Erradicação de escleródios de Sclerotium rolfsii em substratos tratados em coletores solares, em Campos dos Goytacazes-RJ

Martins, M. V. V.; Silveira, Silvaldo Felipe da; Carvalho, Almy Júnior Cordeiro de; Souza, Elias Fernandes de

doi:10.1590/s0100-29452003000300015

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…In this sense, soil fumigation becomes very important against certain species, such as Rhizoctonia, Pythium and Phytophthora, which have no host specificity and quickly kill plants enzymatically or cause injuries, impairing growth and development (MARTINS et al, 2003). Baptista et al (2006) have reported that treatment of the substrate with methyl bromide significantly reduced the population of nematodes that cause disease in tomato plants.…”

Section: Resultsmentioning

confidence: 99%

The effects of soil fumigation on the growth and mineral nutrition of weeds and crops

et al. 2012

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ABSTRACT. Weeds and soil microorganisms interact with each other in the soil/root interface, promoting the development and establishment of both. The objective of this study was to evaluate the growth and nutrient accumulation in eight species of weeds (Ageratum conyzoides L., Bidens pilosa L., Cenchrus echinatus L., Conyza bonariensis L., Echinochloa crus-galli L., Eleusine indica L. Ipomoea grandifolia L. and Lolium multiflorum L.) and in bean and corn crops grown for 50 days in a substrate fumigated with methyl bromide. Assessments relating to the height, leaf area, leaf number, dry weight of shoots and roots and relative content of nutrients were carried out 50 days after seedling emergence. A positive effect of soil fumigation was observed on the growth, leaf number, leaf area, plant height and accumulation of nutrients in monocot weeds in relation to dicots. Conyza bonariensis was the most affected by soil fumigation, with levels of dry matter, leaf number, leaf area, height and accumulation of nutrients approximately 50% lower than plants grown in normal soil. Fumigation also influenced the growth cycle of the plants, which was lower for B. pilosa, E. indica and C. echinatus. We also observed a 20 and 30% lower phosphorus accumulation in Bidens pilosa and Conyza bonariensis, respectively, when grown in the sterilized soil. Overall, the bean and corn crops were less affected by soil fumigation than the weeds.Keywords: rhizosphere, soil microorganisms, Conyza bonariensis, methyl bromide.Efeito da fumigação do solo no crescimento e nutrição mineral de plantas daninhas e culturas RESUMO. Plantas daninhas e microrganismos do solo se interagem na interface solo/raiz promovendo vantagens para o desenvolvimento e estabelecimento de ambos. Objetivou-se com este trabalho avaliar o crescimento e o acúmulo de nutrientes em oito espécies de plantas daninhas (Ageratum conyzoides L., Bidens pilosa L., Cenchrus echinatus L., Conyza bonariensis L., Echinochloa crus-galli L., Eleusine indica L., Ipomoea grandifolia L. e Lolium multiflorum L.) e nas culturas de feijão e milho, cultivadas, por 50 dias, em substrato fumigado com brometo de metila. Avaliações referentes à altura, área foliar, número de folhas, matéria seca da parte aérea e das raízes e teor relativo dos nutrientes, foram realizados aos 50 dias após emergência das plântulas. Observou-se efeito positivo da fumigação do substrato no crescimento, número de folhas, área foliar, altura de plantas e acúmulo de nutrientes nas plantas daninhas gramíneas em relação às dicotiledôneas. Conyza bonariensis foi a mais afetada pela fumigação do solo, apresentando índices de matéria seca, número de folhas, área foliar, altura e acúmulo de nutrientes em torno de 50% menores em relação às plantas crescidas em solo normal. A fumigação influenciou também o ciclo vegetativo das plantas, sendo este menor para as espécies B. pilosa, E. indica e C. echinatus. Observou-se, ainda, acúmulo de fósforo 20 e 30% menor em plantas de Bidens pilosa e Conyza bonariensis, respectivamente, quando...

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Section: Resultsmentioning

confidence: 99%

The effects of soil fumigation on the growth and mineral nutrition of weeds and crops

et al. 2012

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“…The substrate was subjected to solarization in tubular metal containers (12-cm diameter) for 3 d before use. The temperatures inside the containers (that is, 60–80 o C) are known to eradicate both fungi and nematodes ( Martins et al ., 2003 ). The plants were cultivated in a growth chamber under a 12-hr photoperiod, with illumination of 106 m × mol -1 × m -2 provided by 40-watt fluorescent light tubes.…”

Section: Methodsmentioning

confidence: 99%

Characterizing the Interaction Between Root-knot Nematodes and Soil-borne Fungi which are Pathogenic to Passion Fruit (Passiflora edulis)

Mangeiro

Nunes²,

Vieira

et al. 2022

Journal of Nematology

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For decades there have been anecdotal claims of synergistic interactions between plant-parasitic nematodes and soil-borne fungi causing decline of productivity of passion fruit (Passiflora edulis) orchards. An empirical confirmation of these disease complexes would impact disease management and plant breeding for resistance. To test those claims, we subjected passion fruit plants to single or concomitant parasitism by Meloidogyne javanica or M. incognita and Fusarium nirenbergiae or Neocosmospora sp. under controlled conditions. Non-inoculated plants served as control for the assays. The severity of shoot symptoms and variables related to plant growth, the extent of fungal lesions, and nematode reproduction were assessed to characterize the interactions. The shoot symptoms and effect on plant growth induced by the pathogens varied, but no synergy between the pathogens was observed. Moreover, the volume of tissue lesioned by the fungi was not affected by co-parasitism of the nematodes. Conversely, plant resistance to the nematodes was not affected by co-parasitism of the fungi. The interactions M. incognita-F. nirenbergiae, M. incognita-Neocosmospora sp., M. javanica-F. nirenbergiae, and M. javanica-Neocosmospora sp. were not synergistic as previously claimed, but instead neutral.

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Techniques for the treatment, removal and disposal of host material during programmes for plant pathogen eradication

et al. 2009

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Eradication of plant pathogen incursions is very important for the protection of plant industries, managed gardens and natural environments worldwide. The consequence of a pathogen becoming endemic can be serious, in some cases having an impact on the national economy. The current strategy for eradication of a pathogen relies on techniques for the treatment, removal and disposal of affected host plants. There are many examples where these techniques have been successful but many where they have not. Success relies on a sound understanding of the biology and epidemiology of the pathogen and its interaction with the host. Removal and disposal of infected plant material for eradication and containment of plant and soil inhabiting fungal, bacterial and viral pathogens are reviewed by considering black Sigatoka of banana, apple scab, maize smut, fireblight, citrus canker and sharka disease of stone-fruit crops. In examining examples of dealing with plant pathogens and diseased host material around the world, particularly Australasia, various techniques including burning, burying, pruning, composting, soil-and biofumigation, solarization, steam sterilization and biological vector control are discussed. Gaps in the literature are identified and emphasize the insufficient detail of information available from past eradications. More effort is required to produce and publish scientific evidence to support the success or otherwise of techniques and suggestions for future research are proposed.

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Erradicação de escleródios de Sclerotium rolfsii em substratos tratados em coletores solares, em Campos dos Goytacazes-RJ

Cited by 7 publications

References 13 publications

The effects of soil fumigation on the growth and mineral nutrition of weeds and crops

The effects of soil fumigation on the growth and mineral nutrition of weeds and crops

Characterizing the Interaction Between Root-knot Nematodes and Soil-borne Fungi which are Pathogenic to Passion Fruit (Passiflora edulis)

Techniques for the treatment, removal and disposal of host material during programmes for plant pathogen eradication

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