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Nematodes present high potential as a biological indicator of soil quality. In this work, it was evaluated relations between soil physical properties and nematode community under sugarcane cropping and remaining of Atlantic Forest areas in Northeastern Pernambuco, Brazil. Soil samples were collected from September to November 2009 along two 200-m transects(More)
Penetration, post-infectional development, reproduction, and fecundity of Meloidogyne arenaria races 1 and 2 were studied on susceptible (CNS), partially resistant (Jackson), and highly resistant (PI 200538 and PI 230977) soybean genotypes in the greenhouse. The ability to locate and invade roots was similar between races, but more juveniles penetrated(More)
Resistant plant introductions, PI 230977 and PI 200538, and partially resistant Jackson and susceptible CNS were evaluated for seed yield in response to races 1 and 2 of Meloidogyne arenaria. Initial soil population densities (Pi) of the nematode were 0, 31, 125, and 500 eggs/100 cm(3) soil. At the highest Pi, yield suppressions of CNS, Jackson, PI 230977,(More)
The cellular responses induced by Meloidogyne arenaria races 1 and 2 in three soybean genotypes, susceptible CNS, resistant Jackson, and resistant PI 200538, were examined by light microscopy 20 days after inoculation. Differences in giant-cell development were greater between races than among the soybean genotypes. M. arenaria race 1 stimulated small,(More)
Preconsolidation stress (σ p) is an important physical indicator of the load-bearing capacity of soil, which is used for predicting agricultural trafficability. This study aimed to compare prediction models for agricultural trafficability using soil physical attributes as explanatory variables on soils of coastal lands cultivated with sugarcane in the(More)
The purpose of this study was to determine the influence of land use types on nematode assemblage in sugarcane production in Pernambuco State, Brazil. One forest and two managed agricultural soils were characterized by their nematode assemblages to assess their biological characteristics. Soil samples were collected between 2009 and 2010 at three 10-cm(More)
Studies of nematode assemblages in natural ecosystems can contribute to better understanding of the occurrence, relevance, and ecology of plant-parasitic and other soil nematodes. Nematode assemblages and environmental parameters (organic matter, water content (WC), bulk density (BD), total porosity (Po), soil respiration, and soil texture) were(More)
The damage caused by Meloidogyne and Pratylenchus nematodes is included among the factors that limit growth and sustainability of sugarcane production. The objective of this study was to assess the seasonal changes and relationships between plant-parasitic nematode communities and plant variables (leaf chemical analysis and growth parameters) in sugarcane(More)
In the Northeast of Brazil, expansion of guava crops has been impaired by Meloidogyne enterolobii that causes root galls, leaf fall and plant death. Considering the fact that arbuscular mycorrhizal Fungi (AMF) improve plant growth giving protection against damages by plant pathogens, this work was carried out to select AMF efficient to increase production(More)
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