Colonization of the Rhizosphere by Biological Control Agents Applied to Seeds

Chao, Wei-Liang; Nelson, Eric B.; Harman, Gary E.

doi:10.1094/phyto-76-60

Cited by 118 publications

(50 citation statements)

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“…As pesquisas que envolvem essas espécies têm aumentado significativamente devido às facilidades de isolamento e quantificação de propágulos em meios de cultura (PAPAVIZAS, 1982), ao desenvolvimento de novas técnicas de sobrevivência e proliferação no solo e na rizosfera (CHAO et al, 1986) e, ainda, à existência de novos biotipos resistentes a fungicidas (ADB-EL MOITY et al, 1982;PAPAVIZAS, 1982).…”

Section: Introductionunclassified

Inoculação de sementes de milho utilizando o Trichoderma harzianum como promotor de crescimento

Resende

Oliveira²,

Guimarães³

et al. 2004

Ciênc. agrotec.

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RESUMOConduziu-se este trabalho com o objetivo de estudar o efeito do fungo Trichoderma harzianum como promotor de crescimento de sementes de milho tratadas com diferentes fungicidas. O experimento foi realizado em vasos em casa-devegetação, adotando o delineamento experimental inteiramente casualizado em esquema fatorial (3x2), utilizando os tratamentos com fungicidas: Captan®, Maxim® e testemunha e inoculação (com e sem inóculo) em quatro repetições. As características agronômicas avaliadas foram: altura de planta, peso da matéria seca da parte aérea e de raízes e também a técnica de isolamento do fungo nas raízes aos 45 dias após semeadura. Observou-se diferença significativa somente para o fator inóculo na característica peso de matéria seca de raízes. Pelos resultados obtidos, verificou-se que o fungo Trichoderma harzianum estimulou maior acúmulo de matéria seca nas raízes das plantas de milho e também estava presente nas raízes das plantas oriundas de sementes inoculadas, independentemente do tratamento fungicida das sementes. Termos para indexação:Trichoderma harzianum, promotor, crescimento, milho. ABSTRACTThe objective of this work was to study the effect of the fungus Trichoderma harzianum as a growth promoter on the corn seeds treated with different fungicides. This experiment was carried out in pots in a greenhouse by adopting the experimental completely randomized design in (3 X 2) factorial scheme, by utilizing the treatments with fungicides: Captan®, Maximim® and control and inoculation (with and without an inoculum) with four replicates. The agronomic characteristics evaluated were: plant height, shoot and root dry matter weight and also the inoculum isolation technique on the rots after sowing. Significant differences were found only for the factor inoculum in the characteristic root dry matter weight. The results obtained revealed that the fungus Trichoderma harzianum stimulated greatest dry matter accumulation in the roots of corn plants and also it was present in the roots of plants from inoculated seeds regardless of the treatment of the seeds with fungicides.

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Section: Introductionunclassified

Inoculação de sementes de milho utilizando o Trichoderma harzianum como promotor de crescimento

Resende

Oliveira²,

Guimarães³

et al. 2004

Ciênc. agrotec.

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“…This has been variously attributed to; predation, competition and nutrient limitation (Thompson et al 1990); the variability of physical, chemical, microbiological and environmental factors (Kim and Misaghi 1996); and poor root surface colonization or an inability to be transported through the soil profile via the root (Chao et al 1986). …”

Section: Introductionmentioning

confidence: 99%

Colonization of the developing rhizosphere of sugar beet seedlings by potential biocontrol agents applied as seed treatments

Walker¹,

Rossall

Asher³

2002

J Appl Microbiol

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“…Moreover, the combination of such biological control agents (BCAs) with reduced levels of fungicide (integrated control) promotes a degree of disease suppression similar to that achieved with full fungicide treatment [22]. Moreover, the application of biological controls using antagonistic microorganisms, has proved to be successful for controlling various plant diseases in many countries [1,[23][24][25][26]. Mean values within columns followed by the same letter are not significantly different (P ≤ 0.05).…”

Section: Resultsmentioning

confidence: 99%

Different Approaches of Bio-control Agents for Controlling Root Rot Incidence of Some Vegetables under Greenhouse Conditions

Abdel-Kader¹,

El-Mougy²,

Aly³

et al. 2012

IJAF

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Different approaches of some antagonistic fungal, bacterial and yeast agents applied as seed treatment or soil drench was evaluated against various soil-borne pathogens causing vegetables root rot disease under greenhouse conditions. The tested pathogenic fungi were Alternaria solani Fusarium solani, F. oxysporum, Rhizoctonia solani, Sclerotium rolfsii, Macrophomina phaseolina and Pythium sp., meanwhile the tested bio-agents were Trichoderma harzianum, T. Viride and Bacillus subtilis, Pseudomonas flourescens and Sacchromyces serivisae. Significant reduction in the disease incidence was observed in bio-agent treatments in comparison with untreated control. Root rot incidence, at pre-emergence stage, significant effect was observed in bio-agent treatments as seed soaking comparing with soil drench treatment. The treated seeds showed a protective effect for seeds germination against the invasion by soil-borne pathogenic fungi. Meanwhile, soil drenched with different bio-agents showed more efficacy for reducing root rot incidence at post-emergence growth stage of tested vegetables, Cucumber, Cantaloupe, Tomato and Pepper. The obtained results revealed that the antagonist T. harzianum showed significant superior effect to reduce diseases incidence followed by B. subtilis. Also, the antagonists T. viride and P. fluorescence occupied significantly the second degree for reducing root rot incidence. The treatment with S. serevisiae had the lowest effect on disease incidence, although it significantly lesser than check control treatment. The present study demonstrates that application of bio-agents as seed treatment and soil drench may be useful for controlling root rot disease in field.

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Colonization of the Rhizosphere by Biological Control Agents Applied to Seeds

Cited by 118 publications

References 0 publications

Inoculação de sementes de milho utilizando o Trichoderma harzianum como promotor de crescimento

Inoculação de sementes de milho utilizando o Trichoderma harzianum como promotor de crescimento

Colonization of the developing rhizosphere of sugar beet seedlings by potential biocontrol agents applied as seed treatments

Different Approaches of Bio-control Agents for Controlling Root Rot Incidence of Some Vegetables under Greenhouse Conditions

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