The objective of this study was to compare the ex situ and in floristic diversity soil weed seed bank a rice field northeastern Brazil. In county Bacabal, located state Maranhão, thirty 25-m² plots were laid out. From 15 plots, samples (6/plot; n = 90) taken with probe (25 × 16 3 cm) placed aluminum trays greenhouse. remaining same probe. number seeds estimated by germination. We evaluated numbers species individuals, as well density, frequency, abundance importance value (IV) for each...

This study searches for efficient and low environmental impact alternatives to control Spodoptera frugiperda.Application of elicitors capable inducing resistance in plants has already been highlighted.The trigger the plant's defense capacity against attack herbivores phytopathogenic organisms.Thus, present aimed evaluate effect on some biological aspects food preference frugiperda (J.E. Smith) corn laboratory conditions.The treatments consisted of: Control (distilled water); Biofertilizer...

Os objetivos desta pesquisa foram identificar e avaliar a estrutura das comunidades diversidade espécies herbáceas invasoras presentes no banco de sementes do solo, em áreas cultivo subsistência nos Municípios Bacabal, Lago Verde, São Luís Gonzaga Vitorino Freire, localizados trechos da Floresta Ombrófila Aberta com Babaçu, Maranhão. Em cada município alocadas 15 parcelas 50 m2, onde retiradas 90 amostras solo um gabarito metal vazado 25 x 16 3 cm colocadas bandejas casa telada. Foi avaliado...

Germination, floristic composition and phytosociology in the soil weed seed bank are important to know flora predict infestations. The objective of this research was assess compare germination, rice intercropped with corn fields Maranhão State, northeastern Brazil by germination method greenhouse sampling field. Phytosociological parameters computed were frequency, density, abundance importance value each species. Diversity assessed Shannon’s Index. We recorded a total 1,998 individuals from...

ABSTRACT: In organic systems during the dry season, competition of weeds with okra increases critical period interference these species and yield losses. The objective this research was to determine weed in season São Luís - MA. experiment conducted from October/2014 January/2015 randomized blocks, four replicates. treatments were periods 07, 14, 21, 28, 35, 42 days after transplanting crop control coexistence infesting community. highest importance value index Cynodon dactylon, Eleusine...

The objective of this research was to assess the density, floristic composition, phytosociology and diversity a soil weed seed bank ex situ by germination in greenhouse sampling on smallholder corn field located Lago Verde County, Maranhão State. Fifteen pairs 25 m2 plots were designated. In half these plots, 90 samples collected with an open metal template measuring x 16 3 cm placed germinate. other half, using same template. We recorded total 1,998 individuals from 40 species, 31 genera...

Knowledge of weed floristic composition and phytosociology are key factors for improving management in pastures. Information on species that occur pastures Northeast Brazil, particularly Maranhão State is very limited. It is, therefore, important, to search information help farmers control weeds livestock farming. This paper describes the flora diversity community structure parameters, including density, frequency, abundance importance value each found five same age State, Brazil. The survey...

ABSTRACT: Knowledge of the floristic composition and vegetation structure are essential conditions for development more efficient economic weed management strategies in crops humid tropics. The objective research was to carry on phytosociological surveys know main weeds upland rice fields tropics Brazilian State Maranhão. Weed samples were done by means an open metal rectangle 0.15 m2 thrown at random vegetative reproductive stages crop 2009/10 2010/2011 harvest. A total 65 species from 23...

ABSTRACT Brazil is the third largest fruit producer in world, but many native fruits remain underexploited, as case for mangabeira (Hancornia speciosa Gomes). Little known about general aspects of this species its naturally occurring environment. Thus, study aimed to characterize plant and morphologies from selections Savannah-Restinga vegetation transition zone. The experiment was carried out Patizal, Recanto Recurso villages located Morros municipality, Maranhão State, dominated by...

Vegetable biodiversity in Brazil accounts for almost 67% of the plants on planet, which are part studies with focus determinants food security and access to adequate healthy food, while preserving natural resources. Studies indicate that Hibiscus sabdariffa L. is one most studied unconventional crops because its nutraceutical quality as antioxidant prevention hypertension cancer. Although relevant, substrate temperature information seedling production this species scarce. Thus, aim study was...

In Brazil the Caatinga biome is formed by endemic species with numerous applications in medicine, cosmetics and agrochemicals. However, only 8% of country’s plant are chemically evaluated annually. Thus, work aimed to determine free amino acid composition phenolic substances extracts, their antioxidant activity potential use these compounds control A. alternata citrus. Leaf extracts from fourteen native were for contents; total individual polyphenols; flavonoids antifungal...

