Growth and yield response of selected cowpea genotypes to alecfra vogelii (bcnth) infestation in Dodoma, Tanzania.
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Date
2011
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Sokoine University of Agriculture
Abstract
The effects of Alecira vogelii was assessed by introducing cowpea genotypes that
are resistant and/or tolerant under field conditions of Chamwino District in Dodoma.
Specifically, the research aimed at assessing the effects of A. vogelii on shoot and
root growth characteristics of cowpea and determining its effects on cowpea yield.
Randomized complete block design (RCBD) with three replications was used. The
experiment was set up at ARI-Hombolo and cowpea shoot biomass, root biomass.
plant height and yield component data obtained were subjected to analysis of
variance (ANOVA) using MSTAT-C computer statistical package. Tukey's honestly
significant different test was used to compare treatment means. At 9 Week After
Sowing Tumaini variety, genotypes IT 99K 205-8 and IT 99K 628 had significantly
(P<0.05) low shoots biomass in gram/plant 15.6 g. 12.4 g and 14.2 g. respectively
compared to IT 99K 494-6, IT 99K 7-21-2-2 and IT 97K 568-18 which had 18.9 g.
18.4 g and 17.1 g, respectively. Cowpea plant height of the local landrace (34.1 cm).
IT 99K 628 (33.3 cm) and IT 99K 530-1 (38.5 cm) differed significantly (P<0.05)
with the resistant genotypes IT 99K. 494-6 (47.6 cm). IT 99k 7-21-2-2 (54.1 cm) and
IT 97K 568-18 (63.2 cm) at 9 WAS. The local landrace (664.3 kg/ha). IT 99K 628
(944.0 kg/ha) and IT 99K 573-1-1 (1128.0 kg/ha) had significantly (P<0.05) low
yield compared to the resistant genotypes IT 99K 494-6 (2141.0 kg/ha), IT 99K 7-
21-2-2 (1536.0 kg/ha) and IT 97K 568-18 (2302.0 kg/ha). The seed weight per plant
of the local landrace (10.0 g) and IT 99K 628 (16.1 g) differed significantly
(P<0.05) from IT 99K 7-21-2-2 (23.4 g) and IT 97K 568-18 (23.2 g). Finally the
findings revealed that, genotypes IT 99K 494-6, IT 99k 7-21-2-2 and IT 97K. 568-18
are resistant and all others are susceptible to A.vogelii strain of Dodoma.
Description
Dissertation
Keywords
Cowpea genotypes, Alecfra vogelii (bcnth), Randomized complete, Block design