Tilahun And Kifle


Tilahun and Kifle

Greener Journal of Agricultural Sciences Vol. 5 (3), pp. 076-083, June 2015.

 ISSN: 2276-7770  

Research Paper

Manuscript Number: 030150939



of Critical Period of Weed-Common Bean (Phaseolus
L.) Competition at Kaffa, Southwest Ethiopia


Mola and 2*Kifle Belachew


1 South Agricultural Research Institute,
Bonga Agricultural Research Center, P.O. box 101, Bonga Kaffa, Ethiopia,

E-mail: Ot023@ yahoo. com

2 Ethiopian Institute of Agricultural
Research, Jimma Agricultural Research Center, P.O.Box 192, Jimma, Ethiopia,

E-mail: kiflekef@ gmail. com


Field experiment was conducted to
determine the critical period of weed control in common bean (Phaseolus vulgaris L.) at Bonga
Agricultural Research Center, Kaffa zone, Southwestern Ethiopia in 2013/14
cropping season. Two common bean varieties; ‘AFR-702’ and ‘Awassa-dume’ were
used with two sets of treatments using a randomized complete block design with
three replications. In the first set of treatment; the crop was kept weed free
until 10, 20, 30, 40, 50 and 60 days after crop emergence (DAE). In the second
set; weeds were permitted to grow with in the crop until 10, 20, 30, 40, 50 and
60 DAE. Weedy, weed free, farmers practice and recommended practice were also
included in the treatments as control and standard checks.

The weed
interference durations affected significantly yield and yield components of
both tested common bean varieties. The minimum value of bean yield was observed
under the full season weed infestation condition (7.86 q/h) and (6.29 q/h) for
AFR-702 and Awassa-dume verities respectively. The maximum value of bean yield
was recorded from weed free control (29.84 q/ha) and (27.2 q/h) for AFR-702 and
Awasa-dume varieties respectively. This research result indicated that dry bean
yield, 100 seed weights, pod per plant and plant height declined steadily as
the duration of weed competition increased. Weed infested conditions for the
entire growing season led to common bean yield loss of 73.65% and 76.88% for
variety AFR-702 and Awassa-dume compared to full-season weed-free treatments

From this
experiment, it is possible to conclude that the critical period of weed
competition period for common bean varieties Awassa Dume and AFR-702 lasted
when competition exceeds 30 DACE. There for controlling weeds from 10-30 days
after crop emergence highly reduce crop weed competition and gives higher bean
yield in Kaffa zone of Southwest Ethiopia and similar agroecologies.


competition, common bean, critical period, weeds, yield, yield loss.

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