The effects of different sucrose concentrations, light spectra, and plant growth regulators on in vitro tuberization yam (Dioscorea sp.) were determined. A completely randomized experimental design was used a factorial arrangement, with five replications. In the first experiment, three concentrations (30, 60, 90 g.L-1) four naphthalene acetic acid (NAA) (0.0, 1.0, 2.0, 4.0 mg.L-1) tested. highest percentage observed use g.L-1 sucrose, regardless NAA used. Greater diameter (7.88 mm) fresh...

A mineração é uma área tecnológica que ainda carece de estudos científicos e possui alto potencial avanços a serem conquistados, visto um setor da economia com bastante importância para o país. Há alguns anos, ocorrência maior oscilação nos preços nas commodities incluem os produtos minerais advindos dos processos estimula competitividade processos, através aplicações métodos possam apoiar as decisões gestores técnicos deste segmento econômico. Este trabalho traz como ferramental...

ABSTRACT Genetic resistance is one of the most suitable strategies to control cucurbit powdery mildew (CPM) on melon, incited by Podosphaera xanthii or Golovinomyces orontii. However, many races these pathogens have been reported worldwide in recent years, what may compromise effectiveness this method. Thus, annual surveys CPM and screening germplasm for new sources genetic provide a vital support melon breeding programs. This study aimed at identifying natural population race under...

ABSTRACT Melon is one of the most economically important crops cultivated in Brazil, especially Northeast region. However, as its cultivation increases, phytosanitary problems arise, including those caused by nematodes, which are effectively controlled using resistant cultivars. This study aimed at assessing reaction muskmelon genotypes, terms resistance to Meloidogyne incognita and M. javanica infestation. The experiment was conducted under greenhouse conditions a completely randomized...

The cultivation of melon (Cucumis melo L.) in greenhouses has contributed to the increased incidence fungal diseases, particularly gummy stem blight caused by Didymella bryoniae (Fuckel) Rehm. This disease is currently considered main affecting this crop, causing conditions such as water soaked seedlings, and fruit cankers, reducing productivity quality. Considering importance disease, aim study was evaluate reaction different C. genotypes D. bryoniae. Sixty-eight were investigated. Two...

ABSTRACT Watermelon farming has a high economic and social importance. In parallel, the consumers’ demand for distinctive products led to niche markets, where mini watermelons stand out. This study aimed assess agronomic performance fruit quality of watermelon grown in coconut husk fiber, as function number stems per plant density. The Smile hybrid was used, well randomized block design, 2 x factorial scheme, with eight repetitions, being first factor (1 or 2) second plants pot 2)....

Shading screens have been extensively used in leafy-vegetables production system. Nevertheless, there is still a substantial lack of knowledge regarding the effects this technology on performance non-conventional vegetables such as jambu, typical staple food with social and economic importance for Amazon region. This study thus aimed to evaluate shading agronomic two jambu varieties. The experiment was performed randomized block design, 4 x 2 factorial scheme (shading varieties), four...

ABSTRACT Climatic factors can decisively influence the growth and productivity of agricultural crops. For unconventional vegetables, such as Amazon chicory, sunlight on growing cycle is unknown. The aim this study was to evaluate shading levels productive performance chicory. authors used a randomized block design, with four treatments five replicates. were black polypropylene screens, 30, 50 70% shading, cultivation at full sunlight. Vegetative development production traits evaluated....

ABSTRACT The jambu (Acmella oleracea) production can be influenced by the growing season and light available for metabolic processes. This study aimed to assess agronomic physiological performance of two varieties, under different shading levels, during winter summer Brazilian Amazon. Two random block experiments were conducted, in a 2 x 4 factorial scheme, consisting varieties (yellow purple flower) four levels (0, 30, 50 70 %), with replications. Physiological, growth yield traits...

ABSTRACT The knowledge concerning genetic variability of creole genotypes by using morphological descriptors in species such as Amazon chicory is crucial to quantify local diversity and protect improved cultivars. Accordingly, this study aimed propose multicategory leaf for species. To achieve that, an experiment was arranged randomized block design with four repetitions. treatments comprised eight chicory, which were obtained from producers’ collection. proposed multi-categorical are based...

ABSTRACT Eryngium foetidum L. seeds are still predominantly produced by family farmers, in gardens or small plots, using simple cultivation techniques. The exhibit low germination rates and vigor acquired through exchange between local producers from remnants the area itself. This study aimed to identify yield components that contribute most seed production of Amazon chicory. A randomized block experiment was conducted with four treatments consisting different capitula orders (first, second...

