Catches of Planthoppers and Leafhoppers

Description

Data of a field trial concerning the impact of a genetically modified variety on the abundance of Planthoppers and Leafhoppers. The trial was designed as a randomized complete block design with 8 blocks (Row). In each block, three treatments were randomized: a conventional variety treated with insecticides (Insecticide), a genetically modified variety (GM), and the near-isogenic line (Iso) the to genetically modified line.

Usage

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Format

A data frame with 24 observations on the following 6 variables.

Field

a factor with levels 1 2, separating the two major sites of the trial. On field 1, the blocks 1-5 were situated, on field 2, blocks 6-8 were situated.

Row

a factor with 8 levels, specifying the blocks:R1 R2 R3 R4 R5 R6 R7 R8

Year

a numeric vector, for year 1 of the trial

Treatment

a factor with 3 levels, specifying the genetically modified variety GM, the conventional variety treated with insecticides Insecticide, and the variety that was near-isogenic to the GM variety Iso

Au_Bonitur

Counts of Auchenorryhncha by visual assessment

Zs_sweep_netting

Counts of the major species Zyginidia scutellaris, catched by sweep nets

Source

...

Examples

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data(Cica1)

layout(matrix(1:2,ncol=1))

ylim<-range(Cica1[,c("Au_Bonitur","Zs_sweep_netting")])

boxplot(Au_Bonitur ~ Treatment, data=Cica1,
 main= "Aucherrhyncha, visual assessment", ylim=ylim)

boxplot(Zs_sweep_netting ~ Treatment, data=Cica1,
 main="Z.scutellaris, sweep netting", ylim=ylim)

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