aphids {mixreg}R Documentation

Data on the rate of infection of tobacco plants by a virus spread by aphids.

Description

The aphids data frame has 51 rows and 2 columns. These correspond to 51 independent experiments in which varying numbers of aphids were released in a flight chamber containing 12 infected and 69 healthy tobacco plants. The resulting number of infected plants was recorded.

Usage

data(aphids)

Format

This data frame contains the following columns:

n.aphids
the number of aphids released in the flight chamber in each instance
n.inf
the resulting number (out of a possible 69) of infected plants

DETERMINATION OF INFECTION

After 24 hours, the flight chamber was fumigated to kill the aphids, and the previously healthy plants were moved to a greenhouse and monitored to detect symptoms of infection. The number of plants displaying such symptons was recorded.

Source

These data appear courtesy of Gilles Boiteau and George Tai of the Potato Research Centre, Agriculture and Agri-Food Canada, Fredericton, New Brunswick. Any published work using these data should cite the paper given in the References.

References

Boiteau, G., M. Singh, R. P. Singh, G. C. C. Tai, and T. R. Turner (1998). Rate of spread of PVY-n by alate Myzus persicae (Sulzer) from infected to healthy plants under laboratory conditions. Potato Research, vol. 41, pp. 335 – 344.


[Package mixreg version 0.0-2 Index]