ABSTRACT Associations between different groups of sweet corn traits enable both the direct and indirect selection plants, thus increasing chances success in breeding programs. This study aimed to estimate relationships vegetative productive traits, as well genotypic values, using canonical correlations mixed models. The experiment was carried out a randomized block design, with ten genotypes four replications. following were assessed: plant height, main ear insertion yield ears without...

Introdução: Dor lombar ou lombalgia é uma patologia descrita como atrofia da musculatura região transversal coluna lombar. Indivíduos com quadros de são afetados socialmente, sobretudo pela diminuição capacidade funcional nas tarefas diárias. Dessa forma, o exercício surge importante aliado para a melhoria dor Contudo, parece não haver um consenso na literatura acerca das implicações do em pessoas Objetivo: Analisar, por meio revisão sistemática, as lombar, verificando importância dos...

The development of melon lines resistant to gummy stem blight (GSB) is an important strategy for decreasing losses caused by this disease. Thus, selecting the best parents such a goal essential. We evaluated general (GCA) and specific (SCA) combining abilities accessions guide selection most promising develop GSB-resistant lines. Six genotypes representing two groups (group I - susceptible: group II resistant) were crossed in partial diallel mating design. disease expression using rating...

This study aimed to estimate the production of seeds per umbel and assess both effect gibberellic acid (GA3) order on seed germination in Amazon chicory species. The experiment was conducted two steps. Firstly, traits related were evaluated. Afterward, a test carried out, following parameters assessed: speed index (GSI), average time (AGT), percentage (%G), abnormal seedlings (%AS), non-germinated (%NGS). Remarkably, there strong interaction between analysed factors. highest plant observed...

O emprego da enxertia pode induzir maior vigor nas plantas, produtividade e resistência a patógenos de solo. No entanto, para aplicação seus benefícios é necessário o estabelecimento do estádio ideal sua realização combinação porta-enxerto enxerto mais adequada, ou seja, conhecer relação compatibilidade incompatibilidade entre os mesmos. Diante exposto objetivo deste trabalho utilização diferentes genótipos cucurbitáceas como porta-enxertos meloeiro rendilhado ‘Fantasy’ efeitos sobre...

ABSTRACT The little-known use of okra grafting, mainly to incorporate nematode resistance, requires evaluation interspecific compatibilities. This study aimed determine the compatibility ‘Santa Cruz 47’ cultivar grafted onto different rootstocks Malvaceae family. research was divided into two experimental stages, with treatments consisting non-grafted, self-grafted or plants mallow, roselle and pima cotton. In first stage, a completely randomized design used, four replications seedlings...

ABSTRACT Few genetic resistance sources to root-knot nematodes are known for cotton, and there no cultivars combining both good agronomic attributes in Brazil. Techniques that allow an efficient selection of promising needed. This study aimed identify cotton genotypes resistant Meloidogyne incognita race 3 via REML/Blup. The experiment was completely randomized, with 32 seven replicates, a protected environment. statistical model 83 used. root weight, final population, reproduction factor...

ABSTRACT Amazon chicory is still a little-known vegetable despite its great agronomic potential. The characterization of genotypes concerning genetic divergence key step for breeding programs, as it allows the selection superior individuals and to explore variability complementarity characteristics via interbreeding between newly generated genotypes. In this context, study aimed evaluate among creole from northern Brazilian states Pará Rondônia based on morpho-agronomic traits. We conducted...

MORFOFISIOLOGIA DO CRESCIMENTO INICIAL DE CAFEEIROS SOB SALINIDADE DA ÁGUA IRRIGAÇÃO IDELFONSO LEANDRO BEZERRA1; LUCAS SILVA SANTOS1; VALÉRIA LOPES OLIVEIRA2; FRED MELO TOLEDO3; EMANOEL PEREIRA SAMPAIO4 E DAVID BRAGA CASTRO4 1Professor do Departamento Acadêmico de Agronomia, Fundação Universidade Federal Rondônia – Campus Rolim Moura, Avenida Norte Sul, 3.700, Nova Morada, 76.940-000, Rondônia, Brasil, e-mail: idelfonsobezerra@unir.br; lucas.santos@unir.br. 2Mestranda em Química Tecnológica...