Natural hybridization has often been recorded within certain genera of orchids, one them is Catasetum. During a field study in forest de igapó Brazilian Amazon, new natural hybrid was found, it here described as Catasetum × sheyllae. Its morphological features, mainly the structures lip, are intermediate between those its putative parent species, C. boyi and garnettianum, both observed sympatry.

In this report, we propose, describe and illustrate a new Catasetum nothospecies from north of Manaus in the state Amazonas, Brazil. Several factors indicate that natural hybrid is undoubtedly result crossing C. longifolium roseoalbum, including fact its morphological traits are intermediate between those these species it occurs only few metres away them. Therefore, morphologically compared to species. Information relating habitat, ecology geographical distribution also given, as well key...

ABSTRACT The pantropical Vanilla is the most species-rich genus among Vanilloideae (Orchidaceae). With 38 species, Brazil center of diversity for Vanilla. Several Brazilian taxa are considered obscure, as species boundaries often unclear when studies performed exclusively on dried specimens. This case sprucei Rolfe, a rare taxon with ephemeral flowers that has been referred to based specimen collected in Colombian Amazonia. We present data confirming its occurrence Brazil, together taxonomic...

The widespread use of synthetic insecticides to control diseases such as those transmitted by the vector Aedes aegypti (Linnaeus, 1762) has caused resistance mosquitoes and adverse effects on non-target organisms, humans animals. In this sense, nanotechnology emerges a strategy for developing new promising insecticidal agents against vector. Therefore, research developed nanoemulsion containing A. suaveolens essential oil, well evaluate larvicidal activity toxicity in mammals. oil was...

Ayapana triplinervis is a plant species used in traditional medicine and mystical-religious rituals by communities the Amazon. The aim of this study are to develop nano-emulsion containing essential oil from A. morphotypes, evaluate larvicidal activity against Aedes aegypti acute oral toxicity Swiss albino mice (Mus musculus). oils were extracted steam dragging, identified gas chromatography coupled mass spectrometry, nano-emulsions prepared using low energy method. Phytochemical analyses...

ABSTRACT This study presents a new orchid species of the genus Catasetum belonging to group with symmetrical and parallel antennae. It was found in terra-firme floodplain forests Brazilian states Amazonas Pará. We provide formal description species, images, notes on distribution, habitat, phenology, flower visitors preliminary conservation status. compare it C. cristatum barbatum, both sympatric morphologically most similar species. preliminarily classified Endangered (EN) category according...

A produção de açaí tem grande influência na economia do município Inhangapi – PA, a partir da obtenção dados secundários em fontes governamentais e pesquisa primária no município. tendência mercado é se ampliar, medida que o processamento acrescente ao seu processo, mais procedimentos atendam exigências termos higiene, apresentação qualidade produto. Esse estudo foi realizado Município Inhangapi, Região Integração Guamá, Nordeste capital estado Pará. Possui uma área 471,449 km². Sua...

Hybridization is a process that can occur randomly in nature between different genetically compatible species, as observed within the genus Catasetum. Thus, this work proposes description of new nothospecies found lake Castanho located municipality Careiro Castanho. It described, illustrated and compared with its parental species: C. gnomus saccatum. In addition, information regarding distribution, habitat phenology well key to natural hybrids occurring Brazilian state Amazonas are...

Nanoinsecticides of plant origin have advantages in the resistance Aedes aegypti, vectors infectious diseases. The objective this study was to evaluate insecticidal potential Ayapana triplinervis essential oil nano-emulsions using silico and vivo assays an aegypti model. Molecular docking showed that minority compounds present morphotype A a more significant binding affinity inhibit acetylcholinesterase juvenile hormone receptors. adults were susceptible A. at 150 µg.mL-1 diagnostic time 15...

O Cacau é uma espécie nativa da região amazônica, que se desenvolve sob clima tropical e tem a sua origem nas regiões de florestas tropicais américa do sul. estudo foi realizado em estufa Laboratório Sementes (LAS), fica localizada no Instituto Federal Pará (IFPA), Campus Castanhal – PA. Foi utilizado o delineamento experimental inteiramente casualizado (DIC), contando com 11 tratamentos 5 repetições, totalizando 55 unidades experimentais. Os foram: Tratamento completo (Com todos os...

A cultura do cacau tem grande interesse comercial na produção e venda de amêndoas que são destinadas para a fabricação chocolate, além outros produtos. Portanto, torna-se necessário realização estudo avaliar nutrição mineral mudas cacaueiro. Com isso o objetivo trabalho foi analisar desenvolvimento cacaueiro, sob omissão macro micronutrientes, caracterizando os sintomas visuais observados nas folhas das plantas. Foi utilizado delineamento experimental inteiramente casualizado (DIC), contando...

