Springer

Effect of Dislodging Techniques on Foliar Residue Determination for Agricultural Crops

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Abstract 
The Agricultural Reentry Task Force (ARTF) conducted a study to determine whether different dislodgeable foliar residue (DFR) techniques had any effect on the amount of residues dislodged from the leaves of vegetable crops. Four previously employed techniques were evaluated with two chemicals (carbaryl and methomyl) on two crops (cabbage and lettuce). Carbaryl, a moderately water-soluble chemical, was applied at a rate of 2.0 lbs active ingredient/acre (lb ai/A) while methomyl, a highly water soluble chemical, was applied at a rate of 0.9 lb ai/A. One day after application, leaf punches were collected and the residues were dislodged following one of four techniques that differed in the number of dislodgings per sample, the duration of dislodging, the solution volume, and/or the type of solution used. The results indicated that three of the techniques gave similar results, whereas a fourth gave marginally lower results.

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