pest control for the storage of cowpea by small scale farmers in ssa towards participation in...
TRANSCRIPT
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Pest control for the storage of cowpea by small scale farmers in SSA
towards participation in action-research
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The project
• Organisations – DfID– NRI, MOFA, SARI,
NGOs, Farmers unions…
• Duration• Research to
Action-research & Participatory research
• Cowpea (Black-eye bean)– Traditional - widespread– Beans, leaves, fodder– Adapted – drought, poor soil
• Storage on farm• Pest damage• Adapted solution
– Effective– Safe– Affordable– Acceptable
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Location
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SSA
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Ghana
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Northern region
Rainy season: July - September
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Dry season
Dry season: November - May
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Tamale market
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Cowpea with damage
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Cowpea and bruchid
Callosobruchus maculatus
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Surveys
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• Damage on stored cowpea• Farmers coping strategy• Control methods
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On-farm surveys
• Northern Ghana• Farmers’ stores
• Surveys– monthly
assessments– dry season– % damage– 2 years
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0
25
50
75
100
Dec Jan Feb Mar Apr May Jun Jul Aug Sep
% d
ama
geSurveys
0
10
20
30
40
Nu
mb
er
of fa
rmer
s af
fect
ed
Damage on stored cowpea in the Northern Region during the storage season 96-97
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0
25
50
75
100
Jan Feb Mar Apr May Jun Jul
Surveys Damage on stored cowpea in the Northern Region
during the storage season 97-98: 131 farmers
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0
25
50
75
100
Jan Feb Mar Apr May Jun Jul Aug
Surveys Farmers stop storage – variation of damage
(131 farmers)
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On-farm trials
0
10
20
30
40
50
60
70
80
90
100
Dec Jan Feb Mar Apr May Jun
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Surveys: control methodsused on cowpea
TreatmentRegio
nMean % damage
Number of
farmers
Cypermethrin / sun dried
NR 66.2 1
Phosphine / Cypermethrin
NR 60.1 1
Cypermethrin NR 45.3 8
Sumicombi (Fenitrothion + Fenvalerate)
NR 44.5 4
sun dried NR 40.5 1
not treated NR 36.2 9
Cypermethrin / Sumicombi
NR 36.0 2
Napthalene NR 23.4 2
Phosphine NR 17.4 5
Mix with ash, no heat: heated over fire later
UER 7.8 1
Mix with ash UER 7.4 2
Heat over fire and mix ash
UER 6.2 31
Heat over fire and mix ash and orange peel
UER 3.5 1
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Type of treatment Treatment RegionMean % damage
Number of farmers
Not treated - NR 6.0 12
- UER 4.5 1
Actellic 2% dust NR 16.7 1
(Pirimiphos methyl) 25% emulsifiable concentrate NR 9.1 1
Dry materials Mixed with wood ash UER 3.4 2
mixed Mixed with ash and kul-enka UER 2.1 1
Kimkim mixed with seed UER 0.9 2
Water based Immerse in warm water UER 5.7 1
ash Immerse in ash in warm water UER 1.4 1
Steamed ash in water, pored over bambara, dried
UER 1.3 3
Immerse in warm water, dry, mix in ash UER 0.6 3
dawadawa Dawadawa seed boiled in water, poured over grain
UER 10.7 3
Dawadawa seed boiled in water, poured over grain, coat with ash
UER 0.1 1
Dawadawa seed and kimkim boiled in water, poured over grain
UER 3.2 1
kimkim Dipped in boiled kimkim water NR 2.5 12
Immerse in kimkim boiled water UER 6.4 5
Immerse in kimkim and neem leaves boiled water
UER 26.5 1
Immerse in kimkim boiled water, dry, mix with ash
UER 1.2 2
Immerse in kimkim boiled water, dry, UER 0.6 5
shea butter Soak in shea butter waste water NR 2.0 6
Immerse in water in which shea butter dissolved
UER 1.6 2
neem & orange peel Added orange peel to water with neem UER 0.0 1
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On-station trials
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Test of control methods
• From surveys:– Ash– Chilli– Shea nut butter– Shea nut residue– Plant extracts
• From literature:– Hermetic storage– Solarisation
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Solarisation
0
11:16 11:46 12:16 12:46 13:16 13:46 14:16 14:46
Time of day
57.3
Th
resh
old
(d
eg
ree
s C
)
0
10
20
30
40
50
60
70
80
90
Te
mp
era
ture
(d
eg
ree
s C
)
cowpea 1-2cm cowpea 5cmbambara 1-2cm bambara 5cmambient
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On-farm trials
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On-farm test of control methods
• Selected from on-station results
• Set-up after harvest
• Monthly assessment of damage during dry season
• Control: no treatment– 20 farmers– 20 kg– bag
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1999 trial
0 %
10 %
20 %
30 %
40 %
50 %H
erm
etic
So
laris
atio
n
So
laris
atio
n+
Sh
ea
nu
t
Sh
ea
nu
t
Kim
-kim
Co
ntr
ol
Ash
Ch
illi
Pa
lag
a
Pe
rce
nta
ge
da
ma
ge
Average damage increase after 2 months of storage (with SEM)
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2000 trial
0 %
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
Dec Jan Feb Mar Apr May Jun
Per
cent
age
dam
age
Control
Hermetic
Paddy ash
Palaga
Shea butter
Solarisation
Solar. in pots
Solar. Monthly
Solar. Paddy ash
Solar. Shea butter
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Farmers trials
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Would farmers use or recommend the treatment?
-20
-10
0
10
20
30
Control Solar. + ash
Solar. Monthly
Solar. + shea
yes
no
Results
On-farm trials 2001. Average damage (with SEM) at the end of the storage period
0
20
40
60
80
100
Control Solar. + ash
Solar. monthly
Solar. + shea
Per
cen
tag
e d
am
ag
e April
May
June
Farmers' perceptions of the treatment used
-20
-10
0
10
20
30
Control Solar. + ash
Solar. Monthly
Solar.+ shea
v. good
good
OK
not good
Num
ber
of
resp
on
den
ts
Germination tests
7 87 10
0%
20%
40%
60%
80%
100%
Control Solar. + ash
Solar.Monthly
Solar. +shea
Per
cen
tag
e s
eed
s g
erm
inat
ing
(w
ith n
umb
er
of
farm
ers
test
ing)
0
0.5
1
1.5
2
2.5
3
Ran
k o
f ge
rmin
atio
n te
st
am
on
g c
rite
ria
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Extension
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Two locations
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Uganda
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Conclusions
• Viable solution?– Cost– Scaling up– Follow up
• Learning process– Collaborative work - decentralisation– From academic research to farmers
participatory research…
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