cucumber {isdals}

Disease spread in cucumber

Description

Spread of a disease in cucumbers depends on climate and amount of fertilizer. The amount of infection on standardized plants was recorded after a number of days, and two plants were examined for each combination of climate and dose.

Usage

data(cucumber)

Format

A data frame with 12 observations on the following 3 variables.

disease

a numeric vector

climate

a factor with levels A (change to day temperature 3 hours before sunrise) and B (normal change to day temperature)

dose

a numeric vector with dose of applied fertilizer

Source

de Neergaard, E. et al (1993). Studies of Didymella bryoniae: the influence of nutrition and cultural practices on the occurrence of stem lesions and internal and external fruit rot on different cultivars of cucumber. Netherlands Journal of Plant Pathology. 99:335-343

Examples

data(cucumber)