Objective: In this work, we evaluated the chemical composition by chromatography coupled to mass spectrometry, antimicrobial and insecticidal activity of essential oils (TrEO) nanoeffu-sion (NTrEO) oil from Tetradenia riparia leaves. We also acute toxicity in Mus musculus. The results showed that S. aureus greater susceptibility TrEO, with a minimum inhibitory concentration (MIC) 125 µg.mL-1, when compared P. aeruginosa, E. coli, which presented MIC 250 µg.mL-1. There was toxic effect on...

A agricultura sustentável é cada vez mais reconhecida como uma abordagem fundamental para resolver problemas alimentares e ambientais globais. Neste contexto, os sistemas Integrados Lavoura, Pecuária Floresta (ILPF) aparecem alternativa promissora ao integrar vários componentes agrícolas em única área de produção. O objetivo deste trabalho investigar a interação entre ILPF, matéria orgânica fertilidade do solo analisar o impacto sistema na qualidade produtividade agrícola. consiste...

A cultura do açaizeiro é de extrema importância para a Região Norte Brasil, logo, o objetivou-se com esse trabalho avaliar estado nutricional da em pela amostragem folhas. O experimento realizado campo, uma área 20.000 m², pertencente ao Engenheiro Agrônomo João Tomé Farias Neto, no município Igarapé-Açu, Pará situado nas seguintes coordenadas geográficas: Latitude: 1° 7' 40'' Sul, Longitude: 47° 36' 56'' Oeste. De acordo os resultados obtidos, as faixas suficiência teores nutrientes...

The genus Catasetum stands out by its elevated number of registered natural hybrids. Many them have been described as new species and there is a need revision. Thus, we propose in this study change the taxonomic status joaquinianum: suggest it hybrid, based on comparison holotype protologue with various plants resulting from artificial hybridization C. fimbriatum hookeri. We provide brief description, well data related to analysis original material, geographic distribution phenology order...

This study describes a new natural hybrid of Catasetum, C. × vilhenense, from the State Rondônia (Brazil) found in ombrophilous forests near Roosevelt River. The shows intermediate morphological features between its parental species, ariquemense and multifidum, with specific differences floral morphology inflorescence structure. We provide detailed data on habitat, ecology, geographic distribution, photographic plate hybrid. Given restricted range, limited to single locality an area...

In the present study we propose a new Catasetum taxon belonging to group of species with symmetrical and converging antennae. It was found in vegetation "terra firme" "campinarana" central Brazilian Amazon. A detailed description is given as well photograph plate comments relating distribution, habitat, phenology conservation status. compared C. rivularium barbatum which are sympatric somewhat similar taxon. Furthermore, key convergent antennae occurring

In this study we propose to treat Catasetum meeae and C. lendarium as conspecific based on distinctive features identified in the protologues of both species. We emphasize that was never collected again after its description 1960s. Here also invalidate name because original is not accordance with Shenzhen Code. provide a brief taxonomic discussion for taxon, well photographs information related distribution ecology. At stage species evaluated belonging Endangered (EN) category according IUCN...

This work aimed to prepare a nanoemulsion containing the essential oil of Protium heptaphyllum resin and evaluate its biocidal activities against different stages development Aedes aegypti mosquito. Ovicide, pupicide, adulticide repellency assays were performed. The main constituents p-cymene (27.70%) α-pinene (22.31%). developed showed kinetic stability monomodal distribution at hydrophilic-lipophilic balance 14 with droplet size 115.56 ± 1.68 nn zeta potential -29.63 3.46 mV. insecticidal...

O trabalho objetivou estudar a fenologia de cinco especies arboreas, Dinizia excelsa Ducke, Manilkara paraensis (Huber) Standl. , Lecythis sect. poiteaui S.A. Mori Peltogyne paradoxa Ducke e Goupia glabra Hubl., atraves das fenofases floracao frutificacao associadas precipitacao pluviometrica. estudo foi desenvolvido em uma area floresta densa terra firme aproximadamente 1200 hectares, situada no municipio Mazagao, Estado do Amapa. monitoramento teve duracao 26 meses, compreendido entre...

A new Catasetum species from Brazilian Amazon, more specifically the “Floresta Nacional de Saracá-Taquera” (State of Pará), is proposed, described and illustrated. This taxon belongs to subgenus Catasetum, section Isoceras, subsection whose representatives have symmetrical parallel antennae. It compared with C. nhamundaense, garnettianum barbatum, all same antennae characteristics belonging "C. cristatum alliance". Among related species, tavaresii differs mainly in lip structure. We also...