Aims: To examine the interaction of diagnostic techniques, initial titres of Leifsonia xyli subsp. xyli (Lxx), sugarcane genotype and thermotherapy on ratoon stunt (RSD) control. Methods and Results: Single buds of RB867515, RB92579 and RB966928 were submitted to 50°C/2 h or 52°C/30 min under factorial block design and five replications; results were checked 9 months later by serological (DBI) and molecular (PCR) techniques. A 10,000 bootstrapping simulations were performed to infer the best plot size based on the experimental coefficient of variation. Analysis of variance showed significance only on initial Lxx titres and RSD control. Despite the absence of significance in the overall analysis, minor differences in control success with different methods and cultivars are predicted to have a major epidemiological impact on RSD, considering successive harvests and vegetative increase. According to an epidemiological interpretation, the 50°C/2 h treatment was more effective, cultivar RB966928 was the most susceptible and the PCR-based method was the most sensitive for pathogen detection. The minimum required plants per plot was 15, indicating high precision of our experiment Conclusions: Data interpretation considered both the statistical analysis and the epidemiology aspect of RSD in order to improve RSD management. The Brazilian sugarcane industry will benefit from this approach since it is not using it.Significance and Impact of the Study: This is the first study that examined multiple factors that affect RSD control. Our work pinpointed the importance of the thermotherapy, its best combination as well as the diagnostic test. Also, the effect of the cultivar to respond to management strategies. Because the epidemiological aspect of RSD was taken into consideration, results of our work can have an impact on RSD control in the field.
The economic and social impact that coronavirus disease 2019 (COVID-19) can bring is undeniable since high numbers of active workers in production and service provision are being contaminated. In addition, those infected may have long-term sequelae, impairing their functional capacity, and consequently, their work activities. It considers that intervention in cardiopulmonary rehabilitation is of great importance, especially in the recovery stage, and should be carried out mainly with the aim of improving dyspnea, severe muscle weakness, and fatigue, to promote functional independence, and increase quality of life. Based on the limitations demonstrated in COVID-19 survivors, we developed a protocol based on the acronym #EASIER, which is divided into six phases. Such a study will be able to early identify the impact of COVID-19 in different severities as well as provide subsidies to guide physiotherapists early, through the correct prescription of rehabilitative interventional measures.
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