A proposal on methodology and data evaluation in the investigation of pesticide spray application

Authors

  • Heribert Koch Dienstleistungszentrum Ländlicher Raum Rheinhessen-Nahe-Hunsrück, Bad Kreuznach
  • Horst Knewitz Dienstleistungszentrum Ländlicher Raum Rheinhessen-Nahe-Hunsrück, Bad Kreuznach

DOI:

https://doi.org/10.5073/JfK.2011.09.03

Keywords:

Initial deposit, spray application, target, application quality, deposit

Abstract

Spray deposits are investigated in order to describe the application quality in canopies. Such measurements are labour and time consuming and researchers often prefer to investigate bulk samples. This reduces workload and costs but leads to a loss of information because it is not possible to describe the variability of deposits. It is recommended to document the sampling position of each individual sampling unit which in addition enables to describe the spatial distribution of the deposits. It is common to calculate the mean deposit as characteristic parameter. Instead of the mean we propose to use the proportion of targets with deposits lower than 3% or 5% of the nominal dose (kg/10 000m2). This value seems to be more appropriate because efficacy occurs on individual targets.

 

 

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Published

2011-09-01

Issue

Vol. 63 No. 9 (2011)

Section

Original Article

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