Strong repellency of the root knot nematode,Meloidogyne incognita by specific inorganic ions

Castro, C. E.; Belser, N. O.; McKinney, H. E.; Thomason, I. J.

doi:10.1007/bf01021019

Cited by 33 publications

(29 citation statements)

References 4 publications

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“…The influence of various types of soil on the distribution of nematodes has been reported by many Ž authors Castro et al, 1990;Norton, 1979Norton, , 1989. Prot and van Gundy, 1979 .…”

Section: Introductionmentioning

confidence: 99%

Identification of soil factors that relate to plant parasitic nematode communities on tomato and yam in the French West Indies

Cadet

Thioulouse

1998

Applied Soil Ecology

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Ž. A soil and nematode survey of tomato and yam crops was made in Martinique French West Indies . Each sample was divided into two parts, one for the nematode study and one for the soil analysis. The coupling of the data was made using the coinertia analysis. For tomato plants which were grown from seeds, the nematode-soil relationships were very strong. For the two varieties of yams, Dioscorea cayenensis-rotundata and D. alata, whose infested seed tubers carry nematodes into the field, the relationships were weaker and depended on the yam variety. For D. cayenensis-rotundata, which was attacked by the endemic parasite Pratylenchus coffeae, the relationship between nematode community and soil type was strong. For D. alata, this relationship was weaker because it is mainly parasitised by the exotic species, Scutellonema bradys, which is exclusively introduced into the field with the seed tuber, whatever the soil type. Soil texture was the most important factor explaining the presence of some species. However, Meloidogyne spp. and the ectoparasitic species such as Xiphinema spp. were associated with light andosols; Aorolaimus luci needed, in addition, higher levels of organic matter. P. coffeae preferred any type of soil rich in organic matter and its abundance seemed influenced by calcium and magnesium content or pH. In contrast, P. brachyurus did not appear to be sensitive to any of the measured physico-chemical soil characteristics. q

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“…The influence of various types of soil on the distribution of nematodes has been reported by many Ž authors Castro et al, 1990;Norton, 1979Norton, , 1989. Prot and van Gundy, 1979 .…”

Section: Introductionmentioning

confidence: 99%

Identification of soil factors that relate to plant parasitic nematode communities on tomato and yam in the French West Indies

Cadet

Thioulouse

1998

Applied Soil Ecology

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“…Specific ions, on the other hand, may attract or repel nematodes (1,2,33) and thereby affect the number of nematodes encountering conidia. Similarly, specific ions and osmotic potential may enhance or suppress Hirsutella rhossiliensis (5,20,21).…”

Section: Discussionmentioning

confidence: 99%

Soil pH and the Activity of a Pelletized Nematophagous Fungus

Jaffee¹,

Zasoski²

2001

Phytopathology®

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When formulated as assimilative hyphae in alginate pellets, the nematophagous fungus Hirsutella rhossiliensis was more active (i.e., parasitized more assay nematodes) in an acidic vineyard soil than in a neutral vineyard soil. To determine whether soil pH explained the difference, fungus activity was measured in soil from the neutral site that had been acidified (by adding sulfuric acid) and in soil from the acidic site that had been neutralized (by adding calcium hydroxide). As hypothesized, the activity of pelletized Hirsutella rhossiliensis was negatively correlated with soil pH. Maximum activity occurred at pH(calcium chloride) 4.5, and activity gradually declined to near zero as the pH increased to 6.5 and rapidly declined to near zero as the pH dropped below 4.0. Assays performed on leached soil samples indicated that the effects of sulfuric acid and calcium hydroxide were largely due to pH rather than to specific ions or osmotic potential. The effect of pH, however, was indirect. Heating the neutral soil to 60 degrees C for 2 h did not alter soil pH or electrical conductivity but increased fungus activity to levels equivalent to those in acidified soil. We conclude that, in these two soils, heat treatment or low soil pH suppresses soil organisms that otherwise interfere with growth of Hirsutella rhossiliensis from alginate pellets.

