Biological activities of plant extracts from tropical Africa

Since 1983, investigations of plants have been conducted in the tropical rainforest of Cameroon to search for new naturally bioactive substances. A total of 62 plant species was obtained from Cameroon, Zaire, and Tanzania. The extracts were tested for insecticidal, herbicidal, and fungicidal activities. Insecticidal activity was found in 23 extracts. Of the 51 extracts from Cameroon and Tanzania, herbicidal activity was detected in seven, and fungicidal activity in seven. ‘Polyascias fulva’, ‘Crassocephalum manii’, ‘Vernonia amygdalina’, ‘Vernonia vogetti’, ‘Poga oleosa’, ‘Gnidia glauca’, ‘Trema guinensis’ and ‘Combretum bracteatum’ were evaluated to be highly promising candidates for further investigation of their active constituents on the basis of their potency and/or broad spectrum of biological activities. Bibliogr., sum.

Title: Biological activities of plant extracts from tropical Africa
Authors: Ohigashi, Hajime
Takagaki, Teruyoshi
Koshimizu, Koichi
Year: 1991
Periodical: African Study Monographs
Volume: 12
Issue: 4
Pages: 201-210
Language: English
Geographic terms: Cameroon
Congo (Democratic Republic of)
Tanzania
External link: http://jambo.africa.kyoto-u.ac.jp/kiroku/asm_normal/abstracts/pdf/ASM%20%20Vol.12%20No.4%201991/Ohigashi.pdf
Abstract: Since 1983, investigations of plants have been conducted in the tropical rainforest of Cameroon to search for new naturally bioactive substances. A total of 62 plant species was obtained from Cameroon, Zaire, and Tanzania. The extracts were tested for insecticidal, herbicidal, and fungicidal activities. Insecticidal activity was found in 23 extracts. Of the 51 extracts from Cameroon and Tanzania, herbicidal activity was detected in seven, and fungicidal activity in seven. ‘Polyascias fulva’, ‘Crassocephalum manii’, ‘Vernonia amygdalina’, ‘Vernonia vogetti’, ‘Poga oleosa’, ‘Gnidia glauca’, ‘Trema guinensis’ and ‘Combretum bracteatum’ were evaluated to be highly promising candidates for further investigation of their active constituents on the basis of their potency and/or broad spectrum of biological activities. Bibliogr., sum.