In vitro compatibility of Trichoderma spp. with fungicides commonly used in cocoa (Theobroma cacao L.)
In this study, we evaluated the compatibility of Trichoderma ovalisporum, T. harzianum, T. koningiopsis and T. stromaticum, (organisms native from cocoa plantations) to three fungicides (Copper oxide, Azoxystrobin, and Copper hydroxide) used in the management of Moniliasis and Witch's broom, in order to integrate chemical and biological control in the integrated management of cacao diseases. T. ovalisporum showed the best development in combination with Azoxystrobin, 88.58% and 88.29% for low and high doses respectively. The other three species, T. harzianum, T. koningiopsis and T. stromaticum, behaved variably according to the dose and the fungicide present in the medium. None species grew in the medium mixed with Copper oxide. Greenhouse tests are recommended to confirm the effects of fungicide mixtures with biocontrol agents.
| Main Authors: | , , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Facultad de Ciencias Agrarias de la Universidad Nacional de Asunción
2019
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| Online Access: | https://www.agr.una.py/revista/index.php/ria/article/view/511 |
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| Summary: | In this study, we evaluated the compatibility of Trichoderma ovalisporum, T. harzianum, T. koningiopsis and T. stromaticum, (organisms native from cocoa plantations) to three fungicides (Copper oxide, Azoxystrobin, and Copper hydroxide) used in the management of Moniliasis and Witch's broom, in order to integrate chemical and biological control in the integrated management of cacao diseases. T. ovalisporum showed the best development in combination with Azoxystrobin, 88.58% and 88.29% for low and high doses respectively. The other three species, T. harzianum, T. koningiopsis and T. stromaticum, behaved variably according to the dose and the fungicide present in the medium. None species grew in the medium mixed with Copper oxide. Greenhouse tests are recommended to confirm the effects of fungicide mixtures with biocontrol agents. |
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