Sensibilidade de isolados de Trichoderma spp. a fungicidas registrados para tratamento de sementes de algodão
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Universidade Federal de Viçosa
Abstract
A agricultura 4.0 trouxe mudanças significativas na forma como os produtores manejam pragas e doenças, tornando necessária a adaptação a novas estratégias. O uso de agrotóxicos é amplamente adotado, enquanto alternativas sustentáveis, como agentes biológicos, ganham espaço. No entanto, a combinação dessas estratégias exige estudos para avaliar sua compatibilidade. Assim, este trabalho avaliou o efeito de três inseticidas (Avicta®, Cruiser® e Fortenza®) e três fungicidas (Vitavax Thiram 200 SC®, Certeza® e Dynasty®,) no crescimento in vitro de cinco isolados de Trichoderma spp., provenientes de coleções públicas. Os resultados indicaram que os inseticidas tiveram menor impacto, sendo Avicta® o mais compatível. Por outro lado, os fungicidas Thiram® e Certeza® inibiram completamente o crescimento dos isolados testados, demonstrando forte sensibilidade. Observou-se ainda que a tolerância aos agrotóxicos variou entre os isolados, destacando-se o IBCB19/17 pela maior resiliência, enquanto o IBLF 1276 e o IBLF 1278 foram os mais sensíveis. Esses resultados ressaltam que a aplicação simultânea de Trichoderma spp. e agrotóxicos exige planejamento criterioso, considerando a seleção adequada de isolados e a compatibilidade entre os produtos utilizados. Palavras-chave: Controle biológico; Agrotóxicos; Compatibilidade; Manejo integrado ; Bioinsumo.
Agriculture 4.0 has brought significant changes to the way producers manage pests and diseases, making it necessary to adapt to new strategies. The use of chemical pesticides is widely adopted, while sustainable alternatives, such as biological agents, are gaining ground. However, the combination of these strategies requires studies to assess their compatibility. Thus, this work evaluated the effect of three insecticides (Avicta®, Cruiser® and Fortenza®) and three fungicides (Vitavax Thiram 200 SC®, Certeza® and Dynasty®,) on the in vitro growth of five isolates of Trichoderma spp., from public collections. The results indicated that insecticides had less impact, with Avicta® being the most compatible. On the other hand, the fungicides Thiram® and Certeza® completely inhibited the growth of the tested isolates, demonstrating strong sensitivity. It was also observed that tolerance to pesticides varied between isolates, with IBCB19/17 standing out for its greater resilience, while IBLF 1276 and IBLF 1278 were the most sensitive. These results highlight that the simultaneous application of Trichoderma spp. and deactivated chemical pesticides careful planning, considering the appropriate selection of isolates and the compatibility between the products used. Keywords: Biologicol control; Pesticides; Compatibility; Integrated management; Bioinputs
Agriculture 4.0 has brought significant changes to the way producers manage pests and diseases, making it necessary to adapt to new strategies. The use of chemical pesticides is widely adopted, while sustainable alternatives, such as biological agents, are gaining ground. However, the combination of these strategies requires studies to assess their compatibility. Thus, this work evaluated the effect of three insecticides (Avicta®, Cruiser® and Fortenza®) and three fungicides (Vitavax Thiram 200 SC®, Certeza® and Dynasty®,) on the in vitro growth of five isolates of Trichoderma spp., from public collections. The results indicated that insecticides had less impact, with Avicta® being the most compatible. On the other hand, the fungicides Thiram® and Certeza® completely inhibited the growth of the tested isolates, demonstrating strong sensitivity. It was also observed that tolerance to pesticides varied between isolates, with IBCB19/17 standing out for its greater resilience, while IBLF 1276 and IBLF 1278 were the most sensitive. These results highlight that the simultaneous application of Trichoderma spp. and deactivated chemical pesticides careful planning, considering the appropriate selection of isolates and the compatibility between the products used. Keywords: Biologicol control; Pesticides; Compatibility; Integrated management; Bioinputs
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LOPES, Sávio dos Santos. Sensibilidade de isolados de Trichoderma spp. a fungicidas registrados para tratamento de sementes de algodão. 2025. 27 f. Dissertação (Mestrado Profissional em Defesa Sanitária Vegetal) - Universidade Federal de Viçosa, Viçosa. 2025.