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“…Vinasse application in the study area may have influenced the results described because it is a residue rich in organic matter, which provides energy (carbon) to edaphic microfauna, thus promoting biomass increasing and its activity (MENG et al, 2009). Vinasse also presents high levels of potassium and the presence of this ion in the soil can cause plant-parasitic nematode population reduction, as it interferes with the development of certain species of the genus Meloidogyne (CASTRO et al, 1990). This corroborates the study conducted by Pedrosa et al (2005), who observed a reduction of juvenile hatching and a population density of M. incognita and M. javanica after vinasse application.…”

Section: Resultsmentioning

confidence: 99%

Relationship between soil organic matter and nematodes in sugarcane fields

Barros¹,

Pedrosa²,

Cardoso³

et al. 2017

SCA

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Sugarcane plays an important socio-economic role in northeastern Brazil. However, the low yield in this region is associated with several factors (e.g. frequent occurrence of plant-parasitic nematodes). In order to observe the influence of soil organic matter on the nematodes, this study aimed to characterize the spatial nematode distribution in a sugarcane field. The study was carried out in Goiana -Pernambuco State (Brazil), fifty days after sugarcane cutting (10 days after vinasse application). The sampling scheme consisted of a regular 60 × 50-m grid, 10 m spaced, through 0 to 0.2 m depth. Spatial distribution was evaluated by semivariograms fit and performed by ordinary kriging interpolation for mapping. Exponential and spherical models promoted the best fit to semivariograms, resulting in ranges from 16 to 19 m. There was a strong negative correlation between soil organic matter and plantparasitic nematode population density. Free-living nematodes had a similar distribution pattern as soil organic matter content. These results indicated that soil organic matter had important effects on spatial distribution of both plant-parasitic and free-living nematodes. Key words: Soil microfauna. Semivariogram. Spatial variability. Vinasse. ResumoA cana-de-açúcar desempenha importante papel socioeconômico para o Nordeste Brasileiro. Por outro lado, a baixa produtividade nesta região está associada a diversos fatores, dentre estes, a relevante presença de nematoides fitoparasitas. A fim de verificar a influência da matéria orgânica sobre os nematoides, o objetivo deste estudo foi caracterizar a distribuição espacial da matéria orgânica e da nematofauna em área cultivada com cana-de-açúcar fertirrigada com vinhaça. O estudo foi realizado no município de Goiana, Zona da Mata Norte de Pernambuco, 50 dias após corte da cana (10 dias após aplicação da vinhaça). Utilizou-se um sistema de amostragem em malha regular de 60 × 50 m, com espaçamento de 10 m, na profundidade de 0-0,2 m. A distribuição espacial foi avaliada por meio de ajustes de semivariogramas e realizada interpolação por krigagem ordinária para mapeamento. O modelo esférico e o exponencial proporcionaram melhor ajuste aos semivariogramas, com alcances de 16 a 19 m. A matéria orgânica correlacionou-se negativamente com a população dos nematoides fitoparasitas. O mapeamento permitiu observar padrões de distribuição espacial similares entre as comunidades de nematoides de vida livre e a matéria orgânica. Esses resultados indicam que a matéria orgânica tem um papel importante na distribuição espacial dos nematoides fitoparasitas e de vida livre. Palavras-chave: Microfauna do solo. Semivariograma. Variabilidade espacial. Vinhaça.

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Strong repellency of the root knot nematode,Meloidogyne incognita by specific inorganic ions

Cited by 33 publications

References 4 publications

Identification of soil factors that relate to plant parasitic nematode communities on tomato and yam in the French West Indies

Identification of soil factors that relate to plant parasitic nematode communities on tomato and yam in the French West Indies

Soil pH and the Activity of a Pelletized Nematophagous Fungus

Relationship between soil organic matter and nematodes in sugarcane fields

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