Hydrothermal treatment in the management of anthracnose in ‘Prata-Anã’ banana produced in the semiarid region of Minas Gerais, Brazil

Abstract

-Anthracnose stands out among rot diseases that can occur in the post-harvest phase of banana. The aim of this study was to evaluate the thermotherapy in the control of anthracnose in 'Prata Anã' banana produced in northern state of Minas Gerais. Bananas 'Prata Anã' variety were divided into groups of three fruits and inoculated with Colletotrichum musae. Groups were submitted to thermotherapy using five temperatures (40°C, 44°C, 48°C, 52°C and 56°C) and four immersion times (4, 8, 12 and 16 minutes) and control. Treatments were repeated five times in a completely randomized design. Area under the incidence progress curve (AUIPC) and area under the severity progress curve (AUSPC) were calculated. To evaluate the thermotherapy efficiency compared to chemical control, fruits were submitted to the following treatments: thermotherapy with and without fungicide application and fruits treated with fungicide only, the control fruits without thermotherapy and without fungicide application. After fifteen days of storage, fruits were evaluated for anthracnose severity. The results of experiments were submitted to analysis of variance and regression and means were compared by the Scott-Knott test (p<0.05). Control was compared to treatments by the Dunnett test (p<0,05). The lowest anthracnose AUIPC values were observed when using temperature of 48°C for eight and 12 minutes. Thermotherapy at 52°C from eight minutes of immersion, in addition to reducing the anthracnose AUSPC in fruits up to 81.6%, delayed maturation of fruits. Fruits submitted to thermotherapy at 56°C presented higher severity of the disease and resulted in the maturation of fruits. Thermotherapy reduces anthracnose severity in fruits in a manner similar to fungicide use, but the association of both results in better control of the disease in 'Prata Anã' banana. Thermotherapy is an efficient technique to reduce the severity of the disease in 'Prata Anã' banana produced in northern state of Minas Gerais. Index terms: Colletotrichum musae, thermotherapy, incidence, severity.Tratamento hidrotérmico no manejo da antracnose em banana 'Prata-anã' produzida no semiárido mineiroResumo -A antracnose destaca-se dentre as podridões que podem ocorrer na fase pós-colheita da banana. O objetivo do trabalho foi avaliar a termoterapia no controle da antracnose em banana 'Prata-Anã' produzida no norte de Minas Gerais. Bananas da variedade Prata-Anã foram divididas em buquês de três frutos e inoculadas com Colletotrichum musae. Os buquês foram submetidos à termoterapia com cinco temperaturas (40°C, 44°C, 48°C, 52°C e 56°C) por quatro tempos de imersão (4; 8; 12 e 16 minutos) e testemunha. Os tratamentos foram repetidos cinco vezes em delineamento inteiramente casualizado. Calculou-se a área abaixo da curva de progresso da incidência (AACPI) e a área abaixo da curva de progresso da severidade (AACPS). Para a avaliação da eficiência da termoterapia comparada ao controle químico, os frutos foram submetidos aos seguintes tratamentos: termoterapia com e sem aplicação de ...

Biorreguladores del Crecimiento en la Reproducción de Plántulas de Banano (Musa AAA) en Cámara Térmica, Ecuador

“…Para Cedeño et al (2016), es aquella donde se someten los cormos y yemas a un sistema de limpieza, que comprende la termoterapia (temperaturas entre 50 y 70 °C), que influye en la activación de yemas. Silva et al (2018) indicaron que la termoterapia es una técnica eficiente que reduce la severidad de enfermedades que se podrían presentar. Borges et al (2021) señalaron que el proceso de propagación masiva en musáceas en las fases de multiplicación con el uso de nuevas técnicas ha dado ventajas con relación a los métodos tradicionales de propagación de estos cultivos.…”