R: Data: Rainfall thresholds as support for timing fungicide...
huasahuasi
R Documentation
Data: Rainfall thresholds as support for timing fungicide applications in the control of potato late blight in Peru
Description
Timing fungicide sprays based on accumulated rainfall thresholds can be a successful
component of integrated management packages that include cultivars with moderate
or high levels of resistance to late blight. The simplicity of measuring accumulated rainfall means that the technology
can potentially be used by resource-poor farmers in developing countries.
Usage
data(huasahuasi)
Format
The format is:
List of 2 ( AUDPC, YIELD )
block
a factor with levels IIIIII
trt
a factor with levels 40mm7-daysNon-application
clon
a factor with levels C386209.10C387164.4Cruza148MusuqYungay
y1da
a numeric vector, Kgr./plot
y2da
a numeric vector, Kgr./plot
y3ra
a numeric vector, Kgr./plot
d44
a numeric vector, 44 days
d51
a numeric vector, 51 days
d100
a numeric vector, 100 days
Details
The experimental unit was formed by 4 furrows of 1.8 m of length, with distance
between furrows from 0.90 m and between plants of 0.30 m. In each furrow was
installed 5 plants. The experiment had 3 repetitions.
From the beginning of the experiment were fulfilled the following treatments
Thresholds 40 mm: Apply the fungicide when 40 precipitation mm accumulates.
The minimum interval between applications will be of 7 days.
Schedule 7 days: The applications should be carried out every 7 days calendar.
Without application: No fungicide application will be made.
The evaluation of the severity of the late blight in each treatment started to
emergency 80 percentage and then evaluations were made every 7 days until being observed
a physiological maturation of the crop.
Source
Experimental field, 2003. Data Kindly provided by Wilmer Perez.