Assessment of floristic composition, phytosociology and diversity weed communities are crucial for control in chives. A survey was conducted on two selected chives cropping fields the state Maranhão, northeastern Brazil to identify flora most important species associated with The carried out by quadrat method 30 samples taken from each field. Phytosociological parameters assessed were absolute relative densities, frequencies abundances importance value species. Weed Shannon Diversity Index...

Studies in the area of allelopathy agriculture have increased due to search on alternative methods weed control compared conventional herbicides. Thus, objective this work was evaluate chemical composition and phytotoxicity Lippia origanoides essential oil weeds species Bidens subalternans, Euphorbia heterophylla Macroptilium lathyroides. The extracted from leaves L. by means hydrodistillation diluted concentrations 0.01 1%. chemistry determined a gas chromatograph coupled with mass...

HIGHLIGHTS Herbaceous cutting of acerola cherry in vermiculite substrate are recommended to higher rooting rate. The use soil and tanned bovine manure as is promising produce seedlings

ABSTRACT Roselle (Hibiscus sabdariffa L.) cultivation in tropical and subtropical regions is carried out by family farmers without the use of technology with low yields. This study aimed to evaluate organic mineral fertilizers roselle growth nutrition São Luís, State Maranhão, northeastern Brazil. The experiment was conducted a randomized block design factorial scheme [(7x2)+1]. treatments consisted seven doses poultry litter (0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 L), six percentages NPK (100.0,...

Brazil has a range of fruit species, especially native ones, which play an important role in the life local populations, but are still little studied, as is case bacuri (Platonia insignis Mart.). P. tree species from Amazon region and great economic potential, mainly due to its excellent organoleptic nutritional characteristics. Therefore, there need for research that seeks proper use well selection superior genotypes. Thus, objective this study was characterize biometric chemically fruits...

The objective of this research was to assess the potential abiotic compounds as defense response enhancers in maize using enzymatic quantification and their efficiency reduction damages caused by S. frugiperda. experiment laid out a randomized complete block design with six treatments five replications. were: T1: positive control (distilled water + infestation); T2: negative (without product application, uninfested); T3: biofertilizer; T4: acibenzolar-S-methyl (ASM); T5: potassium silicate;...

The aim of this study was to evaluate the effect mulching with dry leaves babassu palm (Orbygnia phalerata Mart.) on germination weed seed bank rice tiller number and grain yield maize in Maranhão state, northeastern Brazil. In field experimental design a split plot randomized complete block 15 replications. Rice, intercropped were allocated main plots treatments unprocessed whole dried (0 23 t ha-1) subplots. Germination assessed after crop harvest greenhouse by means collection three soil...

The anthropic interference in aquatic ecosystems favors the disordered colonization of T. domingensis, damaging production hydroelectric power and river traffic. Because this, studies report efficacy fungal mycoherbicides, with control rates reaching as high 90%. Thus, objective this study was to evaluate potential C. typhae a mycoherbicide bio at vitro greenhouse conditions. 107 samples symptomatic domingensis leaves were collected flooded areas rivers Brazil, identification isolation...

Spontaneous plants are biological factors that compromise the yield of vegetables. The hypothesis is green manure intercropped with okra suppress spontaneous and increase production this vegetable. research aimed to evaluate viability vegetable productivity. design was in randomized blocks four replications 10 treatments: cowpea [Vigna unguiculata (L). Walp.], sunn hemp (Crotalaria juncea L.), velvet bean [Mucuna nivea (L.) DC.] dwarf pigeon pea [Cajanus cajan Huth] intercropping monoculture...

The mangabeira (Hancornia speciosa Gomes) has great food and pharmaceutical values but its production is almost entirely made by people gathering fruits in forests, which increases the risk extinction, particularly savannah regions. Thus, objective of this study was to compare floristic, phytosociology species diversity five areas natural occurrence mangabeira. All plants with a diameter at soil level equal or greater than cm were selected quadrant method villages state Maranhão,...

This study evaluated the soil seed bank’s germination potential and density in five distinct environmental areas namely: a) regenerated forest, b) secondary c) degraded pasture, d) Eucalyptus sp. plantation e) fallow corn growing area, with a view to regenerate forests Western Amazonia using tray methodology. We assessed floristic similarity diversity Jaccard Similarity Index Shannon Diversity Index, respectively. computed each species’ phytosociological parameters: density, frequency...