1
Virus diseases of cacao in West Africa. V. Alternative host plants
Ann. appl. Biol., 1950
 AND THEIR RELATION TO CACAO IN GHANA_files/text-right-6cc0af1009c53499f0888667532e4bd7.png)
 AND THEIR RELATION TO CACAO IN GHANA_files/appstore-e45c15a53a9af75ddfbe248f69ab2ef7.png)
 AND THEIR RELATION TO CACAO IN GHANA_files/google-play-37523ba2d7758659554cc8938b11584f.png)
×
 AND THEIR RELATION TO CACAO IN GHANA_files/left.jpg)
 AND THEIR RELATION TO CACAO IN GHANA_files/center.jpg)
 AND THEIR RELATION TO CACAO IN GHANA_files/right.jpg)
 AND THEIR RELATION TO CACAO IN GHANA_files/bg1.svg)
20 zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCB
, zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
A.
AND
TINSLEY, T.
w. zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
(1958). zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
Ann.
appz. zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
Biol.
46
(I),
20-22.
VIRUS DISEASES
OF
ADANSONIA DIGITATA
L.
(BOMBACACEAE) AND THEIR RELATION TO
CACAO IN GHANA
BY
A. ATTAFUAH
AND
"
West
African
Cocoa Research Institute,
Tafo,
Ghana
(With Plate
3)
Virus-infected
Adansonia digitata
L.
u-ere found in the Guinea-savannah
wood-
land forming the Northern Territories and on the Accra plains of Ghana, but those
tested in the rain forest were not infected. Three viruses isolated from infected
trees resembled the Kpeve cacao virus, but no definite relationship could be
established. It
is
unlikely that the original outbreaks of swollen shoot in cacao
came from
.4.
digitata.
The baobab tree,
,-ldansonia
digitata
L.,
occurs throughout the Savannah areas of
Africa and is widely known as a source of food and medicine. In Ghana, it is locally
common on the Accra plains and in the Guinea-savannah woodland of the Northern
Territories.
It
is also found in the rain-forests but only as cultivated trees, in or
near villages.
Posnette, Robertson zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
&
Todd zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
(1950)
reported that the baobab was susceptible
to
at least three of the cacao viruses found in West Africa, and Tinsley
&
Wharton
(1958)
infected it with a wide range of cacao virus isolates, and they suggested it
might be
a
natural host for these viruses.
To
test the suggestion, baobab trees
growing in the savannah region were examined in a survey later extended, with the
co-operation of the Ghana Department of Agriculture,
to
trees growing near
villages in the forest areas,
MATERIALS
AND
METHODS
The
trunk
of
A.
digitata
is seldom more than
20
ft. high,
so
the leaves are compara-
tively easily reached with the aid
of
a sectional ladder. Small twigs bearing young
'flush' leaves were wrapped in damp blotting paper and packed in tins. As the
leaves dry out quickly under the conditions in the savannah, the collections were
brought to the laboratory within a day when possible. Where long distances
prevented this, the cuttings were planted in soil under damp muslin in a modified
Wardian case. This method was very satisfactory and material remained fresh over
many days.
Ideaves and cuttings were colonized for
24
hr. with nymphs of the mealybug
Pseudococcus
njalensi;
Laing, when the insects, thirty for each bean, were transferred
*
On
secondment from Rothamsted Experimental Station, Harpenden, Hertfordshire.
 AND THEIR RELATION TO CACAO IN GHANA_files/2.jpg)
 AND THEIR RELATION TO CACAO IN GHANA_files/3.jpg)
 AND THEIR RELATION TO CACAO IN GHANA_files/4.jpg)
Close
×
 AND THEIR RELATION TO CACAO IN GHANA_files/translate-32.png){kind=spacer}
Thank you for your feedback!
Is there anything we can do to improve the Enhanced PDF?