European Journal of Plant Pathology ( IF 1.8 ) Pub Date : 2021-07-27 , DOI: 10.1007/s10658-021-02337-1 Cleilson do N. Uchôa 1 , Edson A. Pozza 2 , Wilson S. Moraes 3 , Herminio Souza Rocha 4 , Francisco Cleilson Lopes Costa 5
Knowing the patterns of Black Sigatoka development is essential to propose adequate disease management practices and evaluate their effects, which can be achieved through temporal analysis by integrating the evolving interactions of the pathosystem components, expressed by data on cumulative incidence and severity, and summarizing these data in a disease progress curve. Airborne spores are essential components for the progression of an epidemic in the context of a specific pathosystem. In this perspective, the spore count is an essential approach to assess and model an epidemic. This study evaluated the temporal dynamics of Black Sigatoka in a banana plantation in the Ribeira Valley, state of São Paulo, Brazil, while simultaneously performing a year-long evaluation of fungal spore aerobiology. The disease was intense during the rainy season, but the leaf emergence rate was high enough for quickly inverting the severity peak (between 169 and 197 days of evaluation). After that, the disease severity raised until reach the higher rates (around the score 7 out of 8). The disease progress curve of Black Sigatoka showed peaks of extreme severity, one in the rainy and another in the dry season, with high levels of ascospores in the air. The ascospore concentration and the severity of the disease correlated significantly on the same day of sampling and 15 days after ascospore sampling, corresponding to the average latency period of the disease in the region. The patterns of the disease progress curve in both peaks fitted the monomolecular model, with higher rates of disease increase in the rainy season.
中文翻译:
巴西圣保罗里贝拉河谷香蕉种植园中斐济球孢子菌子囊孢子季节性扩散的黑色 Sigatoka 流行病建模
了解 Black Sigatoka 的发展模式对于提出适当的疾病管理实践和评估其效果至关重要,这可以通过整合病理系统成分不断演变的相互作用(由累积发病率和严重程度的数据表示,并总结这些数据)进行时间分析来实现在疾病进展曲线中。在特定病理系统的背景下,空气传播的孢子是流行病发展的重要组成部分。从这个角度来看,孢子计数是评估和模拟流行病的重要方法。本研究评估了巴西圣保罗州里贝拉河谷香蕉种植园中黑斑叶斑病菌的时间动态,同时对真菌孢子的空气生物学进行了为期一年的评估。雨季发病较重,但是叶子出现率足够高,可以快速反转严重性峰值(评估的 169 天到 197 天之间)。之后,疾病严重程度升高,直到达到更高的比率(大约 8 分中的 7 分)。Black Sigatoka 的疾病进展曲线显示出极端严重的高峰,一个在雨季,另一个在旱季,空气中的子囊孢子水平很高。子囊孢子浓度和疾病严重程度在采样当天和子囊孢子采样后 15 天显着相关,对应于该地区疾病的平均潜伏期。两个峰值的疾病进展曲线模式符合单分子模型,雨季疾病增加率更高。