Field testing an oil-based Trichoderma asperellum formulation for the biological control of cacao black pod disease, caused by Phytophthora megakarya

Mbarga, Joseph Bienvenu; Begoude, B.A.D.; Ambang, Zachée; Meboma, M.; Kuaté, Jean; Ewbank, W.; Hoopen, Gerben Martijn Ten

doi:10.1016/j.cropro.2020.105134

Cited by 19 publications

(5 citation statements)

References 10 publications

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“…exhibited a significant growth inhibitory effect against E. turcicum 101. Previous studies have already established T. asperellum as an effective BCA against various plant-pathogenic fungi [ 58 , 59 , 60 ]. Consistent with these findings, our study demonstrated that T. asperellum 576 displayed strong inhibition of E. turcicum 101 growth (80.81% inhibition), and T. atroviride 393 also exhibited notable effectiveness against E. turcicum 101 (77.68% inhibition).…”

Section: Discussionmentioning

confidence: 99%

Biocontrol Potential of Trichoderma asperellum Strain 576 against Exserohilum turcicum in Zea mays

Ma,

Li,

Yang

et al. 2023

JoF

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Maize is a crucial cereal crop in China, serving both as a staple food and an essential industrial resource. Northern corn leaf blight (NCLB) is a disease of corn caused by a fungus, Exserohilum turcicum (sexual stage Setosphaeria turcica). This study aimed to assess the biocontrol potential of various Trichoderma strains against Exserohilum turcicum 101 in Jilin, China. Through dual culture tests, the Trichoderma strains were categorized into four groups based on their antagonistic abilities. Eleven Trichoderma strains exhibited strong antagonistic behavior, with comparable or faster growth rates than E. turcicum 101. Microscopic observations confirmed that T. asperellum 576 hyphae effectively encircled E. turcicum 101 hyphae, reinforcing their antagonistic behavior. The production of non-volatile and volatile substances by the Trichoderma strains was evaluated, with T. asperellum 576 showing the highest potency in producing non-volatile and volatile substances, leading to an impressive 80.81% and 65.86% inhibition of E. turcicum 101 growth. Remarkably, co-culture suspensions of T. asperellum 576 + E. turcicum 101 and T. atroviride 393 + E. turcicum 101 exhibited strong antifungal activity. Furthermore, the activities of chitinase, β-1.3-glucanase, and cellulase were evaluated using the 3, 5-dinitrosalicylic acid (DNS) method. T. asperellum 576 + E. turcicum 101 displayed stronger cell wall degradation enzyme activity compared to T. atroviride 393 + E. turcicum 101, with values of 8.34 U/mL, 3.42 U/mL, and 7.75 U/mL, respectively. In greenhouse conditions, the application of a 107 spores/mL conidia suspension of T. asperellum 576 significantly enhanced maize seed germination and plant growth while effectively suppressing E. turcicum 101 infection. Maize seedlings inoculated/treated with both E. turcicum 101 and T. asperellum 576 demonstrated substantial improvements compared to those inoculated solely with E. turcicum 101. The T. asperellum 576 treatment involved a 107 spores/mL conidia suspension applied through a combination of foliar spray and soil drench. These findings highlight T. asperellum 576 as a promising biocontrol candidate against northern leaf blight in maize. Its antagonistic behavior, production of inhibitory compounds, and promotion of plant growth all contribute to its potential as an effective biocontrol agent for disease management.

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Section: Discussionmentioning

confidence: 99%

Biocontrol Potential of Trichoderma asperellum Strain 576 against Exserohilum turcicum in Zea mays

Ma,

Li,

Yang

et al. 2023

JoF

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“…Trichoderma has potential benefit in control strategies for other cacao diseases such as cacao black pod disease (Deberdt et al, 2008;Mpika et al, 2009;Hanada et al, 2010;Mbarga et al, 2014;Sriwati et al, 2019;Harni et al, 2020;Mbarga et al, 2020), frosty pod rot (Bailey et al, 2008;Mejıá et al, 2008;Leiva et al, 2020); and witches' broom (De Marco and Felix, 2002;De Souza et al, 2008;Loguercio et al, 2009).…”

Section: Biological Control Of Verticillium Wilt Of Cacaomentioning

confidence: 99%

Integrated Management of Verticillium Wilt of Cacao

Bouchon¹,

Hoopen

2022

Front. Agron.

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The vascular disease Verticillium wilt of cacao (Theobroma cacao), caused by the soilborne fungus Verticillium dahliae, is often qualified as a “minor” disease. However, it can cause severe losses locally, for example, in western Uganda and northeast of the Democratic Republic of Congo. This disease is difficult to control, notably due to an extended host range and prolonged survival in the soil. Therefore, Verticillium wilt must be addressed through an integrated disease management strategy as employed for other tree crops such as olive. Few studies, nonetheless, have focused on how to confront this disease in cacao. This paper aims to provide an overview of our knowledge on Verticillium wilt on cacao and the integrated disease management strategies for preventing and controlling it. Promising avenues based on findings in other crops that could be adapted to cacao are also explored. Good agricultural practices, genetic resistance, biological control, induced resistance, and the use of organic amendments with or without biocontrol agents are discussed. Moreover, the potential benefits of some of these solutions toward the resistance to other cacao diseases, abiotic stress, and nutrition improvement are presented.

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“…Moreover, the massive use of pesticides has led to human health problems, polluted environments, and most of the current research to control pests and diseases is aimed at getting rid of pesticides. Today, biological control is a subject of research to control several cocoa pests and diseases [45][46][47]. The development of more resilient cropping systems, including shade management, is also a promising research avenue to reduce biotic pressures in cocoa production [48][49][50].…”

Section: Management In the Context Of The Geographical Spread Of Pests And Diseases And Climate Changementioning

confidence: 99%

Challenges to Cocoa Production in the Face of Climate Change and the Spread of Pests and Diseases

Cilas

Bastide

2020

Agronomy

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The evolution of cocoa farming was quickly confronted with the development of pests and diseases. These sanitary constraints have shaped the geographical distribution of production over the centuries. Current climate change adds an additional constraint to the plant health constraints, making the future of cocoa farming more uncertain. Climate change is not only affecting the areas where cocoa is grown for physiological reasons, particularly in relation to changes in water regimes, but also affects the distribution of pests and diseases affecting this crop. These different points are discussed in the light of the trajectories observed in the different cocoa-growing areas. The breeding programs of cocoa trees for sustainable resistance to plant health constraints and climate change are therefore particularly important challenges for cocoa farming, with the other management practices of plantations.

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Field testing an oil-based Trichoderma asperellum formulation for the biological control of cacao black pod disease, caused by Phytophthora megakarya

Cited by 19 publications

References 10 publications

Biocontrol Potential of Trichoderma asperellum Strain 576 against Exserohilum turcicum in Zea mays

Biocontrol Potential of Trichoderma asperellum Strain 576 against Exserohilum turcicum in Zea mays

Integrated Management of Verticillium Wilt of Cacao

Challenges to Cocoa Production in the Face of Climate Change and the Spread of Pests and Diseases

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