Data from: Spatio-temporal distribution and environmental drivers of Barley yellow dwarf virus and vector abundance in Kansas

Several aphid species transmit barley yellow dwarf, a globally destructive disease caused by viruses that infect cereal grain crops. Data from >400 samples collected across Kansas wheat fields in 2014 and 2015 were used to develop spatio-temporal models predicting the extent to which landcover, temperature and precipitation affect spring aphid vector abundance and presence of individuals carrying Barley yellow dwarf virus (BYDV). The distribution of Rhopalosiphum padi abundance was not correlated with climate or landcover, but Sitobion avenae abundance was positively correlated to fall temperature and negatively correlated to spring temperature and precipitation. The abundance of Schizaphis graminum was negatively correlated with fall precipitation and winter temperature. The incidence of viruliferous (+BYDV) R. padi was positively correlated with fall precipitation but negatively correlated with winter precipitation. In contrast, the probability of +BYDV S. avenae was unaffected by precipitation but was positively correlated with average fall temperatures and distance to nearest forest or shrubland. R. padi and S. avenae were more prevalent at Eastern sample sites where ground cover is more grassland than cropland, suggesting that grassland may provide over-summering sites for vectors and pose a risk as potential BYDV reservoirs. Nevertheless, land cover patterns were not strongly associated with differences in abundance or probability that viruliferous aphids were present.

多种蚜虫可传播大麦黄矮病（Barley yellow dwarf），该病是由侵染谷类作物的病毒引发的全球性毁灭性病害。本研究利用2014至2015年于堪萨斯州麦田采集的400余份样本数据，构建时空模型，以解析土地覆被、气温与降水对春季蚜虫传毒介体种群丰度，以及携带大麦黄矮病毒（Barley yellow dwarf virus, BYDV）的蚜虫个体检出率的影响程度。禾谷缢管蚜（Rhopalosiphum padi）的种群丰度与气候及土地覆被无显著相关性；麦长管蚜（Sitobion avenae）的种群丰度则与秋季气温呈正相关，与春季气温及降水呈负相关。麦二叉蚜（Schizaphis graminum）的种群丰度与秋季降水、冬季气温呈负相关。携带BYDV的禾谷缢管蚜带毒率与秋季降水呈正相关，与冬季降水呈负相关。与之相对，麦长管蚜的带毒概率不受降水影响，但与秋季平均气温、距最近森林或灌丛的距离呈正相关。东部采样点的禾谷缢管蚜与麦长管蚜种群更为普遍，该区域地面覆被以草地而非农田为主，这表明草地可为蚜虫介体提供越夏场所，并可能成为BYDV的潜在储库，带来病害传播风险。尽管如此，土地覆被格局与蚜虫种群丰度或带毒蚜虫检出率的差异并无显著关联。