Colonization of cacao seedlings by Trichoderma stromaticum, a mycoparasite of the witches’ broom pathogen, and its influence on plant growth and resistance

Souza, Jorge Teodoro de; Bailey, Bryan A.; Pomella, A. W. V.; Erbe, Eric F.; Murphy, Charles; Bae, Hanhong; Hebbar, Prakash K.

doi:10.1016/j.biocontrol.2008.01.010

Cited by 68 publications

(36 citation statements)

References 29 publications

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“…Ramesh et al 2009), endophytic filamentous fungi (e.g. Mucciarelli et al 2003, Souza et al 2008) and endophytic yeasts (Nassar et al 2005) were also shown to promote plant growth.…”

Section: Discussionmentioning

confidence: 99%

Performance of three endophytic actinomycetes in relation to plant growth promotion and biological control of Pythium aphanidermatum, a pathogen of cucumber under commercial field production conditions in the United Arab Emirates

2010

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In the current study, the performance of three endophytic actinomycetes identified as Actinoplanes campanulatus, Micromonospora chalcea and Streptomyces spiralis previously shown to reduce seedling damping-off, and root and crown rots of mature cucumber (Cucumis sativus) caused by Pythium aphanidermatum in pots under greenhouse conditions were further evaluated to determine their potential as biological control agents and as plant growth promoters in the field under the conditions of commercial production of cucumbers in the United Arab Emirates (UAE). When applied individually or in combination to cucumber seedlings, the three isolates significantly promoted plant growth and yield and reduced seedling damping-off and root and crown rots of mature cucumber plants. Individually the performance level of S. spiralis was relatively the best followed by A. campanulatus and then by M. chalcea. The three isolates (which were not inhibitory to each other) performed better, both as biological control agents as well as plant growth promoters, when applied together than when they were inoculated individually. The ability of these three isolates to colonize the internal tissues of roots, stems and leaves under field conditions, and to persist up to 8 weeks after seedling inoculation, showed that they can easily adapt to an endophytic habit systemically within healthy cucumber plants. As the three endophytic actinomycete isolates also colonized the rhizosphere and showed outstanding rhizosphere competency it is clear that they are facultative and not obligate endophytes. The success with the three inoculants indicated that they could well be used in place of the fungicide metalaxyl which is currently recommended for the management of Pythium diseases in the UAE. This is the first successful field use of endophytic actinomycetes as promising plant growth promoters and biological control agents against Pythium diseases of cucumber.

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“…Ramesh et al 2009), endophytic filamentous fungi (e.g. Mucciarelli et al 2003, Souza et al 2008) and endophytic yeasts (Nassar et al 2005) were also shown to promote plant growth.…”

Section: Discussionmentioning

confidence: 99%

Performance of three endophytic actinomycetes in relation to plant growth promotion and biological control of Pythium aphanidermatum, a pathogen of cucumber under commercial field production conditions in the United Arab Emirates

2010

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“…(e.g. De Souza et al, 2008;Krauss et al, 2006Krauss et al, , 2010Tondje et al, 2007). In the case of Witches' broom this has even led to the development of a registered biological control product, called Trichovab® (Samuels, 2004), based on Trichoderma stromaticum, being used in a Brazilian government funded program to control M. pemiciosa.…”

Section: Introductionmentioning

confidence: 99%

A new oil-based formulation of Trichoderma asperellum for the biological control of cacao black pod disease caused by Phytophthora megakarya

et al. 2014

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HIGHLIGHTS• New oil-based dispersion with a half-life of T. asperellum conidia of 22.5 weeks.• Complete inhibition of P. megakarya on sprayed detached pods.• Enhanced rate and duration of protection on sprayed cacao pods in the field.• 50% of pods protected 3.2 weeks after spraying in the field.• Formulation suitable for the spraying equipment of small-scale cacao producers. GRAPHICAL ABSTRACTFormulated conidia of Trichoderma provide similar or even better protection of cacao pods against black pod disease than a conventional fungicide. ABSTRACTIn African cacao-producing countries, control of cacao black pod disease caused by Phytophthora megakarya is a priority. Introducing biological control agents as part of a P. megakarya control strategy is highly desirable, especially in a perspective of pesticide reduction. Trichoderma species are among the most used biological control agents. In Cameroon, Trichoderma asperellum formulated in wettable powder has produced positive effects against this disease. However, with this type of formulation, shelf-life and persistence of conidia on pods are limited. Our study therefore sought to develop a new T. asperellum formulation that would be more effective and better suited to the conditions of field application by small-scale producers in Cameroon. We selected a soybean oil-based oil dispersion, in which the half-life of the conidia reached 22.5 weeks, versus 5 weeks in Published in : Biological Control (2014), vol. 77, pp. 15-22 Status : Postprint (Author's version) aqueous suspension. Tested on detached pods, the formulation completely inhibited the development of the disease. When sprayed in the field on cacao clones highly sensitive to P. megakarya, the formulation resulted in 90% protection of treated pods after 1 week, and 50% after 3.2 weeks. The formulations exercised a measurable effect for up to 7 weeks, versus 2 weeks in the case of an aqueous conidial suspension and 5 weeks for that of a conventional fungicide (Kocide). Trichoderma asperellum formulated in oil dispersion has therefore great potential for the control of cacao black pod disease with less recourse to synthetic fungicides.

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“…En otros estudios, varias especies de endófitos fueron recuperados de diferentes fragmentos de la planta (raíces, hojas o ramas), mientras que otros pueden infectar a varias de estas secciones (Bacon & Hinton, 1996;Bailey et al, 2006;Carroll, 1988;De Souza et al, 2008), lo que sucedió con las cepas estudiadas que colonizaron diferentes tejidos de plantas de quinua a los 30 y 60 días de evaluación.…”

Section: Cepas Deunclassified

Cepas de Trichoderma con capacidad endofitica sobre el control del mildiu (Peronospora variabilis Gäum.) y mejora del rendimiento de quinua

Ttacca

Calcina

Ticona

et al. 2018

Rev. investig. altoandin.

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Colonization of cacao seedlings by Trichoderma stromaticum, a mycoparasite of the witches’ broom pathogen, and its influence on plant growth and resistance

Cited by 68 publications

References 29 publications

Performance of three endophytic actinomycetes in relation to plant growth promotion and biological control of Pythium aphanidermatum, a pathogen of cucumber under commercial field production conditions in the United Arab Emirates

Performance of three endophytic actinomycetes in relation to plant growth promotion and biological control of Pythium aphanidermatum, a pathogen of cucumber under commercial field production conditions in the United Arab Emirates

A new oil-based formulation of Trichoderma asperellum for the biological control of cacao black pod disease caused by Phytophthora megakarya

Cepas de Trichoderma con capacidad endofitica sobre el control del mildiu (Peronospora variabilis Gäum.) y mejora del rendimiento de quinua

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