On‐target deposition of aerially applied deltamethrin |
| |
Authors: | B D Hill D J Inaba D L Johnson |
| |
Institution: | Agriculture Canada, Research Station , Lethbridge, Alberta, TU 4B1 |
| |
Abstract: | Abstract The mean amount of deltamethrin deposited on natural substrates (i.e., soil and vegetation) in three experiments was 63, 73, and 76% of applied. Composite samples taken from 16 sites/replicate gave representative and repeatable measures of deposition. The use of Teflon discs as artificial targets to measure aerial deposition was investigated. The discs had only 34–71% mean trapping efficiency for the spray droplets. Deposition was quite variable among different sampling sites within a field (CV=73–83%). Much of this variation was caused by irregular overlapping of spray swaths. |
| |
Keywords: | aerial deposition deltamethrin residues Teflon® targets |
|
|