Domestication of Ricinodendron heudelotti (Baill.) Pierre Ex. Pax. in the humid lowlands of Cameroon

2004 ◽  
Vol 39 (1) ◽  
Author(s):  
PM Mapongmetsem ◽  
B Duguma ◽  
BA Nkongmeneck
Keyword(s):  
Humid Lowlands

Uses, management and economic potential of Irvingia gabonensis in the humid lowlands of Cameroon

1999 ◽  
Vol 113 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Elias T Ayuk ◽  
Bahiru Duguma ◽  
Steve Franzel ◽  
Joseph Kengue ◽  
Matthias Mollet ◽  
...  
Keyword(s):  
Economic Potential ◽  
Irvingia Gabonensis ◽  
Humid Lowlands

Distribution, host range, and climatic constraints on Centistes gasseni (Hymenoptera: Braconidae), a South American parasitoid of cucumber beetles, Diabrotica spp. (Coleoptera: Chrysomelidae)

2003 ◽  
Vol 93 (6) ◽  
pp. 561-567 ◽  
Author(s):  
G. Cabrera Walsh ◽  
M.M. Athanas ◽  
L.A.B. Salles ◽  
R.F.W. Schroder
Keyword(s):  
South America ◽  
Host Range ◽  
South American ◽  
Pest Species ◽  
Percent Parasitism ◽  
Important Pest ◽  
Diabrotica Speciosa ◽  
Climatic Range ◽  
Northeastern Argentina ◽  
Humid Lowlands

AbstractThe genus Diabrotica includes a large number of pest species, including some of the most important crop pests of the Americas. The parasitoid Centistes gasseni Shaw is the first braconid to be described parasitizing Diabrotica in South America, and high natural infestations are reported. Field and experimental observations on the host range, distribution and biology of this parasitoid are described. Centistes gasseni was collected in southern Brazil, eastern Paraguay and northeastern Argentina, in a region comprising humid lowlands and highlands, and cool temperate to warm subtropical climates, with regular rainfall in excess of 1300 mm. Three Diabrotica species, D. limitata (Sahlberg), D. speciosa (Germar) and D. viridula (Fabricius) were found to host the parasitoid, with mean percent parasitism of 5.4, 2.0 and 1.0%, respectively. Diabrotica speciosa and D. viridula are the two most important pest Diabrotica species in South America. Laboratory experiments with field-collected beetles and parasitoid cocoons indicated that C. gasseni overwinters in adult host beetles, remaining dormant in its live host below developmental temperatures. A potential distribution of C. gasseni in North America is proposed based on its known climatic range and the distribution of the main pest species of adult overwintering North American Diabrotica.

scholarly journals Nitrogen use efficiency of taro and sweet potato in the humid lowlands of Papua New Guinea

2000 ◽  
Vol 79 (2-3) ◽  
pp. 271-280 ◽  
Author(s):  
Alfred E. Hartemink ◽  
M. Johnston ◽  
J.N. O’Sullivan ◽  
S. Poloma
Keyword(s):  
Papua New Guinea ◽  
Sweet Potato ◽  
Nitrogen Use Efficiency ◽  
New Guinea ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Humid Lowlands

scholarly journals Yield decline of sweet potato in the humid lowlands of Papua New Guinea

2000 ◽  
Vol 79 (2-3) ◽  
pp. 259-269 ◽  
Author(s):  
Alfred E Hartemink ◽  
S Poloma ◽  
M Maino ◽  
K.S Powell ◽  
J Egenae ◽  
...  
Keyword(s):  
Papua New Guinea ◽  
Sweet Potato ◽  
New Guinea ◽  
Yield Decline ◽  
Humid Lowlands
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