TURNING OVER A NEW LEAF
For a More Sustainable Supply of Medicinal Tree Products

Case study of Madagascar

Philippe Rasoanaivo
Institut Malgache de Recherches Appliquées
Antananarivo, Madagascar

Trees threatened
by medicinal bark harvesting
Prunus africana
Cedrelopsis grevei
Effectively

Ravensara aromatica
Cinnamomum zeylanicum
Strychnos myrtoides
Erythroxylum pervillei

Potentially

Hernandia voyroni
Cryptocarya sp

Harvesting P. africana in Madagascar

Local community participation

(INDENA, Italy)

(Germany)

Processed

Raw

Graph showing the annual quantity of P. africana
exported for the period 1972-2000

200
150
100
50
0

19
72
19
74
19
76
19
78
19
80
19
82
19
84
19
86
19
88
19
90
19
92
19
94
19
96
19
98
20
00

Quantity (tons)

250

Year

Sustainable exploitation

In situ forest conservation
Ex situ forest boundary cultivation
Plantation

Cedrelopsis grevei

Exploitation of Cedrelopsis grevei

Leaves and stem barks are used
to extract essential oils
for local uses and export

Stem barks are used as an ingredient in phytomedicines
Estimated 10 tons harvested per year

Ravensara aromatica

Stem barks are used
to extract essential oils
For local uses and export

Estimated 50 tons harvested each year

Strychnos myrtoides
Stem bark contains alkaloids
that reverse chloroquine resistance

Possibility of important harvesting in the near future

Erythroxylum pervillei
Roots and stem bark contain alkaloids
that reverse MDR resistance

Possibility of important harvesting for clinical trials

Cinnamomum zeylanicum

Over-harvesting of stem barks

Hernandia voyroni
Stem barks are used
to extract essential oils

Trunk is extensively used
to make coffins, canoe
Alkaloids from stem barks
may be used as chemosensitiers
in malaria

Hazomanga
2 species: Cryptocaria sp (Lauraceae)

Stem barks: potentially used to extract essential oils

Produits Naturels Biologiques
(PRONABIO)

Trade Association

GC and GC/MS equipment

TLC scanner equipment

Thank you for your attention