stirret.borers: Corn borer control by application of fungal spores.

Description Format Details Source Examples

Description

Corn borer control by application of fungal spores.

Format

A data frame with 60 observations on the following 4 variables.

block

block, 15 levels

trt

treatment, 4 levels

count1

count of borers on August 18

count2

count of borers on October 19

Details

Experiment conducted in 1935, Ottawa. European corn borer infestation was established by application of egg masses to plants. Treatments were applied on July 8 and July 19 at two levels, 0 and 40 grams per acre. The number of borers per plot were counted on Aug 18 and Oct 19.

Source

Stirrett, George M and Beall, Geoffrey and Timonin, M. (1937). A field experiment on the control of the European corn borer, Pyrausta nubilalis Hubn, by Beauveria bassiana Vuill. Sci. Agric., 17, 587–591. Table 2.

Examples

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data(stirret.borers)
dat <- stirret.borers

require(lattice)
xyplot(count2~count1|trt,dat, main="stirret.borers - by treatment",
       xlab="Early count of borers", ylab="Late count")

# Even though the data are counts, Normal distribution seems okay
# qqmath(~count1|trt, dat, main="stirret.borers")

m1 <- lm(count1 ~ trt + block, dat)
anova(m1)

if(require(effects)){
  e1 <- effect('trt',m1)
  as.data.frame(e1)
  plot(e1, main="stirret.borer")
}

agridat documentation built on May 2, 2019, 4:01 p.m.