Mites: Mites and Wilt Disease

MitesR Documentation

Mites and Wilt Disease

Description

Data from an experiment to test whether exposure to mites protects against Wilt Disease in cotton plants.

Usage

data(Mites)

Format

A data frame with 47 observations on the following variables.

  • treatment a factor with levels mites and no mites

  • outcome a factor with levels wilt and no wilt

Details

Researchers suspected that attack of a plant by one organism induced resistance to subsequent attack by a different organism. Individually potted cotton plants were randomly allocated to two groups: infestation by spider mites or no infestation. After two weeks the mites were dutifully removed by a conscientious research assistant, and both groups were inoculated with Verticillium, a fungus that causes Wilt disease. More information can be found at https://www.causeweb.org/cause/webinar/activity/2010-01/.

Source

Statistics for the Life Sciences, Third Edition; Myra Samuels & Jeffrey Witmer (2003), page 409.

Examples

data(Mites)
if (require(mosaic)) {
  tally(~ treatment + outcome, data=Mites)
  tally(~ outcome | treatment, format="percent", data=Mites)
}


mosaicData documentation built on Sept. 1, 2022, 5:08 p.m.