Richard Adu-Acheampong

35 Pages·2013·2.4 MB·English

by  Paul Mundy

HOST PLANT RESISTANCE, CULTURAL
AND MECHANICAL CONTROL IN COCOA
R. Adu-Acheampong, A. R. Cudjoe, Y. Adu-Ampomah, K. Gorkeh-Sekyim
1
www.crig.org
World cocoa production
2
Cocoa is an important cash crop in West
Africa

W. Africa produces 70% of the world cocoa
Major biotic and abiotic stresses to
cocoa production
Black pod disease
(cid:131) Mirids and associated
(cid:131)
Witches’ broom fungi
(cid:131)
Frosty pod Cocoa pod borer
(cid:131) (cid:131)
Swollen shoot virus Planting materials
(cid:131) (cid:131)
disease
Soil fertility
(cid:131)
Vascular streak
(cid:131)
disease
Mistletoes
(cid:131)
4
Emerging disease and pest problems
in West Africa
Pink disease
(cid:132)
White threads
(cid:132)
Stink bugs
(cid:132)
Stem borers
(cid:132)
Termites
(cid:132)
Pod feeders
(cid:132)
5
Black pod disease problem of Cocoa
Black pod caused by
(cid:132)
several species of
Phytophthora is one of the
most-important diseases
affecting cacao
In Central and West Africa.
(cid:132)
P. megakarya is the
species that causes most
damage (up to 80% of pod
losses).
6
Witches’ broom (left) caused by Crinipellis

perniciosa Photo: USDA, SPCL

7
Frosty Pod caused by Moniliophthora roreri
Photo: USDA, SPCL
8
Cocoa swollen shoot virus disease
problem
More than 230 million
(cid:132)
infected cocoa trees have
been destroyed due to
CSSVD (Dr Henry
Obiatey, pers. comm.)
9
THE COCOA MIRID
PROBLEM
Adult of S. singularis
Fungi
Fungi