With the need of a large-scale seedling production, the application of purple nutsedge extract may represent a promising alternative, contributing to the fruit species propagation. The aim of this study was to evaluate the effects of nutsedge extract on the survival rate, rooting and biomass of acerola’s mini-cuttings. The experimental design was a completely randomized block, with a 5x2 factorial arrangement (five aqueous purple nutsedge extracts of nutsedge (0%, 25%, 50%, 75% and 100%) and two types of mini-cuttings, a pair of entire leaves and a pair of half leaves) resulting in 10 treatments with 5 repetitions and 8 mini-cuttings per repetition. The evaluations were performed at 75 days after planting, when destructive analysis were carried out for morphological characteristics. The evaluates variables were mini-cuttings survival percentage, percentage of mini-cuttings with sprouts, percentage of mini-cuttings with callus, percentage of minicuttings with roots, root system length, shoot dry mass, root dry mass, total dry biomass and the ratio between shoot and root dry mass. For the experiment conditions, the nutsedge extract positively influenced the survival percentage and percentage of sprouting of acerola’s mini-cuttings, however the extract application did not influence the mini-cuttings biomass of, being the results observed with or without the cut on mini-cuttings leaves.
RESUMOMastite é a inflamação da glândula mamária da vaca, sendo infecto-contagiosa que mais se propaga nos rebanhos e geralmente causando grandes prejuízos a indústria de laticínios, pode ser provocada por cerca de 130 agentes envolvidos, dentre eles, bactérias, vírus, algas e fungos. As bactérias são os agentes de maior importância como causa da doença. Por esta razão o IFRN aprovou o projeto para avaliação de qual o melhor tratamento com plantas medicinais nativas a ser utilizada na cura da mastite. O enfoque do resultado do projeto estaria direcionado para o diagnóstico e cura da doença na criação de rebanhos leiteiros de pequenos produtores do Vale do Assu. Para a realização desse diagnóstico e investigação sobre planta medicinal a ser utilizado nas vacas acometidas pela mastite, serão realizados exames de antibiograma para investigar a susceptibilidade da bactéria a determinadas plantas. Nos resultados preliminares, realizados em laboratório, foi identificado que a casca do caule do cajueiro roxo (Anacardium occidentale L) tem ação antibiótica e a flor da catingueira (Caesalpinia pyramidalis) inibe a proliferação das bactérias existentes no leite de vacas infectadas com mastite sub-clínica. Desta maneira, sugere-se a possibilidade do uso deste vegetal no combate e cura a esta doença. PALAVRAS-CHAVE:Mastite, Antibiograma, Plantas medicinais.
II Occurrence of Lysiphlebus testaceipes parasitizing
Knowledge of diversity of natural enemies in agroecosystems is vital for the integrated pest management. However, surveys of beneficial insects (predators and parasitoids) in the melon crop (Cucumis melo L.) in the semiarid region in Brazil are scarce. Thus, the objective of this study was to know the families of predator insects associated with melon crop in a semiarid region in the state of Rio Grande do Norte (RN), one of the main melon producers in Brazil. The survey study was carried out in a commercial melon area, in the municipality of Baraúna (RN). The samples were collected weekly during the cycle of melon, using passive (Pitfall and Moericke traps) and active (sweep net) collection methods. A total of 13 families of predator insects were collected. The families with the highest relative abundances in the passive collection method were Labiduridae (89.53%) and Formicidae (6.91%), while in the active collection method were Chrysopidae (59.81%) and Staphylinidae (20.56%). These families contain important species of predator which can promote crop pest suppression in melon agricultural systems.
<p>O objetivo do trabalho foi avaliar a diversidade de insetos em área de policultivo e monocultivo agroecológico de frutíferas no município de Ipanguaçu, Rio Grande do Norte. O levantamento foi realizado na fazenda escola do Instituto Federal do Rio Grande do Norte (IFRN), <em>Campus</em> Ipanguaçu, no período de junho à agosto de 2012, em duas áreas distintas (0,8 ha cada): Área 1 (5°32'14.86"S e 36°52'19.81"W) - Pomar agroecológico (policultivo com goiaba, acerola, graviola, limão, manga e banana) e Área 2 (5°32'1.55"S 36°53'2.21"W) - monocultivo agroecológico de banana. Foram identificadas ao final do levantamento nove ordens na área de policultivo agroecológico de frutíferas: Hymenoptera, Diptera, Coleoptera, Orthoptera, Blattodea, Hemiptera, Lepidoptera, Odonata e Dermaptera e quatro na área com monocultivo agroecológico de banana: Hymenoptera, Diptera, Coleoptera e Orthoptera. O resultado obtido no presente trabalho indica que, mesmo sob o mesmo sistema de manejo, em áreas cultivadas com mais de uma espécie frutífera ocorre à presença de uma maior diversidade de insetos. </p><p align="center"><strong><em>Primary inventory of entomofauna in polyculture and monoculture fruit trees areas in municipality of Ipanguaçu, RN</em></strong></p><p><strong>Abstract:</strong> This study aimed to evaluate the insect diversity in polyculture and monoculture agroecological of fruit trees in municipality of Ipanguaçu, Rio Grande do Norte. The survey was carried out at the experimental farm of the Federal Institute of Rio Grande do Norte, <em>Campus</em> Ipanguaçu, in period from June to August 2012, in two distinct areas (0.8 ha each): Area 1 (5°32'14.86"S e 36°52'19.81"W) - Agroecological orchard (polyculture with guava, acerola, graviola, lemon, mango and banana) and 2 (5°32'1.55"S 36°53'2.21"W) – Banana’s agroecological monoculture. At the end of the survey, nine orders were identified in area of fruit trees’s agroecological polyculture: Hymenoptera, Diptera, Coleoptera, Orthoptera, Blattodea, Hemiptera, Lepidoptera, Odonata e Dermaptera e quatro na área com monocultivo agroecológico de banana: Hymenoptera, Diptera, Coleoptera e Orthoptera. The results obtained in the present study indicate that even under the same management system, in areas cultivated with more than one fruit species, the presence of a greater diversity of insects occurs.</p><p><strong> </strong></p>
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