Assessments of bacterial blight of onion at two dates. The experimental plot was sown with naturally X. axonopodis pv. allii-contaminated onion (A. cepa L. cv. Chateau-vieux) seed lot, with a contamination rate of about 0.04%.



A data frame with 1134 rows and 5 variables:

[, 1:2]x,yGrid spatial coordinates.
[, 3]tDate of disease assessments.
[, 4]iDisease incidence. 0: Healthy, 1: Diseased.
[, 5]nSampling unit size. n = 1 means that the sampling unit size is the plant.


Roumagnac P, Pruvost O, Chiroleu F, Hughes G. 2004. Spatial and temporal analyses of bacterial blight of onion caused by Xanthomonas axonopodis pv. allii. Phytopathology 94, 138–146. doi:10.1094/PHYTO.2004.94.2.138