Results 11 to 20 of about 395 (107)

Long‐term ecological legacies in western Amazonia

open access: yesJournal of Ecology, Volume 109, Issue 1, Page 432-446, January 2021., 2021
We documented successional dynamics in a lowland Amazonian forest setting for hundreds of years following the cessation of pre‐Columbian disturbance. We found no evidence of persistent enrichment or depletion of intentionally altered taxa (i.e. direct legacy effects) but did find evidence of indirect legacy effects that have persisted to the modern day.
Christine M. Åkesson   +9 more
wiley   +1 more source

Ação inseticida do extrato de Derris amazonica Killip para Cerotoma arcuatus Olivier (Coleoptera: Chrysolelidade). [PDF]

open access: yes, 2019
A abundância e o potencial inseticida de Derris amazonica e a necessidade de controle de Cerotoma arcuatus Olivier (Coleoptera: Chrysomelidae) na cultura do feijão-caupi (Vigna unguiculata L.
ALECIO, M. R.   +8 more
core   +1 more source

The identity of Timbó-verdadeiro: Deguelia utilis (A.C.Sm.) A.M.G.Azevedo (Leguminosae -- Papilionoideae) [PDF]

open access: yes, 2015
The original description of Lonchocarpus utilis A.C.Sm. is augmented by the inflorescence and flower data, since the species was established under a sterile material.
TOZZI, ANA M. G. DE AZEVEDO
core   +1 more source

Standardization of the bio-active compounds (rotenoids) from the extract of local plant species (derris elliptica) using the internal standard method of high performance liquid chromatography (HPLC) [PDF]

open access: yes, 2005
It is well known now that some plant species represent an efficient factory of chemicals, which are manufactured and used as bio-weapons against pest attacks. Extensive work has been done during the last few decades on these potentially useful compounds.
M. R., Sarmidi   +2 more
core  

Tree diversity and canopy cover in cocoa systems in Ghana [PDF]

open access: yes, 2015
First Online: 15 October 2015Cocoa (Theobroma cacao L.) growing systems in Ghana and West Africa consist of diverse tree species and densities. This study was conducted to determine factors that influence tree species configurations and how tree ...
Anders, R., Asare, R.
core   +2 more sources

Multiple Anthropogenic and Climatic Factors Drive Tree Species Attributes in Ecologically Distinct Sacred Groves in Ghana

open access: yesInternational Journal of Forestry Research, Volume 2025, Issue 1, 2025.
Sacred groves are rich biodiversity hotspots serving as an important habitat for conserving species and providing ecosystem goods and services to meet societal needs. Despite the benefits these sacred groves offer, they are threatened by anthropogenic stressors coupled with climate change impacts, thereby limiting their maximum ability to offer ...
Augustine Kofi Gyedu   +7 more
wiley   +1 more source

A study into the effect of concentration process on the yield of rotenone from the extract of local plant species (Derris elliptica) [PDF]

open access: yes, 2004
Bio-pesticides are becoming increasingly important as pest management tools in various cropping systems in the tropics essentially to remedy problems associated with the indiscriminate use of ‘hard’ inorganic pesticide and interest in organic ...
Aziz, R. A.   +2 more
core  

El género Deguelia (Leguminosae, Papilionoideae, Millettieae) en Mesoamérica, una especie nueva y una combinación nueva [PDF]

open access: yes, 2009
Se presenta una revisión taxonómica del género Deguelia Aubl. (Millettieae: Leguminosae) para Mesoamérica; para ello fue necesario describir e ilustrar a una nueva especie, Deguelia alata M. Sousa y proponer una nueva combinación, D. densiflora (Benth.).
Mario Sousa S.
core   +2 more sources

Estudo comparativo da epiderme de três espécies de Deguelia Aubl. (Fabaceae). [PDF]

open access: yes, 2011
III ...
CARVALHO, L. C. N.   +4 more
core  

Aplicación de extractos vegetales para el control de cogollero (Spodoptera frugiperda) en cultivo de maíz (Zea mays) Imaza, Bagua – Amazonas 2020 [PDF]

open access: yes, 2022
La principal plaga del cultivo de maíz amarillo duro variedad marginal T28 en el distrito de Imaza es el cogollero (Spodoptera frugiperda), el desconocimiento de los productores en el manejo integrado de plagas (MIP) conllevan a insustentables ...
Barboza Calle, Magdalena Elena Etelvina
core  

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