fumig: Profiles of fumigant concentration over time
In DAAGxtras: Data Sets and Functions, supplementary to DAAG

Description Usage Format Details Source References Examples

Fumigant concentrations are given at six times through a 120 minute fumigation, for seven different runs of the fumigation procedure.

fumig

A data frame with 8 observations on the following 8 variables.

testnam: a factor with levels Applied Test 1 Applied Test 2 Applied Test 3 Confirmation Test Query Applied Test 4 Applied Test Applied Test 5 Applied Test 6
Cultivar: a factor with levels Bogapple Chewton Pear (the names are invented)
X1: concentration (gm/cm$^3$) at 5 minutes
X2: concentration at 10 min
X3: concentration at 30 min
X4: concentration at 60 min
X5: concentration at 90 min
X6: concentration at 120 min

Sortpion of fumigant by the fruit, different between different cultivars, is the main reason for the decline in concentration over time.

John Maindonald

For s discussion of the technology, see:

Maindonald, J.H.; Waddell B.C.; Birtles D.B. 1991. Response to Methyl Bromide Fumigation of Codling Moth (Lepidoptera: Tortricidae) on Cherries. Journal of Economic Entomology 85: 1222-1230.