengwa, E.; Ntambovura, B.; Mubera, L.;
Uwimana, L. 1992. Etude de l'adoption et l'impact devarieté ameliorées en milieu
rural. Op. cit. In press.
012
Sperling, Louise; Scheidegger, Urs C.; Buruchara, Robin A.; Nyabyenda, Pierre; Munyanesa,
S. 1994. Intensifying production among smallholder farmers : the impact of
improved climbing beans in Rwanda. Centro Internacional de Agricultura Tropical,
Network on Bean Research in Africa. Butare (Rwanda). Occasional publications series ; no.
12. 13 p. En. (SB 327 .S63)
While bush beans (Phaseolus vulgaris L.) have long been the
protein staple of Rwandan agriculture, improved climbing beans have been introduced within
the last 10 years, enabling farmers to intensify, stabilize and better stagger production.
Through a nation-wide survey of c. 1050 households, conducted during both principal
growing seasons, this study examines their adoption across regions and potential user
groups. Use of improved climbing beans, by 500,000 households, cross-cuts farm size,
economic class and gender boundaries, and is most intensive among the more disadvantaged.
Initial concerns with staking material, how to obtain and manage it, have posed relatively
few problems for farmers, and the surprising plasticity of improved climbers has
encouraged research to more closely determine soil fertility demands. A sharp rise in root
rots (Fusarium oxysporum) and fear of reduced genetic variability on-farm have resulted in
the Institut des Sciences Agronomique du Rwanda (ISAR's) adopting targeted pathogen
screening procedures and releasing many new cultivars simultaneously. The success of
improved climbers, bringing Rwanda an additional US$ 8 to 15 million per year, has
stimulated promising R and D efforts in Kivu, Zaire and southern Burundi, and several
other areas of Eastern African have been identified as prime for climbing bean
introduction.
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