Abstract
The incidence and distribution of lettuce anthracnose (Microdochium panattonianum) was monitored at three sites at Werribee South, Victoria, in 1985 by means of Field Runner, a stratified random sampling program, installed on a portable microcomputer. The incidence on cv. Winterlake increased from 6.1% on 11 August to 25.5% on 9 September; the incidence on cv. Black Velvet increased from 5.3% on 20 August to 19.1% on 2 September. Disease severity on the majority of infected plants was light (1–30 lesions plant −1). The variance/mean ratios, Lloyd’s indices, K parameter of the negative binomial and Z scores measured by Field Runner confirmed that lettuce anthracnose was aggregated both within the fields and within rows and indicated epidemics commence from focal points. Field Runner was found to be a useful tool that allowed singlehanded assessment and analysis of disease incidence, severity, distribution in the field and monitoring of disease epidemics.
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Galea, V.J., Price, T.V. Lettuce anthracnose in Victoria: use of Field Runner to analyse spatial pattern of disease. Australasian Plant Pathology 16, 54–58 (1987). https://doi.org/10.1071/APP9870054
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DOI: https://doi.org/10.1071/APP9870054